diff --git a/static/css/images/havenith-body-zones.png b/static/css/images/havenith-body-zones.png
new file mode 100644
index 00000000..4ac57c78
Binary files /dev/null and b/static/css/images/havenith-body-zones.png differ
diff --git a/static/html/preset-ensemble.html b/static/html/preset-ensemble.html
new file mode 100644
index 00000000..7c7897b5
--- /dev/null
+++ b/static/html/preset-ensemble.html
@@ -0,0 +1,196 @@
+<style>
+  .preset-ensemble-layout {
+    display: grid;
+    grid-template-columns: minmax(260px, 0.8fr) minmax(460px, 1.2fr);
+    gap: 24px;
+    font-size: 14px;
+  }
+
+  .preset-ensemble-image {
+    width: 100%;
+    max-width: 440px;
+    display: block;
+    margin: 8px auto 14px;
+  }
+
+  .preset-ensemble-controls {
+    display: grid;
+    grid-template-columns: 1fr 2fr;
+    gap: 10px 12px;
+    align-items: center;
+  }
+
+  .preset-ensemble-controls label,
+  .preset-region-row label {
+    margin: 0;
+    font-weight: 600;
+  }
+
+  .preset-ensemble-controls select,
+  .preset-ensemble-controls input,
+  .preset-region-row input {
+    width: 100%;
+    min-height: 34px;
+    border: 1px solid #b9b9b9;
+    border-radius: 3px;
+    padding: 5px 8px;
+    background: #fff;
+  }
+
+  .preset-region-heading {
+    display: flex;
+    align-items: baseline;
+    justify-content: space-between;
+    margin-bottom: 8px;
+  }
+
+  .preset-region-heading h3 {
+    font-size: 16px;
+    margin: 0;
+  }
+
+  .preset-region-heading span {
+    color: #555;
+    font-size: 12px;
+  }
+
+  .preset-region-grid {
+    display: grid;
+    grid-template-columns: 1fr;
+    gap: 8px;
+  }
+
+  .preset-region-row {
+    display: grid;
+    grid-template-columns: 100px minmax(210px, 1fr) 82px;
+    align-items: center;
+    gap: 8px;
+  }
+
+  .preset-region-source,
+  .preset-region-row input {
+    width: 100%;
+    min-height: 34px;
+    border: 1px solid #b9b9b9;
+    border-radius: 3px;
+    padding: 5px 8px;
+    background: #fff;
+  }
+
+  .preset-region-instructions {
+    margin: 0 0 12px;
+    padding: 10px 12px;
+    border-radius: 4px;
+    background: #eef5fa;
+    color: #29485e;
+    font-size: 12px;
+    line-height: 1.45;
+  }
+
+  .preset-region-column-headings {
+    display: grid;
+    grid-template-columns: 100px minmax(210px, 1fr) 82px;
+    gap: 8px;
+    margin: 0 0 6px;
+    color: #555;
+    font-size: 11px;
+    font-weight: 600;
+    text-transform: uppercase;
+  }
+
+  .preset-ensemble-note {
+    margin: 16px 0 0;
+    padding: 10px 12px;
+    border-left: 3px solid #6c757d;
+    background: #f6f6f6;
+    color: #444;
+    font-size: 12px;
+    line-height: 1.45;
+  }
+
+  .preset-description {
+    margin-top: 18px;
+    padding: 14px 16px;
+    border: 1px solid #d5d5d5;
+    border-radius: 4px;
+    background: #fafafa;
+  }
+
+  .preset-description h4 {
+    margin: 0 0 7px;
+    color: #333;
+    font-size: 15px;
+  }
+
+  .preset-description p {
+    margin: 0;
+    color: #444;
+    line-height: 1.5;
+  }
+
+  @media (max-width: 760px) {
+    .preset-ensemble-layout {
+      grid-template-columns: 1fr;
+    }
+  }
+</style>
+
+<div class="preset-ensemble-layout">
+  <section>
+    <div class="preset-ensemble-controls">
+      <label for="presetGender">Gender</label>
+      <select id="presetGender">
+        <option value="F">Female</option>
+        <option value="M">Male</option>
+      </select>
+
+      <label for="presetEnsemble">Preset ensemble</label>
+      <select id="presetEnsemble"></select>
+
+      <label for="presetClo">Whole-body I<sub>cl</sub></label>
+      <div>
+        <input id="presetClo" type="number" min="0" max="5" step="0.01" />
+        <span>clo</span>
+      </div>
+    </div>
+
+    <img
+      class="preset-ensemble-image"
+      src="/static/css/images/havenith-body-zones.png"
+      alt="Front, side and back views of the body insulation zones"
+    />
+
+    <p class="preset-ensemble-note">
+      Source: Havenith et al. (2013), ASHRAE 1504-TRP. Whole-body intrinsic
+      clothing insulation is from Tables 2 and 3. Regional total insulation at
+      0.2 m/s is from Tables 7 and 8. All fields remain editable after a preset
+      is selected. Editing a regional value recalculates whole-body
+      I<sub>cl</sub> with an area-weighted parallel model normalized to the
+      selected preset.
+    </p>
+  </section>
+
+  <section>
+    <div class="preset-region-heading">
+      <h3>Regional insulation</h3>
+      <span>I<sub>T</sub> [m&sup2;&middot;K/W]</span>
+    </div>
+    <p class="preset-region-instructions">
+      Choose the garments that most closely match what is actually worn on
+      each body zone. Values are regional measurements taken while the full
+      source ensemble was worn - they are not insulation values of an
+      individual garment. The numeric field remains editable for advanced
+      adjustments.
