{"id":28611,"date":"2025-06-19T17:52:36","date_gmt":"2025-06-19T17:52:36","guid":{"rendered":"https:\/\/baghouse.com\/?page_id=28611"},"modified":"2026-10-06T23:32:51","modified_gmt":"2026-10-06T23:32:51","slug":"duct-size-calculator","status":"publish","type":"page","link":"https:\/\/baghouse.com\/es\/duct-size-calculator\/","title":{"rendered":"Calculadora de Tama\u00f1o del Ducto"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"28611\" class=\"elementor elementor-28611\" data-elementor-post-type=\"page\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a1b3a69 e-flex e-con-boxed e-con e-parent\" data-id=\"a1b3a69\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6d16bb4 elementor-position-inline-start elementor-view-default elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"6d16bb4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<a href=\"https:\/\/baghouse.com\/baghouse-design-calculations-free-online-tools-for-system-design\/\" class=\"elementor-icon\" tabindex=\"-1\" aria-label=\"Back to Baghouse Design Calculators\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-arrow-alt-circle-left\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M8 256c0 137 111 248 248 248s248-111 248-248S393 8 256 8 8 119 8 256zm448 0c0 110.5-89.5 200-200 200S56 366.5 56 256 145.5 56 256 56s200 89.5 200 200zm-72-20v40c0 6.6-5.4 12-12 12H256v67c0 10.7-12.9 16-20.5 8.5l-99-99c-4.7-4.7-4.7-12.3 0-17l99-99c7.6-7.6 20.5-2.2 20.5 8.5v67h116c6.6 0 12 5.4 12 12z\"><\/path><\/svg>\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<a href=\"https:\/\/baghouse.com\/baghouse-design-calculations-free-online-tools-for-system-design\/\" >\n\t\t\t\t\t\t\tBack to Baghouse Design Calculators\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-1aa1b40 elementor-widget elementor-widget-heading\" data-id=\"1aa1b40\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Duct Size Calculator<\/h2>\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-d623f42 e-flex e-con-boxed e-con e-parent\" data-id=\"d623f42\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t<div class=\"elementor-element elementor-element-254e2b9 e-con-full e-flex e-con e-child\" data-id=\"254e2b9\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t<div class=\"elementor-element elementor-element-f92b8a3 elementor-widget elementor-widget-heading\" data-id=\"f92b8a3\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">What Is the Duct Size?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f27999d elementor-widget elementor-widget-text-editor\" data-id=\"f27999d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p>Duct sizing refers to the calculation of the appropriate diameter for your system\u2019s ductwork based on how much air (measured in CFM) needs to be transported and at what velocity (measured in feet per minute, or FPM). The goal is to select a duct size that allows for proper dust conveyance without excessive friction loss or particle dropout.<\/p><div id=\"attachment_24732\" style=\"width: 310px\" class=\"wp-caption alignnone\"><img fetchpriority=\"high\" decoding=\"async\" aria-describedby=\"caption-attachment-24732\" class=\"size-medium wp-image-24732\" src=\"https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood-300x206.png\" alt=\"Well-designed hoods should minimize turbulence, maintain smooth airflow, and include air locks to prevent blowback into the system.\" width=\"300\" height=\"206\" srcset=\"https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood-300x206.png 300w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood-1030x708.png 1030w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood-768x528.png 768w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood-705x484.png 705w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood-450x309.png 450w, https:\/\/baghouse.com\/wp-content\/uploads\/2024\/10\/Hood.png 1157w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><p id=\"caption-attachment-24732\" class=\"wp-caption-text\">Well-designed hoods should minimize turbulence, maintain smooth airflow, and include air locks to<br \/>prevent blowback into the system.