{"id":21031,"date":"2022-08-17T08:25:31","date_gmt":"2022-08-17T08:25:31","guid":{"rendered":"https:\/\/thetibble.com\/?p=21031"},"modified":"2023-08-03T21:52:24","modified_gmt":"2023-08-03T21:52:24","slug":"furnace-clearance-guide","status":"publish","type":"post","link":"https:\/\/thetibble.com\/furnace-clearance-guide\/","title":{"rendered":"Furnace Clearance Guide (Walls, floor, ceiling)"},"content":{"rendered":"<style>img#mv-trellis-img-1::before{padding-top:25%; }img#mv-trellis-img-1{display:block;}img#mv-trellis-img-2::before{padding-top:72.9%; }img#mv-trellis-img-2{display:block;}img#mv-trellis-img-3::before{padding-top:72.9%; }img#mv-trellis-img-3{display:block;}img#mv-trellis-img-4::before{padding-top:72.9%; }img#mv-trellis-img-4{display:block;}<\/style>\n<p>A furnace is a crucial part of HVAC systems, so it is essential to know how to install one in your home. A major part of this is that the large heating appliance must be clear of certain materials to keep it safe. Now, if you are attempting to find the clearance &ldquo;rules&rdquo; for furnaces, you may be having some trouble. <\/p>\n\n\n\n<p>The manufacturer&rsquo;s knowledge takes precedence for clearances, which means the information is very scattered. I have done some research for you to give you a better idea of common furnace clearance practices across a few brands.<\/p>\n\n\n<div class=\"lazyblock-nutshell-Z1SWCLC wp-block-lazyblock-nutshell\"><p class=\"has-text-align-left has-text-color has-background\" style=\"background-color:#e7d1b1;color:#575f60;font-size:18px\"><noscript><img loading=\"lazy\" decoding=\"async\" width=\"200\" height=\"50\" class=\"wp-image-3497\" style=\"width: 200px;\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11.png\" alt=\"\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11.png 600w, https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11-300x75.png 300w\" sizes=\"(max-width: 200px) 100vw, 200px\"><\/noscript><img loading=\"eager\" decoding=\"async\" width=\"200\" height=\"50\" class=\"wp-image-3497 eager-load\" style=\"width: 200px;\" src=\"data:image\/svg+xml,%3Csvg%20xmlns='http:\/\/www.w3.org\/2000\/svg'%20viewBox='0%200%20200%2050'%3E%3Crect%20width='200'%20height='50'%20style='fill:%23e3e3e3'\/%3E%3C\/svg%3E\" alt=\"\" sizes=\"(max-width: 200px) 100vw, 200px\" data-pin-media=\"https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11.png\" id=\"mv-trellis-img-1\" data-src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11.png.webp\" data-srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11.png.webp 600w, https:\/\/thetibble.com\/wp-content\/uploads\/2021\/08\/nutshell1-11-300x75.png.webp 300w\" data-svg=\"1\" data-trellis-processed=\"1\"><br><strong>Furnace clearances differ slightly according to different manufacturers and the way the appliance is installed. Always check the individual instructions provided with the furnace. In general, there are relatively standard clearances or ranges across several furnace brands (0-6\"). <\/strong> <\/p><\/div>\n\n\n<h2 class=\"wp-block-heading\">Why Are Clearances Important?<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Fire Safety<\/h3>\n\n\n\n<p>Clearances are included in appliance manuals and the International Residential Code (IRC) because these are distances designed to keep you safe. Furnace clearances refer to the minimum distance that the appliance must be from any flammable materials.<\/p>\n\n\n\n<p>Furnaces are appliances that generate heat, often by burning fuel. The heat and combustion involved in the operation mean the risk of fires around the machine is higher.