+    </p>
+    <div class="preset-region-column-headings" aria-hidden="true">
+      <span>Body zone</span>
+      <span>Clothing on this zone</span>
+      <span>Value</span>
+    </div>
+    <div id="presetRegionGrid" class="preset-region-grid"></div>
+    <div class="preset-description" aria-live="polite">
+      <h4 id="presetDescriptionTitle"></h4>
+      <p id="presetDescription"></p>
+    </div>
+  </section>
+</div>
diff --git a/static/js/ASHRAE/ashrae.js b/static/js/ASHRAE/ashrae.js
index 763c7c64..1bdbadce 100644
--- a/static/js/ASHRAE/ashrae.js
+++ b/static/js/ASHRAE/ashrae.js
@@ -182,6 +182,29 @@ $(function () {
     },
   });
 
+  $("#presetEnsembleDialog").dialog({
+    autoOpen: false,
+    width: Math.min(1100, $(window).width() - 40),
+    maxHeight: $(window).height() - 40,
+    modal: true,
+    resizable: true,
+    buttons: {
+      "Use ensemble": function () {
+        const clo = parseFloat($("#presetClo").val());
+        if (!Number.isFinite(clo) || clo < 0 || clo > 5) {
+          window.alert("Whole-body clothing insulation must be between 0 and 5 clo.");
+          return;
+        }
+        $("#clo").val(clo.toFixed(2));
+        $(this).dialog("close");
+        update();
+      },
+      Close: function () {
+        $(this).dialog("close");
+      },
+    },
+  });
+
   $("#localdialog").dialog({
     autoOpen: false,
     height: 900,
@@ -340,6 +363,212 @@ $("#ERF").click(function () {
   container.dialog("open");
 });
 
+function populatePresetEnsembleSelect() {
+  const gender = $("#presetGender").val();
+  const select = $("#presetEnsemble");
+  select.empty();
+  window.HAVENITH_PRESET_ENSEMBLES.filter(function (preset) {
+    return preset.gender === gender;
+  }).forEach(function (preset) {
+    select.append(
+      $("<option>", {
+        value: preset.code,
+        text:
+          preset.name +
+          " (" +
+          preset.code +
+          ") — " +
+          preset.country +
+          " — " +
+          preset.clo.toFixed(2) +
+          " clo",
+      })
+    );
+  });
+  applySelectedPresetEnsemble();
+}
+
+function applySelectedPresetEnsemble() {
+  const gender = $("#presetGender").val();
+  const code = $("#presetEnsemble").val();
+  const preset = window.HAVENITH_PRESET_ENSEMBLES.find(function (item) {
+    return item.gender === gender && item.code === code;
+  });
+  if (!preset) return;
+
+  $("#presetClo").val(preset.clo.toFixed(2));
+  $("#presetDescriptionTitle").text(
+    preset.name + " (" + preset.code + ", " + preset.country + ")"
+  );
+  $("#presetDescription").text(preset.description);
+  window.HAVENITH_REGION_KEYS.forEach(function (key) {
+    $("#preset-region-" + key).val(preset.regions[key].toFixed(3));
+  });
+  populateRegionalSourceSelects(preset);
+  $("#presetEnsembleDialog").data("presetBaseline", {
+    clo: preset.clo,
+    regions: $.extend({}, preset.regions),
+  });
+}
+
+function populateRegionalSourceSelects(selectedPreset) {
+  const presets = window.HAVENITH_PRESET_ENSEMBLES.filter(function (preset) {
+    return preset.gender === selectedPreset.gender;
+  });
+
+  window.HAVENITH_REGION_KEYS.forEach(function (key) {
+    const select = $("#preset-region-source-" + key);
+    select.empty();
+    presets.forEach(function (preset) {
+      const regionalClothing = window.havenithRegionalClothingLabel(
+        preset,
+        key
+      );
+      select.append(
+        $("<option>", {
+          value: preset.code,
+          text:
+            regionalClothing +
+            " — " +
+            preset.regions[key].toFixed(3),
+          title:
+            "Measured as part of " +
+            preset.name +
+            " (" +
+            preset.code +
+            "): " +
+            preset.description,
+        })
+      );
+    });
+    select.val(selectedPreset.code);
+    select.attr(
+      "title",
+      "Measured as part of " +
+        selectedPreset.name +
+        " (" +
+        selectedPreset.code +
+        "): " +
+        selectedPreset.description
+    );
+  });
+}
+
+function updateRegionFromMeasuredSource() {
+  const key = $(this).attr("data-region");
+  const gender = $("#presetGender").val();
+  const code = $(this).val();
+  const sourcePreset = window.HAVENITH_PRESET_ENSEMBLES.find(function (preset) {
+    return preset.gender === gender && preset.code === code;
+  });
+  if (!sourcePreset) return;
+
+  $("#preset-region-" + key).val(sourcePreset.regions[key].toFixed(3));
+  $(this).attr(
+    "title",
+    "Measured as part of " +
+      sourcePreset.name +
+      " (" +
+      sourcePreset.code +
+      "): " +
+      sourcePreset.description
+  );
+  updatePresetCloFromRegions();
+}
+
+function updatePresetCloFromRegions() {
+  const baseline = $("#presetEnsembleDialog").data("presetBaseline");
+  if (!baseline) return;
+
+  const editedRegions = {};
+  window.HAVENITH_REGION_KEYS.forEach(function (key) {