<\/p><\/div>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4b9e622 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"4b9e622\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-914d015 elementor-widget elementor-widget-heading\" data-id=\"914d015\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">How to Use This Calculator<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4ea8dd0 elementor-widget elementor-widget-text-editor\" data-id=\"4ea8dd0\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p data-path-to-node=\"1,0,0\"><b data-path-to-node=\"1,0,0\" data-index-in-node=\"0\">\u29bf Enter the System Airflow (CFM):<\/b> Input the total volume of air moving through the specific duct branch or main trunk.<\/p><p><b data-path-to-node=\"1,1,0\" data-index-in-node=\"0\">\u29bf Enter the Target Air Velocity (FPM):<\/b> Input the desired speed of the air (often 3,500 to 4,500 FPM for dust collection, depending on the material).<\/p><\/li><li><b data-path-to-node=\"1,2,0\" data-index-in-node=\"0\">\u29bf Calculate:<\/b> Click the calculate button to determine the exact duct diameter needed to maintain that velocity at your given airflow. You can then use the buttons below the calculator to email yourself a PDF summary of the results or request a free system sizing consultation from our engineering team.<\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-922593f elementor-widget elementor-widget-heading\" data-id=\"922593f\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Understanding the Formula<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-caab8a4 elementor-widget elementor-widget-text-editor\" data-id=\"caab8a4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"3\"><b data-path-to-node=\"3\" data-index-in-node=\"0\">Duct Diameter = 2 \u00d7 \u221a((CFM \u00f7 Velocity \u00d7 144) \u00f7 \u03c0)<\/b><\/p><p data-path-to-node=\"4\">Proper duct sizing is essential in dust collection to maintain the correct &#8220;conveying velocity.&#8221; If a duct is too large, the air slows down, and dust will settle out of the airstream and clog the pipe. If a duct is too small, the air moves too fast, causing severe abrasion and wasting fan energy through high static pressure.<\/p><p data-path-to-node=\"5\">This formula calculates the required cross-sectional area (by dividing CFM by Velocity), converts it to square inches, and then uses the geometry of a circle to solve for the required internal duct diameter in inches.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-347f4dd elementor-widget elementor-widget-heading\" data-id=\"347f4dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Importance of Duct Size In Baghouse Design<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8db3cda elementor-widget elementor-widget-text-editor\" data-id=\"8db3cda\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-start=\"963\" data-end=\"1263\">Poor duct sizing can lead to a number of costly issues. If the duct is too small, it can create excessive static pressure, overloading the fan and reducing system performance. If it\u2019s too large, air velocity may drop below the minimum transport velocity, causing dust to settle and clog the ductwork.<\/p><p data-start=\"1265\" data-end=\"1291\">Correct duct sizing helps maintain transport velocity above minimum values (typically 3,500\u20134,500 FPM, depending on material). It prevents dust accumulation and blockages as well as reducing energy use by avoiding oversized fans.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-42dafb1 elementor-widget-divider--view-line elementor-widget elementor-widget-divider\" data-id=\"42dafb1\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"divider.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-divider\">\n\t\t\t<span class=\"elementor-divider-separator\">\n\t\t\t\t\t\t<\/span>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-8d9cc68 elementor-widget elementor-widget-text-editor\" data-id=\"8d9cc68\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><strong data-start=\"6485\" data-end=\"6493\">Note<\/strong>: While this formula provides a solid starting point for duct sizing, <strong data-start=\"2011\" data-end=\"2075\">it should not be used as the only basis for design decisions<\/strong>. There are many other factors a dust collection expert considers, including duct length and layout, number of branches and elbows, material characteristics (abrasive, sticky, etc) and fan capacity and system static pressure.\u00a0<\/p><p>We strongly recommend consulting with a dust collection expert, such as the team at <strong data-start=\"2390\" data-end=\"2406\">Baghouse.com<\/strong>, before finalizing any ductwork layout. We can help tailor your system to your specific plant requirements and avoid costly design errors.