{"id":17803,"date":"2025-06-25T05:30:07","date_gmt":"2025-06-25T10:30:07","guid":{"rendered":"https:\/\/www.galmicheandsons.com\/hvac-blog\/?p=17803"},"modified":"2025-10-08T03:48:15","modified_gmt":"2025-10-08T08:48:15","slug":"how-to-size-a-mini-split-ac-for-garage","status":"publish","type":"post","link":"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/","title":{"rendered":"How to Size a Mini Split AC for Garage or Workshop"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#Why_Mini_Split_ACs_Are_Ideal_for_Garages_and_Workshops\" >Why Mini Split ACs Are Ideal for Garages and Workshops<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#Factors_to_Consider_When_Sizing_a_Mini_Split_for_Your_Garage\" >Factors to Consider When Sizing a Mini Split for Your Garage<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#1_Square_Footage\" >1. Square Footage<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#2_Ceiling_Height\" >2. Ceiling Height<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#3_Insulation_Quality\" >3. Insulation Quality<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#4_Sun_Exposure\" >4. Sun Exposure<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#5_Appliances_and_Equipment\" >5. Appliances and Equipment<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#BTU_Guidelines_for_Garages_and_Workshops\" >BTU Guidelines for Garages and Workshops<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#FAQs_Mini_Split_Sizing_for_Garages\" >FAQs: Mini Split Sizing for Garages<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/#Get_the_Right-Sized_Mini_Split_for_Your_St_Louis_Garage\" >Get the Right-Sized Mini Split for Your St. Louis Garage<\/a><\/li><\/ul><\/nav><\/div>\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/how-to-size-a-mini-split-ac-for-garage-1-300x234.jpg\" alt=\"How to Size a Mini Split AC for Garage or Workshop\" width=\"300\" height=\"234\" class=\"alignright size-medium wp-image-17836\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/how-to-size-a-mini-split-ac-for-garage-1-300x234.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/how-to-size-a-mini-split-ac-for-garage-1.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><p>Whether you&#8217;re upgrading your garage to a full-blown workshop or home gym or simply want a more comfortable space to work on projects, installing a ductless mini split air conditioner is one of the smartest solutions for efficient, targeted cooling. But before you buy, there&#8217;s a crucial step you cannot skip, proper sizing. So how do you size a mini split AC for your garage?<\/p>\r\n<p>At Galmiche &#038; Sons, we&#8217;ve helped hundreds of homeowners in the St. Louis area find the perfect HVAC solution for every space in their home, including utility areas like garages. In this guide, we break down how to size a mini split AC for a garage or workshop, helping you avoid costly mistakes and get the comfort you deserve.<\/p>\r\n<p>To learn more about <a href=\"https:\/\/www.galmicheandsons.com\/air-conditioner-sizing.html\">air conditioner sizing<\/a> and request a quote for your new HVAC system, contact our St. Louis HVAC experts today.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"Why_Mini_Split_ACs_Are_Ideal_for_Garages_and_Workshops\"><\/span>Why Mini Split ACs Are Ideal for Garages and Workshops<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Traditional central air systems typically don&#8217;t extend into garages, and window units aren&#8217;t always a practical or effective choice. A ductless mini split system offers flexible, energy-efficient cooling without the need for ductwork. They&#8217;re compact, quiet, and easy to zone, making them perfect for single spaces like:<\/p>\r\n<ul>\r\n<li>1-car or 2-car garages<\/li>\r\n<li>Detached workshops<\/li>\r\n<li>Converted studios or home gyms<\/li>\r\n<li>Hobby or crafting spaces<\/li>\r\n<\/ul>\r\n<p>But even the best mini split system will underperform if it&#8217;s not correctly sized for the space.<\/p>\r\n<p>Not sure if a ductless mini split is right for you? Learn more <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/tips-to-cool-your-garage-this-summer\/\">tips to cool your garage<\/a>.<\/p>\r\n<img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/how-to-size-a-mini-split-ac-for-garage-2-300x200.jpg\" alt=\"Factors to Consider When Sizing a Mini Split for Your Garage\" width=\"300\" height=\"200\" class=\"alignright size-medium wp-image-17837\" srcset=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/how-to-size-a-mini-split-ac-for-garage-2-300x200.jpg 300w, https:\/\/www.galmicheandsons.com\/hvac-blog\/wp-content\/uploads\/how-to-size-a-mini-split-ac-for-garage-2.jpg 600w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><h2><span class=\"ez-toc-section\" id=\"Factors_to_Consider_When_Sizing_a_Mini_Split_for_Your_Garage\"><\/span>Factors to Consider When Sizing a Mini Split for Your Garage<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Sizing a mini split ac for your garage isn&#8217;t just about square footage. Garages are unique environments with characteristics that dramatically affect how much cooling power you&#8217;ll need.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"1_Square_Footage\"><\/span>1. Square Footage<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Start by measuring the length and width of your garage. Multiply to get the total square footage. A standard 1-car garage is about 200\u2013300 sq. ft., while a 2-car garage can range from 400\u2013600 sq. ft.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"2_Ceiling_Height\"><\/span>2. Ceiling Height<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Higher ceilings mean more air volume, which requires additional BTUs. Be sure to factor in ceiling height if it exceeds the standard 8 feet.