+    editedRegions[key] = parseFloat($("#preset-region-" + key).val());
+  });
+  const adjustedClo = window.havenithAdjustedClo(
+    baseline.clo,
+    baseline.regions,
+    editedRegions
+  );
+  if (Number.isFinite(adjustedClo)) {
+    $("#presetClo").val(adjustedClo.toFixed(2));
+  }
+}
+
+function initializePresetEnsembleDialog() {
+  const grid = $("#presetRegionGrid");
+  grid.empty();
+  window.HAVENITH_REGION_KEYS.forEach(function (key) {
+    const row = $("<div>", { class: "preset-region-row" });
+    row.append(
+      $("<label>", {
+        for: "preset-region-" + key,
+        text: window.HAVENITH_REGION_LABELS[key],
+      })
+    );
+    row.append(
+      $("<select>", {
+        id: "preset-region-source-" + key,
+        class: "preset-region-source",
+        "data-region": key,
+        "aria-label":
+          window.HAVENITH_REGION_LABELS[key] +
+          " clothing worn on this zone",
+      })
+    );
+    row.append(
+      $("<input>", {
+        id: "preset-region-" + key,
+        type: "number",
+        min: 0,
+        max: 2,
+        step: 0.001,
+      })
+    );
+    grid.append(row);
+  });
+
+  $(".preset-region-row input").bind(
+    "input keyup change",
+    updatePresetCloFromRegions
+  );
+  $(".preset-region-source").change(updateRegionFromMeasuredSource);
+  $("#presetGender").change(populatePresetEnsembleSelect);
+  $("#presetEnsemble").change(applySelectedPresetEnsemble);
+  populatePresetEnsembleSelect();
+}
+
+$("#usePresetEnsemble").click(function () {
+  const container = $("#presetEnsembleDialog");
+  if (!window.HAVENITH_PRESET_ENSEMBLES) {
+    $.ajax({
+      url: util.STATIC_URL + "/js/ASHRAE/preset-ensembles.js?v=7",
+      dataType: "script",
+      cache: true,
+      async: false,
+    });
+  }
+  if (!window.HAVENITH_PRESET_ENSEMBLES) {
+    window.alert("Preset ensemble data could not be loaded.");
+    return;
+  }
+  if (!container.children().length) {
+    $.ajax({
+      url: util.STATIC_URL + "/html/preset-ensemble.html",
+      success: function (data) {
+        container.html(data);
+        initializePresetEnsembleDialog();
+      },
+      async: false,
+    });
+  }
+  container.dialog(
+    "option",
+    "width",
+    Math.min(1100, Math.max(320, $(window).width() - 40))
+  );
+  container.dialog("open");
+});
+
 $("#localDisc").click(function () {
   const container = $("#localdialog");
   $.ajax({
diff --git a/static/js/ASHRAE/preset-ensembles.js b/static/js/ASHRAE/preset-ensembles.js
new file mode 100644
index 00000000..3ecc9326
--- /dev/null
+++ b/static/js/ASHRAE/preset-ensembles.js
@@ -0,0 +1,425 @@
+/*
+ * ASHRAE 1504-TRP preset ensembles.
+ *
+ * Whole-body `clo` values are intrinsic clothing insulation (Icl) from
+ * Havenith et al. (2013), Tables 2 and 3. Regional values are total insulation
+ * (IT, m2 K/W) at 0.2 m/s from Tables 7 and 8.
+ *
+ * Regional value order:
+ * head, upper arms, forearms, hands, chest, abdomen, back, buttocks,
+ * upper legs, lower legs, feet.
+ */
+(function (root) {
+var HAVENITH_REGION_KEYS = [
+  "head",
+  "upperArms",
+  "forearms",
+  "hands",
+  "chest",
+  "abdomen",
+  "back",
+  "buttocks",
+  "upperLegs",
+  "lowerLegs",
+  "feet",
+];
+
+var HAVENITH_REGION_LABELS = {
+  head: "Head",
+  upperArms: "Upper arms",
+  forearms: "Forearms",
+  hands: "Hands",
+  chest: "Chest",
+  abdomen: "Abdomen",
+  back: "Back",
+  buttocks: "Buttocks",
+  upperLegs: "Upper legs",
+  lowerLegs: "Lower legs",
+  feet: "Feet",
+};
+
+// Approximate adult body-surface fractions used to combine local insulation
+// with the parallel method. Fractions sum to 1.0.
+var HAVENITH_REGION_WEIGHTS = {
+  head: 0.07,
+  upperArms: 0.08,
+  forearms: 0.06,
+  hands: 0.05,
+  chest: 0.13,
+  abdomen: 0.13,
+  back: 0.13,
+  buttocks: 0.08,
+  upperLegs: 0.19,
+  lowerLegs: 0.04,
+  feet: 0.04,
+};
+
+var HAVENITH_ENSEMBLE_DETAILS = {
+  "F-ASTM": {
+    name: "ASTM calibration ensemble",
+    description: "Women's briefs, T-shirt, protective Nomex III pants and shirt, socks, and athletic shoes.",
+  },
+  "F-A1": {
+    name: "Shalwar kameez without scarf",
+    description: "Women's briefs, bra, polycotton shalwar pants, polycotton kameez shirt, and female sandals.",
+  },
+  "F-A2": {
+    name: "Shalwar kameez with scarf",
+    description: "Women's briefs, bra, polycotton shalwar pants, polycotton kameez shirt, draped polycotton scarf, and female sandals.",
+  },
+  "F-B1": {
+    name: "Polyester shalwar kameez without scarf",
+    description: "Women's briefs, bra, polyester shalwar pants, polyester kameez shirt, and female sandals.",
+  },
+  "F-B2": {
+    name: "Polyester shalwar kameez with scarf",
+    description: "Women's briefs, bra, polyester shalwar pants, polyester kameez shirt, draped polyester scarf, and female sandals.",
+  },
+  "F-D1": {
+    name: "Cotton shalwar kameez without scarf",