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"729\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it.jpg\" alt=\"Gray modern floor furnace with ducts and wires attached to it\" class=\"wp-image-21638\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it.jpg 1000w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-300x219.jpg 300w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-768x560.jpg 768w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-735x536.jpg 735w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-335x244.jpg 335w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-347x253.jpg 347w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-520x379.jpg 520w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-640x467.jpg 640w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-960x700.jpg 960w\" sizes=\"(max-width: 760px) calc(100vw - 24px), 720px\"><\/noscript><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"729\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it.jpg.webp\" alt=\"Gray modern floor furnace with ducts and wires attached to it\" class=\"wp-image-21638 lazyload\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it.jpg.webp 1000w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-300x219.jpg.webp 300w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-768x560.jpg.webp 768w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-735x536.jpg.webp 735w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-335x244.jpg.webp 335w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-347x253.jpg.webp 347w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-520x379.jpg.webp 520w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-640x467.jpg.webp 640w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it-960x700.jpg.webp 960w\" sizes=\"(max-width: 760px) calc(100vw - 24px), 720px\" data-pin-media=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Gray-modern-floor-furnace-with-ducts-and-wires-attached-to-it.jpg\" id=\"mv-trellis-img-2\" data-trellis-processed=\"1\"><\/figure>\n\n\n\n<p>The manufacturer-determined clearances are the distances that are considered safe for combustible materials to be around the furnace. This helps prevent sudden ignition if heat builds up in the vicinity.<\/p>\n\n\n\n<p>While there is risk associated with the appliance, if you follow the standards for safety, you can significantly decrease the chances. For example, provided you comply with the IRC regulations, you can safely install a <a href=\"https:\/\/thetibble.com\/can-you-put-furnace-in-crawl-space\/\">furnace in a crawl space<\/a>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Accessibility<\/h3>\n\n\n\n<p>Part of keeping large household appliances safe, especially those generating large quantities of heat, is maintaining them.<\/p>\n\n\n\n<p>To properly maintain your furnace, like all other appliances, you need enough room to clean, inspect, repair, and replace something on the appliance. This helps keep the furnace functioning optimally for longer, and decreases the likelihood of fires and breaking down.<\/p>\n\n\n\n<p>For example, you need to be able to regularly inspect and clean or replace the filter on the furnace. This keeps dust away from the combustion site, which helps prevent the ignition of particles. This is also why the <a href=\"https:\/\/thetibble.com\/dryer-vent-clearance-furnace-intake-code\/\">furnace intake must be clear of dryer vents<\/a>.<\/p>\n\n\n\n<p>These <a href=\"https:\/\/thetibble.com\/basement-hot-winter-cool-save-energy\/#Check_Furnace_Filter_Is_Clean\">filters will fill up<\/a>, and this will restrict airflow into the furnace. When not enough air can get in, this increases how hard the furnace works to pull air in and heat it, which can cause overheating as there is not enough air for the heat to spread through.<\/p>\n\n\n\n<p>Additionally, <a href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-13-general-mechanical-system-requirements#IRC2021P2_Pt05_Ch13_SecM1305.1\" target=\"_blank\" rel=\"noreferrer noopener\">Section M1305.1<\/a> of the IRC requires that no permanent constructions, other appliances, or any ducting connected to the appliance need to be removed to access an appliance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What The IRC Says<\/h2>\n\n\n\n<p>The IRC, <a rel=\"noreferrer noopener\" href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-14-heating-and-cooling-equipment-and-appliances#IRC2021P2_Pt05_Ch14_SecM1402.2\" target=\"_blank\">Section M1402.2<\/a>, says that your <strong>central furnace<\/strong> clearances must follow its listing and installation instructions from the manufacturer.