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-db4453d elementor-align-center elementor-widget elementor-widget-button\" data-id=\"db4453d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"https:\/\/baghouse.com\/contact\/\" target=\"_blank\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">Talk to a Dust Collection Expert<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-91ced2e e-con-full e-flex e-con e-child\" data-id=\"91ced2e\" data-element_type=\"container\" data-e-type=\"container\" data-settings=\"{&quot;sticky&quot;:&quot;top&quot;,&quot;sticky_on&quot;:[&quot;desktop&quot;,&quot;tablet&quot;],&quot;sticky_offset&quot;:35,&quot;sticky_effects_offset&quot;:0,&quot;sticky_anchor_link_offset&quot;:0}\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a97ba0a elementor-widget elementor-widget-html\" data-id=\"a97ba0a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<!DOCTYPE html>\r\n<html lang=\"en\">\r\n<head>\r\n  <meta charset=\"UTF-8\" \/>\r\n  <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\"\/>\r\n  <title>Duct Size Calculator<\/title>\r\n  <style>\r\n    .duct-size-calculator,\r\n    .duct-size-calculator * {\r\n      box-sizing: border-box !important;\r\n      font-family: Verdana, sans-serif !important;\r\n      line-height: 1.2 !important;\r\n    }\r\n\r\n    .duct-size-calculator {\r\n      width: 100% !important;\r\n      padding: 30px 20px !important;\r\n    }\r\n\r\n    .duct-size-calculator .calculator-container {\r\n      max-width: 1100px !important;\r\n      margin: 0 auto !important;\r\n      padding: 20px !important;\r\n      background-color: #fff !important;\r\n      border: 1px solid #ccc !important;\r\n      box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;\r\n      color: #1c3b75 !important;\r\n    }\r\n\r\n    .duct-size-calculator h1 {\r\n      font-size: 25px !important;\r\n      margin-bottom: 5px !important;\r\n      text-align: center !important;\r\n      font-weight: bold !important;\r\n      text-transform: uppercase !important;\r\n    }\r\n\r\n    .duct-size-calculator .formula-container {\r\n      text-align: center !important;\r\n      margin: 15px 0 !important;\r\n      padding: 10px !important;\r\n      background-color: #f0f4fa !important;\r\n      border-radius: 6px !important;\r\n    }\r\n\r\n    .duct-size-calculator .formula-label {\r\n      font-size: 14px !important;\r\n      font-weight: bold !important;\r\n      margin-bottom: 5px !important;\r\n      color: #1c3b75 !important;\r\n    }\r\n\r\n    .duct-size-calculator .formula {\r\n      font-size: 14px !important;\r\n      font-weight: bold !important;\r\n      color: #1c3b75 !important;\r\n    }\r\n\r\n    .duct-size-calculator .input-row {\r\n      display: flex !important;\r\n      flex-wrap: wrap !important;\r\n      gap: 10px !important;\r\n      margin: 20px 0 !important;\r\n      justify-content: center !important;\r\n    }\r\n\r\n    .duct-size-calculator .input-group {\r\n      flex: 1 1 40% !important;\r\n      min-width: 220px !important;\r\n    }\r\n\r\n    .duct-size-calculator .input-group label {\r\n      display: block !important;\r\n      font-size: 12px !important;\r\n      margin-bottom: 2px !important;\r\n      color: #333 !important;\r\n    }\r\n\r\n    .duct-size-calculator .input-group input {\r\n      width: 100% !important;\r\n      padding: 12px !important;\r\n      font-size: 13px !important;\r\n      border: 1px solid #ccc !important;\r\n      border-radius: 4px !important;\r\n    }\r\n\r\n    .duct-size-calculator .button-wrapper {\r\n      margin: 20px 0 !important;\r\n      text-align: center !important;\r\n    }\r\n\r\n    .duct-size-calculator button.calc-btn {\r\n      padding: 12px 30px !important;\r\n      background-color: #466bb0 !important;\r\n      color: white !important;\r\n      font-size: 16px !important;\r\n      font-weight: bold !important;\r\n      border: none !important;\r\n      border-radius: 4px !important;\r\n      cursor: pointer !important;\r\n      box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2) !important;\r\n    }\r\n\r\n    .duct-size-calculator button.calc-btn:hover {\r\n      background-color: #355a9c !important;\r\n    }\r\n\r\n    .duct-size-calculator .result-container {\r\n      