+    description: "Women's briefs, bra, cotton shalwar pants, cotton-polyester kameez shirt, and female sandals.",
+  },
+  "F-D2": {
+    name: "Cotton shalwar kameez with scarf",
+    description: "Women's briefs, bra, cotton shalwar pants, cotton-polyester kameez shirt, draped polyester scarf, and female sandals.",
+  },
+  "F-F1": {
+    name: "Abaya with long fitted hijab",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, polyester abaya, long fitted hijab, socks, and athletic shoes.",
+  },
+  "F-F2": {
+    name: "Abaya with short traditional hijab",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, polyester abaya, short traditional hijab, socks, and athletic shoes.",
+  },
+  "F-F3": {
+    name: "Abaya with long traditional hijab",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, polyester abaya, long traditional cotton hijab, socks, and athletic shoes.",
+  },
+  "F-F4": {
+    name: "Abaya with long hijab, no body layer",
+    description: "Bra, women's briefs, over-shirt, jeans, polyester abaya, long traditional cotton hijab, socks, and athletic shoes.",
+  },
+  "F-F5": {
+    name: "Abaya with short fitted hijab",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, polyester abaya, short fitted hijab, socks, and athletic shoes.",
+  },
+  "F-F6": {
+    name: "Abaya with fitted hijab and burka",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, polyester abaya, short fitted hijab, burka, socks, and athletic shoes.",
+  },
+  "F-G1": {
+    name: "Indonesian trouser suit without hijab",
+    description: "Bra, women's briefs, long-sleeved shirt, suit pants, buttoned suit jacket, socks, and athletic shoes.",
+  },
+  "F-G2": {
+    name: "Indonesian trouser suit with hijab",
+    description: "Bra, women's briefs, long-sleeved shirt, hijab, suit pants, buttoned suit jacket, socks, and athletic shoes.",
+  },
+  "F-G3": {
+    name: "Indonesian shirt and trousers with hijab",
+    description: "Bra, women's briefs, long-sleeved shirt, suit pants, hijab, socks, and athletic shoes; no suit jacket.",
+  },
+  "F-H1": {
+    name: "Indonesian shirt and skirt without scarf",
+    description: "Bra, women's briefs, long-sleeved shirt, skirt, socks, and athletic shoes.",
+  },
+  "F-H2": {
+    name: "Indonesian shirt and skirt with scarf",
+    description: "Bra, women's briefs, long-sleeved shirt, skirt, headscarf, socks, and athletic shoes.",
+  },
+  "F-L1": {
+    name: "Jeans and hijab without body layer",
+    description: "Bra, women's briefs, over-shirt, jeans, anta head cover, hijab, socks, and athletic shoes.",
+  },
+  "F-L2": {
+    name: "Jeans and hijab with body layer",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, anta head cover, hijab, socks, and athletic shoes.",
+  },
+  "F-L3": {
+    name: "Jeans, hijab and coat with body layer",
+    description: "Bra, women's briefs, stretch body layer, over-shirt, jeans, anta head cover, hijab, coat, socks, and athletic shoes.",
+  },
+  "F-M-S1": {
+    name: "Summer double-layer abaya without headscarf",
+    description: "Bra, women's briefs, full slip, double-layer polyester abaya, and female sandals.",
+  },
+  "F-M-S2": {
+    name: "Summer double-layer abaya with headscarf",
+    description: "Bra, women's briefs, full slip, double-layer polyester abaya, anta head cover, hijab, and female sandals.",
+  },
+  "F-M-W1": {
+    name: "Winter double-layer abaya without headscarf",
+    description: "Bra, women's briefs, long underwear pants, long-sleeved undershirt, full slip, double-layer polyester abaya, socks, and athletic shoes.",
+  },
+  "F-M-W2": {
+    name: "Winter double-layer abaya with headscarf",
+    description: "Bra, women's briefs, long underwear pants, long-sleeved undershirt, full slip, double-layer polyester abaya, anta head cover, hijab, socks, and athletic shoes.",
+  },
+  "F-N": {
+    name: "West African cotton dress",
+    description: "Bra, women's briefs, cotton dress, cotton headband, and female sandals.",
+  },
+  "F-O": {
+    name: "West African long shirt and trousers",
+    description: "Bra, women's briefs, long cotton shirt, long cotton pants, and female sandals.",
+  },
+  "F-S": {
+    name: "West African short shirt and trousers",
+    description: "Bra, women's briefs, short cotton shirt with long sleeves, long cotton pants, and female sandals.",
+  },
+  "F-W": {
+    name: "Chinese short-sleeved qipao",
+    description: "Bra, women's briefs, camisole, short-sleeved satin-polyester qipao, and female sandals.",
+  },
+  "F-X1": {
+    name: "Churidhar ensemble without shirt and head towel",
+    description: "Bra, women's briefs, churidhar pants, churidhar dress, shawl, and female sandals.",
+  },
+  "F-X2": {
+    name: "Churidhar ensemble with shirt and head towel",
+    description: "Bra, women's briefs, churidhar pants, churidhar dress, shirt, shawl, head towel, socks, and athletic shoes.",
+  },
+  "F-Y1": {
+    name: "Saree without shirt and head towel",