<\/p>\n\n\n\n<p>There are so many different brands and models of appliances like furnaces that it would be inefficient to have each product listed in the IRC. <\/p>\n\n\n\n<p>This is why the IRC relies on the safety and performance-based listing (or rating) codes provided by approved external organizations, mainly the Underwriters Laboratories (UL) and American National Standards Institute (ANSI).<\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>Central Furnace<\/strong><\/td><td><strong>Listing<\/strong> (<a href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-14-heating-and-cooling-equipment-and-appliances#IRC2021P2_Pt05_Ch14_SecM1402.1\" target=\"_blank\" rel=\"noreferrer noopener\">Section M1402.1<\/a>)<\/td><\/tr><tr><td>Oil-fired<\/td><td>UL 727 ANSI 727<\/td><\/tr><tr><td>Electric<\/td><td>UL 1995 UL\/CSA\/ANCE 60335-2-40<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>You can also see the Canadian Standards Association (CSA) and the Association of Standardization and Certification (ANCE) mentioned in the IRC.<\/p>\n\n\n\n<p>Vented <strong>floor furnaces<\/strong> are also required to be installed according to their listing and manufacturer instruction, as per <a rel=\"noreferrer noopener\" href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-14-heating-and-cooling-equipment-and-appliances#IRC2021P2_Pt05_Ch14_SecM1408.2\" target=\"_blank\">Section M1408.2<\/a> of the IRC. <\/p>\n\n\n\n<figure class=\"wp-block-table is-style-stripes\"><table><tbody><tr><td><strong>Vented Floor Furnace<\/strong><\/td><td><strong>Listing<\/strong><\/td><\/tr><tr><td>Oil-fired<\/td><td>UL 729<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"729\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace.jpg\" alt=\"Hand opening the vented floor furnace\" class=\"wp-image-21640\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace.jpg 1000w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-300x219.jpg 300w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-768x560.jpg 768w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-735x536.jpg 735w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-335x244.jpg 335w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-347x253.jpg 347w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-520x379.jpg 520w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-640x467.jpg 640w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-960x700.jpg 960w\" sizes=\"(max-width: 760px) calc(100vw - 24px), 720px\"><\/noscript><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"729\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace.jpg.webp\" alt=\"Hand opening the vented floor furnace\" class=\"wp-image-21640 lazyload\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace.jpg.webp 1000w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-300x219.jpg.webp 300w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-768x560.jpg.webp 768w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-735x536.jpg.webp 735w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-335x244.jpg.webp 335w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-347x253.jpg.webp 347w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-520x379.jpg.webp 520w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-640x467.jpg.webp 640w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace-960x700.jpg.webp 960w\" sizes=\"(max-width: 760px) calc(100vw - 24px), 720px\" data-pin-media=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Hand-opening-the-vented-floor-furnace.jpg\" id=\"mv-trellis-img-3\" data-trellis-processed=\"1\"><\/figure>\n\n\n\n<p>The manufacturers are the experts on their products. Therefore, provided the product is verified by the safety organizations, the IRC entrusts the best installation practice to the manufacturer&rsquo;s knowledge.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Gas Furnaces<\/h3>\n\n\n\n<p>Many furnaces on the market are, in fact, gas-powered. Information on central-heating gas furnaces can be found in <a href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-24-fuel-gas#IRC2021P2_Pt06_Ch24_SecG2409.4\" target=\"_blank\" rel=\"noreferrer noopener\">Section G2409.4<\/a> of the IRC, which might be more relevant to your search.