margin-top: 15px !important;\r\n      text-align: center !important;\r\n      font-size: 22px !important;\r\n      font-weight: bold !important;\r\n    }\r\n\r\n    .duct-size-calculator .result-label,\r\n    .duct-size-calculator .result-value {\r\n      color: #466bb0 !important;\r\n    }\r\n\r\n    .duct-size-calculator .result-units {\r\n      color: black !important;\r\n    }\r\n\r\n    .duct-size-calculator .error {\r\n      color: #ff6666 !important;\r\n      margin-top: 10px !important;\r\n      font-size: 13px !important;\r\n      text-align: center !important;\r\n    }\r\n\r\n    \/* Hide the Elementor Lead Capture buttons by default *\/\r\n    #baghouse-lead-capture {\r\n      display: none !important;\r\n      margin-top: 20px;\r\n    }\r\n\r\n    \/* Hide the new Custom Modal by default *\/\r\n    #custom-engineer-modal {\r\n      display: none !important; \r\n    }\r\n  <\/style>\r\n<\/head>\r\n<body>\r\n  <div class=\"duct-size-calculator\">\r\n    <div class=\"calculator-container\">\r\n      <h1>DUCT SIZE CALCULATOR<\/h1>\r\n\r\n      <div class=\"formula-container\">\r\n        <div class=\"formula-label\">Formula:<\/div>\r\n        <div class=\"formula\">\r\n          Duct Diameter = 2 \u00d7 \u221a((CFM \u00f7 Velocity \u00d7 144) \u00f7 \u03c0)\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"input-row\">\r\n        <div class=\"input-group\">\r\n          <label for=\"cfm\">System Airflow (CFM):<\/label>\r\n          <input type=\"number\" id=\"cfm\" placeholder=\"Enter CFM\" step=\"any\" required \/>\r\n        <\/div>\r\n        <div class=\"input-group\">\r\n          <label for=\"targetVelocity\">Target Air Velocity (FPM):<\/label>\r\n          <input type=\"number\" id=\"targetVelocity\" placeholder=\"Enter Target Velocity\" step=\"any\" required \/>\r\n        <\/div>\r\n      <\/div>\r\n\r\n      <div class=\"button-wrapper\">\r\n        <button class=\"calc-btn\" onclick=\"calculateDuctSize()\">CALCULATE<\/button>\r\n      <\/div>\r\n\r\n      <!-- Hidden by default using inline style -->\r\n      <div class=\"result-container\" id=\"resultContainer\" style=\"display: none;\">\r\n        <span class=\"result-label\">Duct Diameter = <\/span>\r\n        <span id=\"resultValue\" class=\"result-value\"><\/span>\r\n        <span class=\"result-units\"> inches<\/span>\r\n      <\/div>\r\n\r\n      <div id=\"error\" class=\"error\"><\/div>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <script>\r\n    function calculateDuctSize() {\r\n      const cfm = parseFloat(document.getElementById('cfm').value);\r\n      const velocity = parseFloat(document.getElementById('targetVelocity').value);\r\n      \r\n      const resultContainer = document.getElementById('resultContainer');\r\n      const resultSpan = document.getElementById('resultValue');\r\n      const errorDiv = document.getElementById('error');\r\n      const leadCaptureContainer = document.getElementById('baghouse-lead-capture');\r\n\r\n      \/\/ Reset visibility and text on new calculation attempt\r\n      resultContainer.style.display = 'none';\r\n      resultSpan.innerText = '';\r\n      errorDiv.innerText = '';\r\n      if (leadCaptureContainer) leadCaptureContainer.style.setProperty('display', 'none', 'important');\r\n\r\n      if (isNaN(cfm) || isNaN(velocity)) {\r\n        errorDiv.innerText = 'Please enter valid numbers in all fields.';\r\n        return;\r\n      }\r\n\r\n      if (cfm <= 0 || velocity <= 0) {\r\n        errorDiv.innerText = 'Values must be greater than 0.';\r\n        return;\r\n      }\r\n\r\n      \/\/ Calculation logic\r\n      const areaSqFt = cfm \/ velocity;\r\n      const areaSqIn = areaSqFt * 144;\r\n      const radius = Math.sqrt(areaSqIn \/ Math.PI);\r\n      const ductDiameter = (radius * 2).toFixed(2);\r\n      \r\n      resultSpan.innerText = ductDiameter;\r\n      \r\n      \/\/ Reveal the result container now that we have a valid number\r\n      resultContainer.style.display = 'block';\r\n\r\n      \/\/ 1. PUSH TO INLINE ELEMENTOR FORM (For YeePDF)\r\n      function injectData(fieldId, value) {\r\n        const field = document.getElementById('form-field-' + fieldId);\r\n        if (field) {\r\n          field.value = value;\r\n          field.dispatchEvent(new Event('input', { bubbles: true }));\r\n          field.dispatchEvent(new Event('change', { bubbles: true }));\r\n        }\r\n      }\r\n      \r\n      \/\/ Push values into the hidden Elementor fields\r\n      injectData('pdf_cfm', cfm);\r\n      injectData('pdf_target_velocity', velocity);\r\n      injectData('pdf_duct_size', ductDiameter);\r\n\r\n      \/\/ 2. PUSH DIRECTLY TO NINJA FORMS (For HubSpot)\r\n      if (typeof jQuery !