+    description: "Bra, women's briefs, underskirt, blouse, synthetic-polyester saree, and female sandals.",
+  },
+  "F-Y2": {
+    name: "Saree with shirt and head towel",
+    description: "Bra, women's briefs, underskirt, blouse, synthetic-polyester saree, shirt, head towel, socks, and athletic shoes.",
+  },
+  "M-ASTM": {
+    name: "ASTM calibration ensemble",
+    description: "Men's briefs, T-shirt, protective Nomex III pants and shirt, socks, and athletic shoes.",
+  },
+  "M-C": {
+    name: "Pakistani shalwar kameez",
+    description: "Men's briefs, polycotton shalwar pants, polycotton kameez shirt, socks, and athletic shoes.",
+  },
+  "M-E": {
+    name: "Indian/Pakistani shalwar kameez",
+    description: "Men's briefs, polycotton shalwar pants, polyester kameez shirt, socks, and athletic shoes.",
+  },
+  "M-I": {
+    name: "Indonesian workwear",
+    description: "Men's briefs, polycotton work shirt, polyester work pants, socks, and athletic shoes.",
+  },
+  "M-J1": {
+    name: "Kuwaiti dishdasha with long underwear",
+    description: "Men's briefs, polyester dishdasha, long underwear pants, long-sleeved undershirt, long serwal pants, tagiya, socks, and athletic shoes.",
+  },
+  "M-J2": {
+    name: "Kuwaiti dishdasha with ghutra",
+    description: "Men's briefs, polyester dishdasha, long underwear pants, long-sleeved undershirt, long serwal pants, tagiya, iqal, ghutra, socks, and athletic shoes.",
+  },
+  "M-J3": {
+    name: "Kuwaiti dishdasha, ghutra and coat",
+    description: "Men's briefs, polyester dishdasha, long underwear pants, long-sleeved undershirt, long serwal pants, tagiya, iqal, ghutra, coat, socks, and athletic shoes.",
+  },
+  "M-K1": {
+    name: "Kuwaiti dishdasha with T-shirt",
+    description: "Men's briefs, polycotton dishdasha, short-sleeved T-shirt, long serwal pants, tagiya, socks, and athletic shoes.",
+  },
+  "M-K2": {
+    name: "Kuwaiti dishdasha with T-shirt and ghutra",
+    description: "Men's briefs, polycotton dishdasha, short-sleeved T-shirt, long serwal pants, tagiya, iqal, ghutra, socks, and athletic shoes.",
+  },
+  "M-K3": {
+    name: "Kuwaiti dishdasha, ghutra and coat",
+    description: "Men's briefs, polycotton dishdasha, short-sleeved T-shirt, long serwal pants, tagiya, iqal, ghutra, coat, socks, and athletic shoes.",
+  },
+  "M-P": {
+    name: "West African long-sleeved shirt and trousers",
+    description: "Men's briefs, short cotton shirt with long sleeves, long cotton pants, and male sandals.",
+  },
+  "M-Q": {
+    name: "West African short-sleeved shirt and trousers",
+    description: "Men's briefs, short cotton shirt with short sleeves, long cotton pants, and male sandals.",
+  },
+  "M-R": {
+    name: "West African boubou ensemble",
+    description: "Men's briefs, short cotton shirt with long sleeves, long cotton pants, wide-sleeved boubou robe, African hat, and male sandals.",
+  },
+  "M-T": {
+    name: "West African shirt and shorts",
+    description: "Men's briefs, short cotton shirt with long sleeves, cotton shorts, and male sandals.",
+  },
+  "M-U": {
+    name: "West African long shirt and trousers",
+    description: "Men's briefs, long cotton shirt, long cotton pants, African hat, and male sandals.",
+  },
+  "M-V1": {
+    name: "Pakistani wide pants and long shirt",
+    description: "Men's briefs, large polycotton pants, matching long polycotton shirt, socks, and athletic shoes.",
+  },
+  "M-V2": {
+    name: "Pakistani ensemble with long underwear",
+    description: "Men's briefs, long underwear pants, long-sleeved undershirt, large polycotton pants, matching long shirt, socks, and athletic shoes.",
+  },
+  "M-V3": {
+    name: "Pakistani ensemble with underwear and coat",
+    description: "Men's briefs, long underwear pants, long-sleeved undershirt, large polycotton pants, matching long shirt, coat, socks, and athletic shoes.",
+  },
+  "M-Z": {
+    name: "Indian shirt, vest and trousers",
+    description: "Men's briefs, polyester pants, cotton bananian vest, shirt, head towel, socks, and athletic shoes.",
+  },
+};
+
+function havenithGarmentItems(description) {
+  return description
+    .replace(/\.$/, "")
+    .split(/,\s+(?:and\s+)?/)
+    .map(function (item) {
+      return item.replace(/^and\s+/i, "").trim();
+    })
+    .filter(function (item) {
+      return item.length > 0;
+    });
+}
+
+function havenithRegionalClothingLabel(preset, regionKey) {
+  var items = havenithGarmentItems(preset.description);
+  var patterns = {
+    head: /hijab|head|scarf|tagiya|iqal|ghutra|hat|burka/i,
+    upperArms: /shirt|t-shirt|kameez|body layer|dress|abaya|jacket|coat|slip|boubou|blouse|saree|qipao|camisole|vest/i,
+    forearms: /long-sleeved|long sleeved|kameez|dress|abaya|jacket|coat|boubou|saree/i,
+    hands: /glove/i,
+    chest: /bra|shirt|t-shirt|kameez|body layer|dress|abaya|jacket|coat|slip|boubou|blouse|saree|qipao|camisole|vest/i,