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"3_Insulation_Quality\"><\/span>3. Insulation Quality<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Garages are often poorly insulated. Uninsulated walls or garage doors allow heat to enter and escape quickly, meaning you&#8217;ll need a more powerful unit. If you haven&#8217;t upgraded insulation, consider it before installation to reduce your BTU needs.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"4_Sun_Exposure\"><\/span>4. Sun Exposure<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>Does your garage face west and bake in the afternoon sun? Does it have windows? Sun exposure and heat gain from concrete floors or metal doors will require higher capacity to keep the space cool.<\/p>\r\n<h3><span class=\"ez-toc-section\" id=\"5_Appliances_and_Equipment\"><\/span>5. Appliances and Equipment<span class=\"ez-toc-section-end\"><\/span><\/h3>\r\n<p>If your workshop includes power tools, compressors, or even a refrigerator, these generate heat and should be considered when calculating BTU needs.<\/p>\r\n<h2><span class=\"ez-toc-section\" id=\"BTU_Guidelines_for_Garages_and_Workshops\"><\/span>BTU Guidelines for Garages and Workshops<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Here are rough BTU estimates for garage mini splits based on common sizes and usage:<\/p>\r\n<table class=\"table\">\r\n<tr>\r\n<td>\r\n<strong>Garage Size<\/strong><\/td>\r\n<strong>BTU Estimate<\/strong><\/td>\r\n<\/tr>\r\n<tr>\r\n<td>200\u2013300 sq. ft. (1-car, insulated)<\/td>\r\n<td>6,000\u20139,000 BTU<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>400\u2013600 sq. ft. (2-car, insulated)<\/td>\r\n<td>12,000\u201318,000 BTU<\/td>\r\n<\/tr>\r\n<tr>\r\n<td>600+ sq. ft. (workshop, uninsulated)<\/td>\r\n<td>18,000\u201324,000 BTU<\/td>\r\n<\/tr>\r\n<\/table>\r\n<p>These are general ranges. For accurate results, Galmiche &#038; Sons performs a load calculation to match your unique space to the right system.<\/p>\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"FAQs_Mini_Split_Sizing_for_Garages\"><\/span>FAQs: Mini Split Sizing for Garages<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-68e6254f8714a\"><strong class=\"schema-faq-question\">How do I know if my garage needs insulation before installing a mini split?<\/strong> <p class=\"schema-faq-answer\">If your garage is drafty or subject to extreme temperature swings, we recommend insulating walls and garage doors first. It will improve efficiency and reduce the size of the system needed.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e6254f87175\"><strong class=\"schema-faq-question\">Can I use the same size mini split I have in a bedroom?<\/strong> <p class=\"schema-faq-answer\">Not always. Garages tend to have more heat gain and lack insulation, meaning they often require more BTUs for the same square footage.<\/p><\/div> <div class=\"schema-faq-section\" id=\"faq-question-68e6254f8718d\"><strong class=\"schema-faq-question\">What happens if I install a unit that&#8217;s too small or too big?<\/strong> <p class=\"schema-faq-answer\">An undersized unit will run constantly without achieving comfort. An oversized unit may short cycle, wearing out faster and failing to manage humidity effectively.<\/p><\/div> <\/div>\n\r\n<hr>\r\n<h2><span class=\"ez-toc-section\" id=\"Get_the_Right-Sized_Mini_Split_for_Your_St_Louis_Garage\"><\/span>Get the Right-Sized Mini Split for Your St. Louis Garage<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n<p>Don&#8217;t let discomfort ruin your workspace. Whether you&#8217;re building a home gym, creating a woodworking shop, or just want a cool garage for summer, Galmiche &#038; Sons is here to help.<\/p>\r\n<p>With decades of experience serving homeowners throughout St. Louis, we specialize in ductless <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/mini-split-air-conditioner-installation-guide\/\">mini split air conditioner installation<\/a> and custom sizing consultations. We&#8217;ll evaluate your garage, consider all performance factors, and recommend a properly sized unit that keeps your space cool and efficient.<\/p>\r\n<p><strong>Contact Galmiche &#038; Sons today<\/strong> to schedule a free consultation and get the expert help you need to size and install the perfect mini split system for your garage or workshop.<\/p>","protected":false},"excerpt":{"rendered":"<p>Whether you&#8217;re upgrading your garage to a full-blown workshop or home gym or simply want a more comfortable space to work on projects, installing a ductless mini split air conditioner is one of the smartest solutions for efficient, targeted cooling. But before you buy, there&#8217;s a crucial step you cannot skip, proper sizing. So how do you size a mini split AC for your garage? At Galmiche &#038; Sons, we&#8217;ve helped hundreds of homeowners in the St. Louis area find &hellip; <a href=\"https:\/\/www.galmicheandsons.com\/hvac-blog\/how-to-size-a-mini-split-ac-for-garage\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">How to Size a Mini Split AC for Garage or Workshop<\/span><\/a><\/p>\n","protected":false},"author":6,"featured_media":17836,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_mbp_gutenberg_autopost":false,"footnotes":""},"categories":[9,13,5,16,55,38,47],"tags":[],"class_list":["post-17803","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-air-conditioner-sizing","category-air-conditioner-tips","category-air-conditioners","category-air-condtioner-selection","category-buying-guides","category-heating-cooling-faqs","category-mini-split-systems"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>How to Size a Mini Split AC for Garage | St. Louis HVAC Tips<\/title>\n<meta name=\"description\" content=\"Learn the essential steps to size a mini split AC for your garage or workshop. 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