<\/p>\n\n\n\n<p>Gas furnace installation should also follow manufacturer clearance instructions, per <a rel=\"noreferrer noopener\" href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-24-fuel-gas#IRC2021P2_Pt06_Ch24_SecG2409.4.1\" target=\"_blank\">Section G2309.4.1<\/a>, although the IRC (<a rel=\"noreferrer noopener\" href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P2\/chapter-24-fuel-gas#IRC2021P2_Pt06_Ch24_SecG2409.4.5\" target=\"_blank\">Section G2409.4.5<\/a>) specifies that sufficient servicing clearance is required. <\/p>\n\n\n\n<p>This means that you need at least a 24&Prime; clearance in front of the appliance to allow easy access for cleaning and servicing, which are important for gas appliance functionality.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Defining Central and Floor Vent Furnaces<\/h3>\n\n\n\n<p>Furnaces are the HVAC appliance that provides heated air to your home. However, different types of furnaces perform slightly differently.<\/p>\n\n\n\n<p>Central furnaces are the kind involved in your central heating system. This kind of furnace distributes warm air to your whole house.<\/p>\n\n\n\n<p>Floor furnaces are level to the ground floor of a house. They are generally stored in a small room and use the natural rising of heat to disperse warmth. These are more room specific than central furnaces and considered less effective.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Furnace Clearances<\/h2>\n\n\n\n<p>As I mentioned earlier, many different brands make furnaces. So, I will look at the most common clearances, or typical ranges, for several popular brands (as of 2022):<\/p>\n\n\n\n<ul><li>Bryant<\/li><li>Daikin<\/li><li>Goodman<\/li><li>Rheem<\/li><li>Trane<\/li><\/ul>\n\n\n\n<p class=\"has-text-align-center\">\n    <a data-amazonimages=\"\" target=\"_blank\" title=\"Goodman 80,000 BTU 96% Efficiency Upflow, Horizontal Gas Furnace Model GMES960803BN\" href=\"https:\/\/www.amazon.com\/dp\/B07YLVYG7P?tag=hvacbuzz-20\" rel=\"nofollow noopener\"><noscript><img decoding=\"async\" class=\"size-large aligncenter\" src=\"https:\/\/m.media-amazon.com\/images\/I\/41YGhhjfstL._SL500_.jpg\" alt=\"Goodman 80,000 BTU 96% Efficiency Upflow, Horizontal Gas Furnace Model GMES960803BN\" title=\"Goodman 80,000 BTU 96% Efficiency Upflow, Horizontal Gas Furnace Model GMES960803BN\"><\/noscript><img decoding=\"async\" class=\"size-large aligncenter lazyload\" src=\"https:\/\/m.media-amazon.com\/images\/I\/41YGhhjfstL._SL500_.jpg\" alt=\"Goodman 80,000 BTU 96% Efficiency Upflow, Horizontal Gas Furnace Model GMES960803BN\" title=\"Goodman 80,000 BTU 96% Efficiency Upflow, Horizontal Gas Furnace Model GMES960803BN\" data-mvt-skip=\"src\" loading=\"lazy\" data-trellis-processed=\"1\"><\/a>\n<\/p>\n\n\n\n<p>For these clearance measurements, you will need to measure the distance between the combustible material surface and the appropriate face or fixture on the furnace unit.<\/p>\n\n\n\n<p><em>Note: Please check the clearance instructions for the specific model you are looking at, as there is some variation despite frequent uniformity in the distances.<\/em><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Wall Clearances<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Brand<\/strong><\/td><td><strong>Orientation<\/strong><\/td><td><strong>Minimum Side Clearance<\/strong><\/td><td>**<strong>Minimum Front Clearance<\/strong><\/td><td><strong>Minimum Rear Clearance<\/strong><\/td><\/tr><tr><td>Bryant<\/td><td>Vertical<\/td><td>0-1&rdquo;<\/td><td>1-3&rdquo;<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Bryant<\/td><td>Horizontal<\/td><td>0-1&rdquo;<\/td><td>1-3&rdquo;<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Daikin<\/td><td>Vertical<\/td><td>0&rdquo;<\/td><td>3&rdquo;<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Daikin<\/td><td>Horizontal<\/td><td>6&rdquo;<\/td><td>3&rdquo;<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Goodman<\/td><td>Vertical<\/td><td>0-1&rdquo;<\/td><td>3&rdquo;<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Goodman<\/td><td>Horizontal<\/td><td>6&rdquo;<\/td><td>3&rdquo;<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Rheem<\/td><td>Vertical<\/td><td>*0-4&rdquo;<\/td><td>3&rdquo;<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Rheem<\/td><td>Horizontal<\/td><td>*0-4&rdquo;<\/td><td>3&rdquo;<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Trane<\/td><td>Vertical<\/td><td>0&rdquo;<\/td><td>3&rdquo;<\/td><td>0-1&rdquo;<\/td><\/tr><tr><td>Trane<\/td><td>Horizontal<\/td><td>0-1&rdquo;<\/td><td>3&rdquo;<\/td><td>1-6&rdquo;<\/td><\/tr><\/tbody><\/table><figcaption>*Side that requires more space for the Rheem furnaces depends on installation orientation.