+    abdomen: /briefs|underwear|shirt|t-shirt|kameez|body layer|dress|abaya|jacket|coat|slip|boubou|blouse|saree|qipao|camisole|vest/i,
+    back: /shirt|t-shirt|kameez|body layer|dress|abaya|jacket|coat|slip|boubou|blouse|saree|qipao|camisole|vest/i,
+    buttocks: /briefs|underwear|pants|trousers|jeans|skirt|dress|abaya|dishdasha|serwal|slip|boubou|qipao|saree|shorts|coat/i,
+    upperLegs: /briefs|underwear|pants|trousers|jeans|skirt|dress|abaya|dishdasha|serwal|slip|boubou|qipao|saree|shorts|coat/i,
+    lowerLegs: /pants|trousers|jeans|skirt|dress|abaya|dishdasha|serwal|boubou|qipao|saree|coat/i,
+    feet: /sock|shoe|sandal/i,
+  };
+  var matchingItems = items.filter(function (item) {
+    return patterns[regionKey].test(item);
+  });
+
+  if (matchingItems.length) return matchingItems.join(" + ");
+  if (regionKey === "hands") return "Uncovered hands";
+  if (regionKey === "head") return "Uncovered head";
+  if (regionKey === "forearms") return "Uncovered forearms";
+  if (regionKey === "lowerLegs") return "Uncovered lower legs";
+  return "Uncovered / no listed garment";
+}
+
+function havenithParallelInsulation(regions) {
+  var reciprocal = HAVENITH_REGION_KEYS.reduce(function (sum, key) {
+    var value = parseFloat(regions[key]);
+    if (!Number.isFinite(value) || value <= 0) return NaN;
+    return sum + HAVENITH_REGION_WEIGHTS[key] / value;
+  }, 0);
+  return Number.isFinite(reciprocal) && reciprocal > 0
+    ? 1 / reciprocal
+    : NaN;
+}
+
+function havenithAdjustedClo(baseClo, baseRegions, editedRegions) {
+  var baseRegionalInsulation = havenithParallelInsulation(baseRegions);
+  var editedRegionalInsulation = havenithParallelInsulation(editedRegions);
+  if (
+    !Number.isFinite(baseClo) ||
+    !Number.isFinite(baseRegionalInsulation) ||
+    !Number.isFinite(editedRegionalInsulation)
+  ) {
+    return NaN;
+  }
+  return baseClo * (editedRegionalInsulation / baseRegionalInsulation);
+}
+
+function havenithPreset(code, country, gender, clo, values) {
+  var details = HAVENITH_ENSEMBLE_DETAILS[gender + "-" + code];
+  return {
+    code,
+    country,
+    gender,
+    clo,
+    name: details.name,
+    description: details.description,
+    regions: HAVENITH_REGION_KEYS.reduce(function (regions, key, index) {
+      regions[key] = values[index];
+      return regions;
+    }, {}),
+  };
+}
+
+var HAVENITH_PRESET_ENSEMBLES = [
+  havenithPreset("ASTM", "USA", "F", 0.79, [0.104, 0.271, 0.2, 0.105, 0.299, 0.458, 0.293, 0.358, 0.251, 0.171, 0.289]),
+  havenithPreset("A1", "Pakistan", "F", 0.76, [0.102, 0.204, 0.175, 0.097, 0.248, 0.364, 0.229, 0.343, 0.246, 0.148, 0.152]),
+  havenithPreset("A2", "India", "F", 0.92, [0.105, 0.222, 0.187, 0.095, 0.274, 0.336, 0.357, 0.422, 0.267, 0.159, 0.155]),
+  havenithPreset("B1", "India", "F", 0.57, [0.104, 0.171, 0.106, 0.099, 0.234, 0.416, 0.215, 0.33, 0.242, 0.138, 0.164]),
+  havenithPreset("B2", "India", "F", 0.74, [0.106, 0.186, 0.115, 0.099, 0.268, 0.411, 0.314, 0.397, 0.242, 0.139, 0.168]),
+  havenithPreset("D1", "Pakistan", "F", 0.64, [0.104, 0.179, 0.125, 0.096, 0.241, 0.343, 0.203, 0.321, 0.239, 0.136, 0.159]),
+  havenithPreset("D2", "Pakistan", "F", 0.69, [0.104, 0.186, 0.126, 0.091, 0.252, 0.356, 0.294, 0.381, 0.232, 0.135, 0.157]),
+  havenithPreset("F1", "Pakistan", "F", 1.38, [0.148, 0.436, 0.282, 0.112, 0.432, 0.586, 0.479, 0.465, 0.274, 0.208, 0.302]),
+  havenithPreset("F2", "Pakistan", "F", 1.33, [0.202, 0.329, 0.248, 0.116, 0.419, 0.538, 0.454, 0.396, 0.258, 0.211, 0.292]),
+  havenithPreset("F3", "Pakistan", "F", 1.36, [0.222, 0.378, 0.255, 0.115, 0.471, 0.574, 0.494, 0.417, 0.255, 0.216, 0.301]),
+  havenithPreset("F4", "Pakistan", "F", 1.21, [0.237, 0.332, 0.218, 0.107, 0.416, 0.398, 0.374, 0.384, 0.276, 0.215, 0.308]),
+  havenithPreset("F5", "Pakistan", "F", 1.28, [0.145, 0.304, 0.267, 0.12, 0.39, 0.571, 0.408, 0.404, 0.264, 0.209, 0.296]),
+  havenithPreset("F6", "Pakistan", "F", 1.38, [0.184, 0.32, 0.266, 0.123, 0.436, 0.579, 0.416, 0.433, 0.271, 0.214, 0.303]),
+  havenithPreset("G1", "Indonesia", "F", 0.84, [0.106, 0.306, 0.305, 0.124, 0.371, 0.621, 0.313, 0.321, 0.2, 0.159, 0.273]),
+  havenithPreset("G2", "Indonesia", "F", 0.95, [0.193, 0.305, 0.276, 0.114, 0.39, 0.597, 0.371, 0.321, 0.193, 0.158, 0.274]),
+  havenithPreset("G3", "Indonesia", "F", 0.7, [0.19, 0.213, 0.196, 0.108, 0.264, 0.317, 0.264, 0.225, 0.164, 0.155, 0.302]),
+  havenithPreset("H1", "Indonesia", "F", 0.81, [0.103, 0.231, 0.209, 0.116, 0.233, 0.301, 0.219, 0.282, 0.257, 0.146, 0.279]),
+  havenithPreset("H2", "Indonesia", "F", 0.97, [0.2, 0.234, 0.203, 0.113, 0.278, 0.307, 0.265, 0.262, 0.251, 0.151, 0.273]),
+  havenithPreset("L1", "Kuwait", "F", 0.67, [0.232, 0.222, 0.126, 0.089, 0.263, 0.251, 0.262, 0.243, 0.206, 0.172, 0.286]),
+  havenithPreset("L2", "Kuwait", "F", 0.76, [0.229, 0.234, 0.152, 0.098, 0.319, 0.343, 0.328, 0.273, 0.18, 0.168, 0.278]),