== 'undefined') {\r\n        \/\/ REPLACE WITH YOUR ACTUAL NINJA FORMS HIDDEN FIELD IDs\r\n        jQuery('#nf-field-11').val('Duct Size Calculator').trigger('change');\r\n        jQuery('#nf-field-12').val(cfm).trigger('change');\r\n        jQuery('#nf-field-13').val(velocity).trigger('change');\r\n        jQuery('#nf-field-14').val(ductDiameter).trigger('change');\r\n      }\r\n\r\n      \/\/ 3. REVEAL THE ELEMENTOR LEAD CAPTURE BUTTONS\r\n      if (leadCaptureContainer) {\r\n        leadCaptureContainer.style.setProperty('display', 'flex', 'important');\r\n      }\r\n    }\r\n\r\n    \/\/ --- BULLETPROOF MODAL TRIGGERS ---\r\n    document.addEventListener('DOMContentLoaded', function() {\r\n      \r\n      \/\/ Open Modal Logic\r\n      const openBtns = document.querySelectorAll('.open-engineer-modal a, .open-engineer-modal');\r\n      openBtns.forEach(btn => {\r\n        btn.addEventListener('click', function(e) {\r\n          e.preventDefault(); \/\/ Stops the page from reloading\r\n          const modal = document.getElementById('custom-engineer-modal');\r\n          if(modal) {\r\n            modal.style.setProperty('display', 'flex', 'important');\r\n          } else {\r\n            console.error(\"Modal container not found! 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elementor-element-33a1e2a elementor-widget elementor-widget-heading\" data-id=\"33a1e2a\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Email results as PDF<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5ea4682 elementor-widget__width-initial elementor-button-align-stretch elementor-widget elementor-widget-form\" data-id=\"5ea4682\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;step_next_label&quot;:&quot;Next&quot;,&quot;step_previous_label&quot;:&quot;Previous&quot;,&quot;button_width&quot;:&quot;100&quot;,&quot;step_type&quot;:&quot;number_text&quot;,&quot;step_icon_shape&quot;:&quot;circle&quot;}\" data-widget_type=\"form.default\">\n\t\t\t\t\t\t\t<form class=\"elementor-form\" method=\"post\" name=\"Duct Size Calculator\" aria-label=\"Duct Size Calculator\">\r\n\t\t\t<input type=\"hidden\" name=\"post_id\" value=\"28611\"\/>\r\n\t\t\t<input type=\"hidden\" name=\"form_id\" value=\"5ea4682\"\/>\r\n\t\t\t<input type=\"hidden\" name=\"referer_title\" value=\"Duct Size Calculator for Dust Collection Systems\" \/>\r\n\r\n\t\t\t\t\t\t\t<input type=\"hidden\" name=\"queried_id\" value=\"28611\"\/>\r\n\t\t\t\r\n\t\t\t<div class=\"elementor-form-fields-wrapper elementor-labels-above\">\r\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-email elementor-field-group elementor-column elementor-field-group-email elementor-col-100 elementor-field-required\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"email\" name=\"form_fields[email]\" id=\"form-field-email\" class=\"elementor-field elementor-size-sm  elementor-field-textual\" placeholder=\"Email \" required=\"required\">\r\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-hidden elementor-field-group elementor-column elementor-field-group-pdf_cfm elementor-col-100\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"hidden\" name=\"form_fields[pdf_cfm]\" id=\"form-field-pdf_cfm\" class=\"elementor-field elementor-size-sm  elementor-field-textual\">\r\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-hidden elementor-field-group elementor-column elementor-field-group-pdf_target_velocity elementor-col-100\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"hidden\" name=\"form_fields[pdf_target_velocity]\" id=\"form-field-pdf_target_velocity\" class=\"elementor-field elementor-size-sm  elementor-field-textual\">\r\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-hidden elementor-field-group elementor-column elementor-field-group-pdf_duct_size elementor-col-100\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<input size=\"1\" type=\"hidden\" name=\"form_fields[pdf_duct_size]\" id=\"form-field-pdf_duct_size\" class=\"elementor-field elementor-size-sm  elementor-field-textual\">\r\n\t\t\t\t\t\t\t\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-type-recaptcha_v3 