{"id":18241,"date":"2025-07-17T18:02:38","date_gmt":"2025-07-17T12:32:38","guid":{"rendered":"https:\/\/www.jbsagolf.com\/blogs\/?p=18241"},"modified":"2025-10-04T09:58:56","modified_gmt":"2025-10-04T09:58:56","slug":"mini-split-or-window-ac-which-is-more-energy-efficient","status":"publish","type":"post","link":"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/","title":{"rendered":"Mini Split or Window AC: Which Is More Energy-Efficient?"},"content":{"rendered":"<p><span style=\"font-weight: 400;\">With rising electricity bills and growing concern for energy usage, many homeowners are asking: Which cooling option is more efficient\u2014a small window AC or a mini split AC unit?<\/span><i><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/i><span style=\"font-weight: 400;\">Each system offers its own advantages, but when it comes to energy efficiency, the difference can be significant depending on your space and usage habits.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">If you\u2019re considering a<\/span><a href=\"http:\/\/dellahome.com\/collections\/window-ac\"> <b>small window AC<\/b><\/a><span style=\"font-weight: 400;\"> for a compact room or a<\/span><a href=\"https:\/\/dellahome.com\/pages\/mini-split-ac\"> <b>mini split AC unit<\/b><\/a><span style=\"font-weight: 400;\"> for broader, long-term use, this guide will help you understand which option suits your needs better\u2014and saves you more over time.<\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 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\" style=\"cursor:inherit\">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 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#What_Is_a_Small_Window_AC\" >What Is a Small Window AC?<\/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.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#What_Is_a_Mini_Split_AC_Unit\" >What Is a Mini Split AC Unit?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Energy_Efficiency_Comparison\" >Energy Efficiency Comparison<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Efficiency_Metrics\" >Efficiency Metrics:<\/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.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Power_Usage\" >Power Usage:<\/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.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Result\" >Result:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#When_a_Small_Window_AC_Is_the_Smarter_Choice\" >When a Small Window AC Is the Smarter Choice<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#When_a_Mini_Split_AC_Unit_Is_Worth_the_Investment\" >When a Mini Split AC Unit Is Worth the Investment<\/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.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Cost_vs_Efficiency_Tradeoff\" >Cost vs Efficiency Tradeoff<\/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.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Environmental_Considerations\" >Environmental Considerations<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Final_Verdict_Which_One_Should_You_Choose\" >Final Verdict: Which One Should You Choose?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Small_Window_AC\"><\/span><b>What Is a Small Window AC?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A <\/span><b>small window air conditioner<\/b><span style=\"font-weight: 400;\"> is a self-contained cooling unit designed to fit into a window frame. It pulls in warm air from the room, cools it using refrigerant, and circulates the cooled air back while expelling hot air outside.\u00a0<\/span><\/p>\n<p><span style=\"font-weight: 400;\">These units are especially common in:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Dorm rooms<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Rental apartments<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Guest rooms<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Temporary living situations<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/li>\n<\/ul>\n<p><b>Pros:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Affordable upfront cost<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Easy to install (DIY-friendly)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Compact and portable<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/li>\n<\/ul>\n<p><b>Cons:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Blocks natural light and air from the window<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Limited cooling coverage<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Typically noisier than other options<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Less energy-efficient over time<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"What_Is_a_Mini_Split_AC_Unit\"><\/span><b>What Is a Mini Split AC Unit?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A <\/span><b>mini split AC unit<\/b><span style=\"font-weight: 400;\"> is a ductless cooling and heating system composed of an outdoor compressor and one or more indoor air handlers. The two units are connected via small refrigerant and power lines through the wall, allowing efficient temperature control in designated zones.<\/span><\/p>\n<p><b>Pros:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Higher energy efficiency (especially inverter models)<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Zoned cooling for one or multiple rooms<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Sleek, quiet operation<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Doesn\u2019t block windows or require ductwork<\/span><\/li>\n<\/ul>\n<p><b>Cons:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Higher initial cost<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Requires professional installation<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">May be excessive for very small or temporary spaces<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Energy_Efficiency_Comparison\"><\/span><b>Energy Efficiency Comparison<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">When evaluating energy performance, the two systems show clear differences:<\/span><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Efficiency_Metrics\"><\/span><b>Efficiency Metrics:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">EER (Energy Efficiency Ratio) and SEER (Seasonal Energy Efficiency Ratio) are the primary indicators.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Small window AC units<\/b><span style=\"font-weight: 400;\"> usually range from 8 to 12 EER.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Mini split AC units<\/b><span style=\"font-weight: 400;\">, particularly inverter models, often exceed SEER ratings of 16\u201323.<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Power_Usage\"><\/span><b>Power Usage:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Window ACs are simple on\/off systems\u2014they use full power each cycle.<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Mini splits with inverter technology adjust power to match demand, reducing energy waste.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Result\"><\/span><b>Result:<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><span style=\"font-weight: 400;\">Over an extended period, <\/span><b>mini split AC units<\/b><span style=\"font-weight: 400;\"> consume significantly less electricity, especially in regions with long cooling seasons.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"When_a_Small_Window_AC_Is_the_Smarter_Choice\"><\/span><b>When a Small Window AC Is the Smarter Choice<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">Despite lower efficiency, a <\/span><b>small window AC<\/b><span style=\"font-weight: 400;\"> might still be the better option in certain cases:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b>Short-term use<\/b><span style=\"font-weight: 400;\">: Renting a room for a year or less? Window AC is easy to install and remove.