+  havenithPreset("L3", "Kuwait", "F", 1.26, [0.227, 0.401, 0.346, 0.144, 0.48, 0.698, 0.463, 0.465, 0.291, 0.169, 0.273]),
+  havenithPreset("M-S1", "Kuwait", "F", 1.08, [0.102, 0.334, 0.25, 0.141, 0.308, 0.413, 0.312, 0.346, 0.291, 0.166, 0.202]),
+  havenithPreset("M-S2", "Kuwait", "F", 1.27, [0.237, 0.36, 0.279, 0.142, 0.37, 0.414, 0.394, 0.352, 0.306, 0.151, 0.203]),
+  havenithPreset("M-W1", "Kuwait", "F", 1.18, [0.101, 0.406, 0.33, 0.132, 0.367, 0.622, 0.359, 0.41, 0.35, 0.203, 0.308]),
+  havenithPreset("M-W2", "Kuwait", "F", 1.54, [0.227, 0.416, 0.321, 0.126, 0.424, 0.615, 0.445, 0.421, 0.359, 0.207, 0.313]),
+  havenithPreset("N", "Nigeria/Ghana", "F", 0.65, [0.129, 0.245, 0.113, 0.097, 0.222, 0.227, 0.209, 0.233, 0.196, 0.124, 0.163]),
+  havenithPreset("O", "Nigeria/Ghana", "F", 0.79, [0.105, 0.267, 0.134, 0.098, 0.26, 0.331, 0.23, 0.336, 0.276, 0.152, 0.162]),
+  havenithPreset("S", "Nigeria/Ghana", "F", 0.78, [0.105, 0.269, 0.174, 0.1, 0.228, 0.311, 0.227, 0.333, 0.24, 0.154, 0.156]),
+  havenithPreset("W", "China", "F", 0.42, [0.096, 0.12, 0.094, 0.09, 0.21, 0.205, 0.191, 0.233, 0.192, 0.129, 0.215]),
+  havenithPreset("X1", "India", "F", 0.58, [0.103, 0.127, 0.102, 0.1, 0.239, 0.24, 0.242, 0.262, 0.22, 0.149, 0.225]),
+  havenithPreset("X2", "India", "F", 0.74, [0.149, 0.203, 0.105, 0.09, 0.283, 0.353, 0.355, 0.36, 0.248, 0.154, 0.264]),
+  havenithPreset("Y1", "India", "F", 0.74, [0.105, 0.173, 0.103, 0.095, 0.272, 0.477, 0.198, 0.302, 0.314, 0.145, 0.16]),
+  havenithPreset("Y2", "India", "F", 0.96, [0.159, 0.246, 0.097, 0.093, 0.368, 0.677, 0.405, 0.404, 0.363, 0.178, 0.281]),
+  havenithPreset("ASTM", "USA", "M", 0.74, [0.099, 0.24, 0.19, 0.085, 0.282, 0.43, 0.275, 0.44, 0.242, 0.166, 0.241]),
+  havenithPreset("C", "Pakistan", "M", 0.86, [0.099, 0.231, 0.208, 0.092, 0.207, 0.367, 0.215, 0.372, 0.315, 0.167, 0.219]),
+  havenithPreset("E", "India", "M", 0.99, [0.104, 0.22, 0.221, 0.098, 0.199, 0.399, 0.198, 0.463, 0.375, 0.196, 0.237]),
+  havenithPreset("I", "Indonesia", "M", 0.61, [0.103, 0.196, 0.094, 0.084, 0.227, 0.362, 0.202, 0.416, 0.213, 0.145, 0.233]),
+  havenithPreset("J1", "Kuwait", "M", 1.1, [0.111, 0.258, 0.268, 0.101, 0.27, 0.452, 0.283, 0.421, 0.334, 0.204, 0.238]),
+  havenithPreset("J2", "Kuwait", "M", 1.3, [0.182, 0.269, 0.258, 0.099, 0.333, 0.462, 0.354, 0.437, 0.341, 0.206, 0.239]),
+  havenithPreset("J3", "Kuwait", "M", 1.74, [0.18, 0.369, 0.348, 0.101, 0.494, 0.711, 0.573, 0.575, 0.431, 0.21, 0.24]),
+  havenithPreset("K1", "Kuwait", "M", 1.07, [0.102, 0.239, 0.23, 0.107, 0.277, 0.474, 0.278, 0.449, 0.363, 0.176, 0.192]),
+  havenithPreset("K2", "Kuwait", "M", 1.36, [0.183, 0.255, 0.236, 0.103, 0.333, 0.481, 0.359, 0.484, 0.379, 0.175, 0.198]),
+  havenithPreset("K3", "Kuwait", "M", 1.76, [0.178, 0.36, 0.328, 0.114, 0.452, 0.688, 0.541, 0.647, 0.472, 0.183, 0.194]),
+  havenithPreset("P", "Nigeria/Ghana", "M", 0.64, [0.1, 0.233, 0.164, 0.091, 0.207, 0.375, 0.221, 0.293, 0.226, 0.152, 0.154]),
+  havenithPreset("Q", "Nigeria/Ghana", "M", 0.61, [0.099, 0.228, 0.099, 0.086, 0.211, 0.384, 0.233, 0.339, 0.231, 0.152, 0.152]),
+  havenithPreset("R", "Nigeria/Ghana", "M", 1.4, [0.117, 0.433, 0.321, 0.144, 0.319, 0.617, 0.339, 0.505, 0.364, 0.201, 0.171]),
+  havenithPreset("T", "Nigeria/Ghana", "M", 0.45, [0.101, 0.235, 0.155, 0.087, 0.197, 0.34, 0.218, 0.405, 0.159, 0.074, 0.139]),
+  havenithPreset("U", "Nigeria/Ghana", "M", 0.84, [0.12, 0.254, 0.112, 0.085, 0.228, 0.411, 0.208, 0.333, 0.284, 0.153, 0.158]),
+  havenithPreset("V1", "Pakistan", "M", 0.9, [0.101, 0.233, 0.202, 0.097, 0.211, 0.47, 0.203, 0.482, 0.327, 0.167, 0.233]),
+  havenithPreset("V2", "Pakistan", "M", 1.06, [0.101, 0.277, 0.252, 0.097, 0.279, 0.623, 0.277, 0.613, 0.369, 0.205, 0.235]),
+  havenithPreset("V3", "Pakistan", "M", 1.23, [0.087, 0.382, 0.361, 0.119, 0.406, 0.928, 0.42, 0.654, 0.459, 0.208, 0.235]),
+  havenithPreset("Z", "India", "M", 0.61, [0.145, 0.166, 0.097, 0.085, 0.256, 0.372, 0.309, 0.369, 0.167, 0.166, 0.239]),
+];
+
+root.HAVENITH_REGION_KEYS = HAVENITH_REGION_KEYS;
+root.HAVENITH_REGION_LABELS = HAVENITH_REGION_LABELS;
+root.HAVENITH_REGION_WEIGHTS = HAVENITH_REGION_WEIGHTS;
+root.HAVENITH_ENSEMBLE_DETAILS = HAVENITH_ENSEMBLE_DETAILS;
+root.havenithGarmentItems = havenithGarmentItems;
+root.havenithRegionalClothingLabel = havenithRegionalClothingLabel;
+root.HAVENITH_PRESET_ENSEMBLES = HAVENITH_PRESET_ENSEMBLES;
+root.havenithParallelInsulation = havenithParallelInsulation;
+root.havenithAdjustedClo = havenithAdjustedClo;
+
+if (typeof module !== "undefined" && module.exports) {
+  module.exports = {
+    HAVENITH_REGION_KEYS,
+    HAVENITH_REGION_LABELS,
+    HAVENITH_REGION_WEIGHTS,
+    HAVENITH_ENSEMBLE_DETAILS,
+    havenithGarmentItems,
+    havenithRegionalClothingLabel,
+    HAVENITH_PRESET_ENSEMBLES,
+    havenithParallelInsulation,
+    havenithAdjustedClo,
+  };
+}
+})(typeof window !== "undefined" ? window : this);