elementor-field-group elementor-column elementor-field-group-field_d7847f7 elementor-col-100 recaptcha_v3-bottomright\">\r\n\t\t\t\t\t<div class=\"elementor-field\" id=\"form-field-field_d7847f7\"><div class=\"elementor-g-recaptcha\" data-sitekey=\"6LeawMsrAAAAAGBu3gi81RQGRyUxbRF7RLEtw26_\" data-type=\"v3\" data-action=\"Form\" data-badge=\"bottomright\" data-size=\"invisible\"><\/div><\/div>\t\t\t\t<\/div>\r\n\t\t\t\t\t\t\t\t<div class=\"elementor-field-group elementor-column elementor-field-type-submit elementor-col-100 e-form__buttons\">\r\n\t\t\t\t\t<button class=\"elementor-button elementor-size-sm\" type=\"submit\">\r\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">SEND AS PDF<\/span>\r\n\t\t\t\t\t\t\t\t\t\t\t\t\t<\/span>\r\n\t\t\t\t\t<\/button>\r\n\t\t\t\t<\/div>\r\n\t\t\t<\/div>\r\n\t\t<\/form>\r\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-df6a615 elementor-widget elementor-widget-heading\" data-id=\"df6a615\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h2 class=\"elementor-heading-title elementor-size-default\">Have an engineer review this calculation<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6bfe880 open-engineer-modal elementor-widget elementor-widget-button\" data-id=\"6bfe880\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"button.default\">\n\t\t\t\t\t\t\t\t\t\t<a class=\"elementor-button elementor-button-link elementor-size-sm\" href=\"#\">\n\t\t\t\t\t\t<span class=\"elementor-button-content-wrapper\">\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-button-text\">get a free system sizing consultation<\/span>\n\t\t\t\t\t<\/span>\n\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-04b8a09 e-flex e-con-boxed e-con e-parent\" data-id=\"04b8a09\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-0733857 elementor-position-inline-start elementor-view-default elementor-mobile-position-block-start elementor-widget elementor-widget-icon-box\" data-id=\"0733857\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"icon-box.default\">\n\t\t\t\t\t\t\t<div class=\"elementor-icon-box-wrapper\">\n\n\t\t\t\t\t\t<div class=\"elementor-icon-box-icon\">\n\t\t\t\t<a href=\"https:\/\/baghouse.com\/baghouse-design-calculations-free-online-tools-for-system-design\/\" class=\"elementor-icon\" tabindex=\"-1\" aria-label=\"Back to Baghouse Design Calculators\">\n\t\t\t\t<svg aria-hidden=\"true\" class=\"e-font-icon-svg e-far-arrow-alt-circle-left\" viewBox=\"0 0 512 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M8 256c0 137 111 248 248 248s248-111 248-248S393 8 256 8 8 119 8 256zm448 0c0 110.5-89.5 200-200 200S56 366.5 56 256 145.5 56 256 56s200 89.5 200 200zm-72-20v40c0 6.6-5.4 12-12 12H256v67c0 10.7-12.9 16-20.5 8.5l-99-99c-4.7-4.7-4.7-12.3 0-17l99-99c7.6-7.6 20.5-2.2 20.5 8.5v67h116c6.6 0 12 5.4 12 12z\"><\/path><\/svg>\t\t\t\t<\/a>\n\t\t\t<\/div>\n\t\t\t\n\t\t\t\t\t\t<div class=\"elementor-icon-box-content\">\n\n\t\t\t\t\t\t\t\t\t<h3 class=\"elementor-icon-box-title\">\n\t\t\t\t\t\t<a href=\"https:\/\/baghouse.com\/baghouse-design-calculations-free-online-tools-for-system-design\/\" >\n\t\t\t\t\t\t\tBack to Baghouse Design Calculators\t\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/h3>\n\t\t\t\t\n\t\t\t\t\n\t\t\t<\/div>\n\t\t\t\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-5c36c48 e-flex e-con-boxed e-con e-parent\" data-id=\"5c36c48\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b54d753 elementor-widget elementor-widget-html\" data-id=\"b54d753\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t\t<script type=\"application\/ld+json\">\r\n{\r\n  \"@context\": \"https:\/\/schema.org\",\r\n  \"@graph\": [\r\n    {\r\n      \"@type\": \"BreadcrumbList\",\r\n      \"itemListElement\": [\r\n        { \"@type\": \"ListItem\", \"position\": 1, \"name\": \"Home\", \"item\": \"https:\/\/baghouse.com\/\" },\r\n        { \"@type\": \"ListItem\", \"position\": 2, \"name\": \"Calculators\", \"item\": \"https:\/\/baghouse.com\/system-design-calculators\/\" },\r\n        { \"@type\": \"ListItem\", \"position\": 3, \"name\": \"Duct Size Calculator\", \"item\": 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Duct sizing refers to the calculation of the appropriate diameter for your system\u2019s ductwork based on how much air (measured in CFM) needs to be transported and at what velocity (measured in feet per minute, or FPM). 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