{"id":57056,"date":"2026-09-29T16:06:46","date_gmt":"2026-09-29T15:06:46","guid":{"rendered":"https:\/\/ecoforest.com\/?p=57056"},"modified":"2026-09-29T16:06:46","modified_gmt":"2026-09-29T15:06:46","slug":"ductable-pellet-stoves-duct-planning-airflow-rates-and-installation-regulations","status":"publish","type":"post","link":"https:\/\/ecoforest.com\/en\/biomass\/pellets\/ducted-air-stoves\/ductable-pellet-stoves-duct-planning-airflow-rates-and-installation-regulations\/","title":{"rendered":"Ductable pellet stoves: duct planning, airflow rates and installation regulations"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong class=\"\"><a href=\"https:\/\/ecoforest.com\/en\/pellets\/ducted-air-stoves\/\" data-type=\"link\" data-id=\"https:\/\/ecoforest.com\/en\/pellets\/ducted-air-stoves\/\">Ductable pellet stoves<\/a><\/strong> have become an increasingly popular option for those looking to <strong class=\"\">distribute heat to several rooms from a single appliance<\/strong>, providing comfort, efficiency and significant energy savings. However, to make the most of their potential, it is essential to <strong class=\"\">plan the ducts correctly, calculate airflow rates and comply with current installation regulations in Spain<\/strong>.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">If you are still unsure which type of stove is right for you, start by reading our <a href=\"https:\/\/ecoforest.com\/en\/biomass\/pellets\/boilers\/types-of-pellet-stoves-and-their-differences-2\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/ecoforest.com\/en\/biomass\/pellets\/boilers\/types-of-pellet-stoves-and-their-differences-2\/\" rel=\"noreferrer noopener\"><strong class=\"\">Pellet stoves: a complete guide to choosing the best option<\/strong><\/a>. In this article, we will focus exclusively on <strong class=\"\">ductable models<\/strong>, designed for professional installations and multi-room projects.<\/p>\n<\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">When should you choose a ductable stove?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A ductable stove is ideal if:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>You want to heat <strong class=\"\">several rooms<\/strong> with a single appliance.<\/li>\n\n\n\n<li>You have a two-storey home or a home with a linear layout where a conventional appliance does not distribute enough heat.<\/li>\n\n\n\n<li>You want a more efficient option than electric radiators or a single split air-conditioning unit.<\/li>\n\n\n\n<li>You want to use your stove\u2019s heating capacity to replace several heating systems.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Compared with standard pellet stoves, ductable models include <strong class=\"\">additional fans<\/strong> and air outlets that allow heat to be delivered through <strong class=\"\">insulated ducts<\/strong> to adjoining rooms or even another floor.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ecoforest.com\/en\/pellets\/ducted-air-stoves\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"306\" src=\"https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1024x306.png\" alt=\"\" class=\"wp-image-50998\" title=\"\" srcset=\"https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1024x306.png 1024w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-300x90.png 300w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-768x230.png 768w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1536x459.png 1536w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-2048x612.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Calculating airflow rates and pressure losses<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To design a ducted installation, you need to consider two key factors:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong class=\"\">minimum hot-airflow rate<\/strong> required in each room:\n<ul class=\"wp-block-list\">\n<li>Small rooms (10\u201312 m\u00b2): 60\u201380 m\u00b3\/h.<\/li>\n\n\n\n<li>Living rooms or large spaces (25 m\u00b2+): 120\u2013150 m\u00b3\/h.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong class=\"\">Pressure losses in the ducts<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Each metre of \u00d880\u2013100 mm flexible duct causes <strong class=\"\">pressure losses<\/strong> that reduce the effective airflow rate.<\/li>\n\n\n\n<li>Bends and branches increase losses: the more complex the layout, the lower the usable airflow rate.<\/li>\n\n\n\n<li>Rule of thumb: do not exceed <strong class=\"\">6\u20137 equivalent metres<\/strong> per duct run unless additional fans are used.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong class=\"\">Practical example:<\/strong><br>A 10 kW ductable stove with an output of 200 m\u00b3\/h can direct <strong class=\"\">120 m\u00b3\/h to the living room + 80 m\u00b3\/h to a bedroom<\/strong>, provided the ducts are correctly sized and insulated.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Duct insulation<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Insulation is critical to preventing heat loss and noise:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Use <strong class=\"\">thermally insulated ducts<\/strong> (mineral wool, 25 mm covering).<\/li>\n\n\n\n<li>Avoid running ducts through uninsulated suspended ceilings.<\/li>\n\n\n\n<li>For outlets farther away, use <strong class=\"\">manually adjustable grilles<\/strong> to regulate the airflow rate in each room.<\/li>\n\n\n\n<li>Ensure that ducts do not pass through combustible elements without proper protection.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Installation regulations in Spain<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The installation of ductable pellet stoves is governed by <strong class=\"\"><a href=\"https:\/\/www.une.org\/encuentra-tu-norma\/busca-tu-norma\/norma?c=N0038408\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/www.une.org\/encuentra-tu-norma\/busca-tu-norma\/norma?c=N0038408\" rel=\"noreferrer noopener nofollow\">UNE-EN 14785<\/a><\/strong> and local flue gas evacuation and ventilation regulations.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Key requirements to meet:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong class=\"\">Flue<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Approved double-wall stainless steel pipe, with an outlet above the roof.<\/li>\n\n\n\n<li>Resistance to at least 200\u202f\u00b0C and an airtight seal to prevent condensation or flue gas leaks.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong class=\"\">Combustion air supply<\/strong>:\n<ul class=\"wp-block-list\">\n<li>An outside air intake (min. \u00d850\u201360 mm) is mandatory in rooms with a small volume.