<br>**Minimum of 24&rdquo; frontal clearance required for servicing. While the listed frontal clearances are the minimum for safety, most brands recommend installing the furnaces with the 24&Prime; clearance required for servicing.<\/figcaption><\/figure>\n\n\n\n<p>As you can see, there are general guidelines for the clearance around the furnace. This can help if you are trying to size a space before your shopping (or moving) begins.<\/p>\n\n\n\n<p>The side clearances can be influenced by vent placement, but those particulars are contained in the installation manual for the individual models.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Floor Clearances<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Brand<\/strong><\/td><td><strong>Orientation<\/strong><\/td><td><strong>Minimum Bottom Clearance<\/strong><\/td><\/tr><tr><td>Bryant<\/td><td>Vertical<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Bryant<\/td><td>Horizontal<\/td><td>0-1&rdquo;<\/td><\/tr><tr><td>Daikin<\/td><td>Vertical<\/td><td>Not specified<\/td><\/tr><tr><td>Daikin<\/td><td>Horizontal<\/td><td>Not specified<\/td><\/tr><tr><td>Goodman<\/td><td>Vertical<\/td><td>Not specified<\/td><\/tr><tr><td>Goodman<\/td><td>Horizontal<\/td><td>Not specified<\/td><\/tr><tr><td>Rheem<\/td><td>Vertical<\/td><td>Not specified<\/td><\/tr><tr><td>Rheem<\/td><td>Horizontal<\/td><td>Not specified<\/td><\/tr><tr><td>Trane<\/td><td>Vertical<\/td><td>0&rdquo;<\/td><\/tr><tr><td>Trane<\/td><td>Horizontal<\/td><td>0&rdquo;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>Goodman and Daikin furnaces come with instructions regarding appropriate flooring materials instead of stating a floor clearance. Each series\/appliance has instructions indicating if they can be installed on wood floors or may only be on non-combustible floors.<\/p>\n\n\n\n<p>However, it is always safer to install a furnace on non-combustible flooring. Additionally, you should keep d&eacute;cor items like rugs a few feet from the appliance.<\/p>\n\n\n\n<p>Floor furnaces must comply with the following location requirements, according to <a rel=\"noreferrer noopener\" href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P1\/chapter-14-heating-and-cooling-equipment-and-appliances#IRC2021P1_Pt05_Ch14_SecM1408.3\" target=\"_blank\">Section<br>M1408.3<\/a>:<\/p>\n\n\n\n<ul><li>It must be at least 6&rdquo; from a wall.<\/li><li>The furnace&rsquo;s wall registers must be at least 6&rdquo; from the adjoining wall at the inside corners.<\/li><li>The furnace&rsquo;s register must be at least 12&rdquo; from doors (in any position), curtains or draperies, and other combustible materials and items.<\/li><li>The register must also be at least 5&rsquo; below combustible materials.<\/li><li>The burner assembly must not project onto the underfloor area of occupied space.<\/li><li>It must not be installed on a graded concrete floor construction.<\/li><li>It must not be installed where a door opens within 12&rdquo; of the grille opening.<\/li><\/ul>\n\n\n\n<p>Section M1408.4 states that there must be an opening (at least 18&rdquo; by 24&rdquo;) or trap door (22&rdquo; by 30&rdquo; or bigger) providing access to the furnace. It is also important that you have sufficient space in the opening and passageways around the furnace to replace any part of the appliance.<\/p>\n\n\n\n<p>The installation of a floor furnace is managed by the requirements in <a href=\"https:\/\/codes.iccsafe.org\/content\/IRC2021P1\/chapter-14-heating-and-cooling-equipment-and-appliances#IRC2021P1_Pt05_Ch14_SecM1408.5\" target=\"_blank\" rel=\"noreferrer noopener\">Section M1408.5<\/a> of the IRC:<\/p>\n\n\n\n<ul><li>The furnace thermostat must be in the same room as the furnace register.