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Small space<\/b><span style=\"font-weight: 400;\">: If you\u2019re cooling a room under 300 square feet, a 5,000\u20138,000 BTU window unit may be sufficient.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Low upfront budget<\/b><span style=\"font-weight: 400;\">: These units can cost as little as $150\u2013$300.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>DIY installation<\/b><span style=\"font-weight: 400;\">: No drilling, wiring, or mounting required.<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"When_a_Mini_Split_AC_Unit_Is_Worth_the_Investment\"><\/span><b>When a Mini Split AC Unit Is Worth the Investment<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">In scenarios where cooling efficiency and long-term value are the priority, a <\/span><b>mini split AC unit<\/b><span style=\"font-weight: 400;\"> offers compelling benefits:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b>Larger rooms or multiple zones<\/b><span style=\"font-weight: 400;\">: Covers more space with fewer losses.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Heating and cooling combo<\/b><span style=\"font-weight: 400;\">: Useful in both summer and winter.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Quiet and seamless<\/b><span style=\"font-weight: 400;\">: Ideal for bedrooms, nurseries, or home offices.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Smart control options<\/b><span style=\"font-weight: 400;\">: Many models include remote or app control.<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Though initial costs range from $700\u2013$2,000+ (including installation), the savings in electricity over 5\u201310 years typically justify the investment.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cost_vs_Efficiency_Tradeoff\"><\/span><b>Cost vs Efficiency Tradeoff<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<tbody>\n<tr>\n<td><b>Feature<\/b><\/td>\n<td><b>Small Window AC<\/b><\/td>\n<td><b>Mini Split AC Unit<\/b><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Initial Cost<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Low (~$200\u2013$400)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Medium to High (~$700\u2013$2000)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Installation<\/span><\/td>\n<td><span style=\"font-weight: 400;\">DIY<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Professional required<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Energy Efficiency (SEER)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Low to Moderate (8\u201312)<\/span><\/td>\n<td><span style=\"font-weight: 400;\">High (16\u201323+)<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Electricity Usage<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Higher over time<\/span><\/td>\n<td><span style=\"font-weight: 400;\">Lower with inverter tech<\/span><\/td>\n<\/tr>\n<tr>\n<td><span style=\"font-weight: 400;\">Lifespan<\/span><\/td>\n<td><span style=\"font-weight: 400;\">5\u20138 years<\/span><\/td>\n<td><span style=\"font-weight: 400;\">10\u201315 years<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Environmental_Considerations\"><\/span><b>Environmental Considerations<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">A system\u2019s environmental impact isn\u2019t only about refrigerants\u2014energy usage plays a major role.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><b>Mini split AC units<\/b><span style=\"font-weight: 400;\">:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Use less electricity overall<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Often use eco-friendly refrigerants like R-410A<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Operate quietly, reducing noise pollution<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Can be integrated into solar systems more effectively<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/li>\n<\/ul>\n<p><b>Small window ACs<\/b><span style=\"font-weight: 400;\">, while compact, tend to use more power per hour and may require replacement sooner, increasing long-term waste.<\/span><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Final_Verdict_Which_One_Should_You_Choose\"><\/span><b>Final Verdict: Which One Should You Choose?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">There&#8217;s no universal winner\u2014your choice depends on your space, budget, and priorities.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">Choose a <\/span><b>small window AC<\/b><span style=\"font-weight: 400;\"> if:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">You\u2019re cooling a small room temporarily<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">You\u2019re renting or want a plug-and-play solution<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Upfront cost is the biggest concern<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Choose a <\/span><b>mini split AC unit<\/b><span style=\"font-weight: 400;\"> if:<\/span><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">You want long-term savings on energy bills<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">You need to cool larger or multiple spaces efficiently<\/span><\/li>\n<li style=\"font-weight: 400;\"><span style=\"font-weight: 400;\">Comfort, noise level, and aesthetics matter<\/span><\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><b>Conclusion<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><span style=\"font-weight: 400;\">When comparing energy efficiency, the <\/span><b>mini split AC unit<\/b><span style=\"font-weight: 400;\"> comes out ahead, especially over time. However, <\/span><b>small window AC<\/b><span style=\"font-weight: 400;\"> units still serve an important purpose in certain living situations.<\/span><\/p>\n<p><span style=\"font-weight: 400;\">For short-term or budget-limited scenarios, a compact window unit can do the job. But if you\u2019re ready to invest in a longer-term, energy-efficient cooling system, it\u2019s worth exploring a<\/span> <b>mini split AC unit<\/b><span style=\"font-weight: 400;\"> solution that aligns with your goals.<\/span><span style=\"font-weight: 400;\"><br \/>\n<\/span><span style=\"font-weight: 400;\"> And if you&#8217;re curious about entry-level cooling options, you can still find a range of<\/span> <b>small window AC models<\/b><span style=\"font-weight: 400;\"> to consider.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>With rising electricity bills and growing concern for energy usage, many homeowners are asking: Which cooling option is more efficient\u2014a small window AC or a mini split AC unit? Each [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":38034,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[12],"tags":[],"class_list":["post-18241","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Mini Split or Window AC: Which Is More Energy-Efficient? - JBSA Golf<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.jbsagolf.com\/blogs\/mini-split-or-window-ac-which-is-more-energy-efficient\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Mini Split or Window AC: Which Is More Energy-Efficient? - JBSA Golf\" \/>\n<meta property=\"og:description\" content=\"With rising electricity bills and growing concern for energy usage, many homeowners are asking: Which cooling option is more efficient\u2014a small window AC or a mini split AC unit? 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