<\/li>\n\n\n\n<li>It prevents negative pressure in the room and ensures complete combustion.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong class=\"\">Air distribution ducts<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Maximum length and number of bends as specified by the manufacturer.<\/li>\n\n\n\n<li>Ducting into garages, bathrooms or areas with special risks is prohibited.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong class=\"\">Regional and municipal regulations<\/strong>: in some regions, installing a flue outlet through a fa\u00e7ade or roof requires notification of minor building work or a technical report.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Noise and maintenance<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong class=\"\">Noise:<\/strong> ductable stoves require more airflow than conventional models; however, good duct insulation and the use of rigid sections minimise vibrations. Modern Ecoforest fans operate at low noise levels (&lt;40 dB at rated load).<\/li>\n\n\n\n<li><strong class=\"\">Maintenance:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Clean the ash pan weekly.<\/li>\n\n\n\n<li>Inspect the air distribution ducts every six months for obstructions and dust.<\/li>\n\n\n\n<li>Have the flue cleaned annually by an authorised service technician.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Quick checklist for a ducted installation<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Initial assessment of floor area and number of rooms.<\/li>\n\n\n\n<li>Calculation of airflow rates (m\u00b3\/h per room).<\/li>\n\n\n\n<li>Insulated ducts and a usable length of \u22646\u20137 m.<\/li>\n\n\n\n<li>Adjustable grilles and system balancing.<\/li>\n\n\n\n<li>Flue and combustion air intake sized in accordance with UNE-EN 14785.<\/li>\n\n\n\n<li>Compliance with local regulations (minor works permit if the outlet passes through a fa\u00e7ade or roof).<\/li>\n\n\n\n<li>Annual maintenance plan.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/ecoforest.com\/en\/pellets\/ducted-air-stoves\/\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"277\" src=\"https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1-1024x277.png\" alt=\"\" class=\"wp-image-51006\" title=\"\" srcset=\"https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1-1024x277.png 1024w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1-300x81.png 300w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1-768x208.png 768w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1-1536x416.png 1536w, https:\/\/ecoforest.com\/wp-content\/uploads\/2025\/09\/image-1-2048x554.png 2048w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\"><strong class=\"\"><a href=\"https:\/\/ecoforest.com\/en\/pellets\/ducted-air-stoves\/\" data-type=\"link\" data-id=\"https:\/\/ecoforest.com\/en\/pellets\/ducted-air-stoves\/\">Ductable pellet stoves<\/a><\/strong> are an efficient and versatile solution for homes that need <strong class=\"\">multi-room heating from a single appliance<\/strong>. That said, the difference between a system that provides comfort and one that causes problems lies in <strong class=\"\">duct sizing, flue gas evacuation regulations and installation quality<\/strong>.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">At Ecoforest, we offer <strong class=\"\">ductable models designed for quiet operation, efficiency and safety<\/strong>, along with a network of professional installers who ensure regulatory compliance and genuine comfort.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Want to compare heating capacities and solutions? Visit our <a href=\"https:\/\/ecoforest.com\/en\/biomass\/pellets\/boilers\/types-of-pellet-stoves-and-their-differences-2\/\" target=\"_blank\" data-type=\"link\" data-id=\"https:\/\/ecoforest.com\/en\/biomass\/pellets\/boilers\/types-of-pellet-stoves-and-their-differences-2\/\" rel=\"noreferrer noopener\"><strong class=\"\">complete guide to pellet stoves<\/strong><\/a> and take the next step towards sustainable, efficient heating suited to your home.<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ductable pellet stoves have become an increasingly popular option for those looking to distribute heat to several rooms from a single appliance, providing comfort, efficiency and significant energy savings. However, to make the most of their potential, it is essential to plan the ducts correctly, calculate airflow rates and comply with current installation regulations in [&hellip;]<\/p>\n","protected":false},"author":17,"featured_media":32373,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[68,62],"tags":[],"class_list":["post-57056","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-ducted-air-stoves"],"acf":[],"featured_image_src_large":["https:\/\/ecoforest.com\/wp-content\/uploads\/2021\/07\/estufa-pellets-aire-boloniaa-1024x485.jpg",1024,485,true],"author_info":{"display_name":"Seo Funnel cracks","author_link":"https:\/\/ecoforest.com\/en\/author\/seo-funnel-cracks\/"},"comment_info":0,"category_info":[{"term_id":68,"name":"Blog","slug":"news","term_group":0,"term_taxonomy_id":68,"taxonomy":"category","description":"","parent":0,"count":231,"filter":"raw","cat_ID":68,"category_count":231,"category_description":"","cat_name":"Blog","category_nicename":"news","category_parent":0},{"term_id":62,"name":"Ductable pellet stoves","slug":"ducted-air-stoves","term_group":0,"term_taxonomy_id":62,"taxonomy":"category","description":"","parent":108,"count":15,"filter":"raw","cat_ID":62,"category_count":15,"category_description":"","cat_name":"Ductable pellet stoves","category_nicename":"ducted-air-stoves","category_parent":108}],"tag_info":false,"taxonomy_info":{"category":[{"value":68,"label":"Blog"},{"value":62,"label":"Ductable pellet stoves"}]},"_links":{"self":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts\/57056","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/users\/17"}],"replies":[{"embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/comments?post=57056"}],"version-history":[{"count":1,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts\/57056\/revisions"}],"predecessor-version":[{"id":57057,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/posts\/57056\/revisions\/57057"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/media\/32373"}],"wp:attachment":[{"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/media?parent=57056"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/categories?post=57056"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ecoforest.com\/en\/wp-json\/wp\/v2\/tags?post=57056"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}