<\/li><li>It must be supported independently to the floor register.<\/li><li>It must be at least 6&rdquo; from the ground, or minimum 2&rdquo; above ground when the lower 6&rdquo; of the furnace are sealed against water.<\/li><li>If installation requires excavation, this must extend 30&rdquo; beyond the control side and 12&rdquo; beyond the other sides. The excavation must also be sloped outward (and upward) from the base to the surrounding grade without exceeding 45&deg; from the horizontal line.<\/li><li>It must not be supported from the ground.<\/li><\/ul>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"729\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance.jpg\" alt=\"Illustration of a metal floor furnace with floor clearance\" class=\"wp-image-21641\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance.jpg 1000w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-300x219.jpg 300w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-768x560.jpg 768w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-735x536.jpg 735w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-335x244.jpg 335w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-347x253.jpg 347w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-520x379.jpg 520w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-640x467.jpg 640w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-960x700.jpg 960w\" sizes=\"(max-width: 760px) calc(100vw - 24px), 720px\"><\/noscript><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"729\" src=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance.jpg.webp\" alt=\"Illustration of a metal floor furnace with floor clearance\" class=\"wp-image-21641 lazyload\" srcset=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance.jpg.webp 1000w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-300x219.jpg.webp 300w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-768x560.jpg.webp 768w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-735x536.jpg.webp 735w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-335x244.jpg.webp 335w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-347x253.jpg.webp 347w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-520x379.jpg.webp 520w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-640x467.jpg.webp 640w, https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance-960x700.jpg.webp 960w\" sizes=\"(max-width: 760px) calc(100vw - 24px), 720px\" data-pin-media=\"https:\/\/thetibble.com\/wp-content\/uploads\/2022\/08\/Illustration-of-a-metal-floor-furnace-with-clearance.jpg\" id=\"mv-trellis-img-4\" data-trellis-processed=\"1\"><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Ceiling Clearances<\/h3>\n\n\n\n<p>The ceiling clearance of a furnace is better known as a top clearance. This is measured from the top of the casing. The top clearance of a furnace can be influenced by installation orientation (like with Daikin and Goodman), and it can also be affected by where vents are on the appliance.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Brand<\/strong><\/td><td><strong>Orientation<\/strong><\/td><td><strong>Minimum Top Clearance<\/strong><\/td><\/tr><tr><td>Bryant<\/td><td>Vertical<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Bryant<\/td><td>Horizontal<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Daikin<\/td><td>Vertical<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Daikin<\/td><td>Horizontal<\/td><td>6&rdquo;<\/td><\/tr><tr><td>Goodman<\/td><td>Vertical<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Goodman<\/td><td>Horizontal<\/td><td>6&rdquo;<\/td><\/tr><tr><td>Rheem<\/td><td>Vertical<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Rheem<\/td><td>Horizontal<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Trane<\/td><td>Vertical<\/td><td>1&rdquo;<\/td><\/tr><tr><td>Trane<\/td><td>Horizontal<\/td><td>1&rdquo;<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<figure class=\"wp-block-pullquote\"><blockquote><p>As furnaces are not the prettiest of household appliances, you will be glad to know that <a