diff --git a/static/js/ASHRAE/preset-ensembles.test.js b/static/js/ASHRAE/preset-ensembles.test.js
new file mode 100644
index 00000000..2e1f59e4
--- /dev/null
+++ b/static/js/ASHRAE/preset-ensembles.test.js
@@ -0,0 +1,95 @@
+const {
+  HAVENITH_REGION_KEYS,
+  HAVENITH_REGION_WEIGHTS,
+  HAVENITH_PRESET_ENSEMBLES,
+  havenithAdjustedClo,
+  havenithRegionalClothingLabel,
+} = require("./preset-ensembles");
+
+describe("ASHRAE 1504-TRP preset ensembles", () => {
+  test("contains all 52 measured female and male configurations", () => {
+    expect(HAVENITH_PRESET_ENSEMBLES).toHaveLength(52);
+    expect(
+      HAVENITH_PRESET_ENSEMBLES.filter((preset) => preset.gender === "F")
+    ).toHaveLength(33);
+    expect(
+      HAVENITH_PRESET_ENSEMBLES.filter((preset) => preset.gender === "M")
+    ).toHaveLength(19);
+  });
+
+  test("provides every regional value for every preset", () => {
+    HAVENITH_PRESET_ENSEMBLES.forEach((preset) => {
+      expect(preset.name.length).toBeGreaterThan(3);
+      expect(preset.description.length).toBeGreaterThan(20);
+      expect(Object.keys(preset.regions)).toEqual(HAVENITH_REGION_KEYS);
+      HAVENITH_REGION_KEYS.forEach((key) => {
+        expect(Number.isFinite(preset.regions[key])).toBe(true);
+        expect(preset.regions[key]).toBeGreaterThan(0);
+      });
+    });
+  });
+
+  test("matches representative report values", () => {
+    const femaleA1 = HAVENITH_PRESET_ENSEMBLES.find(
+      (preset) => preset.gender === "F" && preset.code === "A1"
+    );
+    const maleK3 = HAVENITH_PRESET_ENSEMBLES.find(
+      (preset) => preset.gender === "M" && preset.code === "K3"
+    );
+
+    expect(femaleA1.clo).toBe(0.76);
+    expect(femaleA1.regions.abdomen).toBe(0.364);
+    expect(maleK3.clo).toBe(1.76);
+    expect(maleK3.regions.buttocks).toBe(0.647);
+  });
+
+  test("regional weights are normalized", () => {
+    expect(
+      Object.values(HAVENITH_REGION_WEIGHTS).reduce(
+        (sum, weight) => sum + weight,
+        0
+      )
+    ).toBeCloseTo(1, 10);
+  });
+
+  test("recalculates clo when regional insulation changes", () => {
+    const preset = HAVENITH_PRESET_ENSEMBLES.find(
+      (item) => item.gender === "M" && item.code === "K3"
+    );
+    const unchanged = havenithAdjustedClo(
+      preset.clo,
+      preset.regions,
+      preset.regions
+    );
+    const warmerChest = {
+      ...preset.regions,
+      chest: preset.regions.chest * 2,
+    };
+    const adjusted = havenithAdjustedClo(
+      preset.clo,
+      preset.regions,
+      warmerChest
+    );
+
+    expect(unchanged).toBeCloseTo(preset.clo, 10);
+    expect(adjusted).toBeGreaterThan(preset.clo);
+  });
+
+  test("shows only garments relevant to a selected body zone", () => {
+    const preset = HAVENITH_PRESET_ENSEMBLES.find(
+      (item) => item.gender === "F" && item.code === "F6"
+    );
+    const head = havenithRegionalClothingLabel(preset, "head");
+    const chest = havenithRegionalClothingLabel(preset, "chest");
+    const feet = havenithRegionalClothingLabel(preset, "feet");
+
+    expect(head).toContain("hijab");
+    expect(head).toContain("burka");
+    expect(head).not.toContain("shoes");
+    expect(chest).toContain("abaya");
+    expect(chest).not.toContain("socks");
+    expect(feet).toContain("socks");
+    expect(feet).toContain("shoes");
+    expect(feet).not.toContain("abaya");
+  });
+});
diff --git a/templates/ashrae.html b/templates/ashrae.html
index 500f0743..118fa1c6 100644
--- a/templates/ashrae.html
+++ b/templates/ashrae.html
@@ -255,6 +255,18 @@
               <button id="setClo" class="col-sm-12">Set clo value</button>
             </div>
 
+            {# preset clothing ensemble button #}
+            <div class="row justify-content-center mt-2">
+              <button
+                type="button"
+                id="usePresetEnsemble"
+                class="btn btn-light border"
+                data-tooltip="Select an ASHRAE 1504-TRP ensemble with editable whole-body and regional insulation values"
+              >
+                Use preset ensemble
+              </button>
+            </div>
+
             {# dynamic prediction of clothing #}
             <div
               class="row justify-content-center mt-2 btn-group-toggle"
@@ -638,6 +650,10 @@
         id="ERFdialog"
         title="SolarCal: shortwave radiation calculator"
       ></div>
+      <div
+        id="presetEnsembleDialog"
+        title="ASHRAE 1504-TRP preset ensemble"
+      ></div>
 
       {# divider that contains the figures#}
       <div class="row justify-content-center">
@@ -826,9 +842,13 @@
   </div>
 </div>
 
+<script
+  type="text/javascript"
+  src="../static/js/ASHRAE/preset-ensembles.js?v=7"
+></script>
 <script
   language="javascript"
-  src="../static/js/ASHRAE/ashrae.js"
+  src="../static/js/ASHRAE/ashrae.js?v=preset-ensemble-10"
   type="text/javascript"
 ></script>
 <script>