href=\"https:\/\/thetibble.com\/furnace-can-enclosed\/\">enclosing them is possible<\/a>, provided the enclosure meets the IRC requirements, and there are a <a href=\"https:\/\/thetibble.com\/tips-safely-hide-furnace-water-heater\/\">number of ways to hide the furnace to make it look much better<\/a>. <\/p><\/blockquote><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Sources<\/h2>\n\n\n\n<p><a href=\"https:\/\/www.houzz.com\/discussions\/2434040\/difference-in-furnace-and-central-heating\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.houzz.com\/discussions\/2434040\/difference-in-furnace-and-central-heating<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/russellsac.com\/why-you-should-replace-your-old-floor-furnace\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/russellsac.com\/why-you-should-replace-your-old-floor-furnace\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.familyhandyman.com\/article\/best-furnace-brands\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.familyhandyman.com\/article\/best-furnace-brands\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.denversbestheatingandacrepair.com\/top-10-furnace-brands-of-2022\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.denversbestheatingandacrepair.com\/top-10-furnace-brands-of-2022\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/homeinspectioninsider.com\/furnace-brands-to-avoid\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/homeinspectioninsider.com\/furnace-brands-to-avoid\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.goodmanmfg.com\/pdfviewer.aspx?pdfurl=docs\/librariesprovider6\/default-document-library\/ss-gcvc9638fe520022fa6258827eff0c00754798.pdf?view=true\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.goodmanmfg.com\/pdfviewer.aspx?pdfurl=docs\/librariesprovider6\/default-document-library\/ss-gcvc9638fe520022fa6258827eff0c00754798.pdf?view=true<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.goodmanmfg.com\/pdfviewer.aspx?pdfurl=docs\/librariesprovider6\/default-document-library\/ss-gm9s92.pdf?view=true\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.goodmanmfg.com\/pdfviewer.aspx?pdfurl=docs\/librariesprovider6\/default-document-library\/ss-gm9s92.pdf?view=true<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.trane.com\/content\/dam\/Trane\/Commercial\/global\/products-systems\/equipment\/unitary\/split-systems\/Small%20Splits\/Furnaces\/18-CE01D1-1E-EN_11112016.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.trane.com\/content\/dam\/Trane\/Commercial\/global\/products-systems\/equipment\/unitary\/split-systems\/Small%20Splits\/Furnaces\/18-CE01D1-1E-EN_11112016.pdf<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.homereference.net\/furnace-air-flow-configuration\/\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.homereference.net\/furnace-air-flow-configuration\/<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/backend.daikincomfort.com\/docs\/default-source\/product-documents\/residential\/specifications\/ss-dm96vc.pdf?sfvrsn=edb12c26_17&amp;_gl=1*1c1r467*_ga*MTQ4MDU2Nzc1NC4xNjYwMjA4NTY3*_ga_MXJ05EZJZT*MTY2MDIwODU2Ny4xLjEuMTY2MDIwODg1NC4w&amp;_ga=2.216815390.927370740.1660208567-1480567754.1660208567\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/backend.daikincomfort.com\/docs\/default-source\/product-documents\/residential\/specifications\/ss-dm96vc.pdf?sfvrsn=edb12c26_17&amp;_gl=1*1c1r467*_ga*MTQ4MDU2Nzc1NC4xNjYwMjA4NTY3*_ga_MXJ05EZJZT*MTY2MDIwODU2Ny4xLjEuMTY2MDIwODg1NC4w&amp;_ga=2.216815390.927370740.1660208567-1480567754.1660208567<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/backend.daikincomfort.com\/docs\/default-source\/product-documents\/residential\/specifications\/ss-dc96tn.pdf?sfvrsn=b61c2126_8&amp;_gl=1*1mh5mb4*_ga*MTQ4MDU2Nzc1NC4xNjYwMjA4NTY3*_ga_MXJ05EZJZT*MTY2MDIwODU2Ny4xLjEuMTY2MDIwOTYwNi4w&amp;_ga=2.184251310.927370740.1660208567-1480567754.1660208567\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/backend.daikincomfort.com\/docs\/default-source\/product-documents\/residential\/specifications\/ss-dc96tn.pdf?sfvrsn=b61c2126_8&amp;_gl=1*1mh5mb4*_ga*MTQ4MDU2Nzc1NC4xNjYwMjA4NTY3*_ga_MXJ05EZJZT*MTY2MDIwODU2Ny4xLjEuMTY2MDIwOTYwNi4w&amp;_ga=2.184251310.927370740.1660208567-1480567754.1660208567<\/a><\/p>\n\n\n\n<p><a href=\"http:\/\/pts.myrheem.com\/docstore\/webdocs\/Public\/ServicePublic\/Trouble2a\/pdfs\/Gas_Furnace\/IO\/(-)98V_92-24161-159_Rev_1.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">http:\/\/pts.myrheem.com\/docstore\/webdocs\/Public\/ServicePublic\/Trouble2a\/pdfs\/Gas_Furnace\/IO\/(-)98V_92-24161-159_Rev_1.pdf<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/s3.amazonaws.com\/WebPartners\/ProductDocuments\/656E7BD0-B936-40D0-92D8-3FB427A6973F.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/s3.amazonaws.com\/WebPartners\/ProductDocuments\/656E7BD0-B936-40D0-92D8-3FB427A6973F.pdf<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/s3.amazonaws.com\/WebPartners\/ProductDocuments\/54A98673-30E3-45AA-947C-D964FC352885.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/s3.amazonaws.com\/WebPartners\/ProductDocuments\/54A98673-30E3-45AA-947C-D964FC352885.pdf<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.manualslib.com\/manual\/457907\/Bryant-355aav.html?page=5#manual\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.manualslib.com\/manual\/457907\/Bryant-355aav.html?page=5#manual<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.manualslib.com\/manual\/829346\/Bryant-987ma.html?page=6#manual\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.manualslib.com\/manual\/829346\/Bryant-987ma.html?page=6#manual<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.questargas.com\/ForEmployees\/qgcOperationsTraining\/Furnaces\/Trane_TUH2_TDH2_AUH2_ADH2.pdf\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.questargas.com\/ForEmployees\/qgcOperationsTraining\/Furnaces\/Trane_TUH2_TDH2_AUH2_ADH2.pdf<\/a><\/p>\n\n\n\n<p><a href=\"https:\/\/www.riversideheatingandair.com\/blog\/2-dangerous-furnace-problems-and-how-to-prevent-them\" target=\"_blank\" rel=\"noreferrer noopener\">https:\/\/www.riversideheatingandair.com\/blog\/2-dangerous-furnace-problems-and-how-to-prevent-them<\/a><\/p>\n\n\n\n<p>\n    <a data-amazonimages=\"\" target=\"_blank\" title=\"Rheem Ruud Weather King, RGP Mid Efficiency, Conquest 800 Furnace Draft Inducer Blower FB-RFB241\" href=\"https:\/\/www.amazon.com\/dp\/B0012C2J54?tag=hvacbuzz-20\" rel=\"nofollow noopener\"><noscript><img decoding=\"async\" class=\"size-large aligncenter\" src=\"https:\/\/m.media-amazon.com\/images\/I\/51af07Be9UL._SL500_.jpg\" alt=\"Rheem Ruud Weather King, RGP Mid Efficiency, Conquest 800 Furnace Draft Inducer Blower FB-RFB241\" title=\"Rheem Ruud Weather King, RGP Mid Efficiency, Conquest 800 Furnace Draft Inducer Blower FB-RFB241\"><\/noscript><img decoding=\"async\" class=\"size-large aligncenter lazyload\" src=\"https:\/\/m.media-amazon.com\/images\/I\/51af07Be9UL._SL500_.jpg\" alt=\"Rheem Ruud Weather King, RGP Mid Efficiency, Conquest 800 Furnace Draft Inducer Blower FB-RFB241\" title=\"Rheem Ruud Weather King, RGP Mid Efficiency, Conquest 800 Furnace Draft Inducer Blower FB-RFB241\" data-mvt-skip=\"src\" loading=\"lazy\" data-trellis-processed=\"1\"><\/a>\n<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A furnace is a crucial part of HVAC systems, so it is essential to know how to install one in your home. A major part of this is that the &hellip;<\/p>\n","protected":false},"author":59,"featured_media":21637,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_themeisle_gutenberg_block_has_review":false,"disable-in-feed":false,"article-schema-type":"","disable-critical-css":false,"footnotes":""},"categories":[464,9],"tags":[261],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v22.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Furnace Clearance Guide (Walls, floor, ceiling) - The Tibble<\/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:\/\/thetibble.com\/furnace-clearance-guide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Furnace Clearance Guide (Walls, floor, ceiling) - The Tibble\" \/>\n<meta property=\"og:description\" content=\"A furnace is a crucial part of HVAC systems, so it is essential to know how to install one in your home. 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