{"id":9730,"date":"2025-09-17T09:41:14","date_gmt":"2025-09-17T15:41:14","guid":{"rendered":"https:\/\/www.warmzone.com\/blog\/?post_type=glossary&p=9730"},"modified":"2025-09-17T09:41:15","modified_gmt":"2025-09-17T15:41:15","slug":"tubing-sizes","status":"publish","type":"glossary","link":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/","title":{"rendered":"Tubing Sizes"},"content":{"rendered":"

For most practical applications, two tubing sizes<\/span> are best. 7\/8″ Poly and 1\/2″ PEX offer the greatest flexibility. The 7\/8″ Poly provides the highest heat output (50 BTUs per ft.) and can be spaced 16″ on center. But a compromise is made when it comes to bending diameter. However, in a wide open slab environment, bending diameter is not a problem. In floor joists, spacing of 16″ on center or greater is the most practical use for the 7\/8″ size.
The 1\/2″ PEX (25 BTUs per ft.) can also be used in virtually any application, but it should be spaced 8″ on center. It will heat the same as the 7\/8″ Poly tubing, but you have to use twice as much of it. It can raise the cost of a radiant system substantially. However, 1\/2″ PEX has thicker walls, hence, a greater pressure and temperature rating. In high temperature applications it’s the best way to go. Its great durability is also ideal for snowmelt situations.<\/p>\n","protected":false},"excerpt":{"rendered":"

For most practical applications, two tubing sizes<\/span> are best. 7\/8″ Poly and 1\/2″ PEX offer the greatest flexibility. The 7\/8″ Poly provides the highest heat output (50 BTUs per ft.) and can be spaced 16″ on center. But a compromise is made when it comes to bending diameter. However, in a wide open slab environment,…<\/p>\n","protected":false},"author":1,"featured_media":0,"menu_order":0,"template":"","meta":{"footnotes":""},"class_list":["post-9730","glossary","type-glossary","status-publish","hentry","description-off"],"yoast_head":"\nTubing Sizes | Warmzone Blog<\/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.warmzone.com\/blog\/glossary\/tubing-sizes\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Tubing Sizes | Warmzone Blog\" \/>\n<meta property=\"og:description\" content=\"For most practical applications, two tubing sizes are best. 7\/8″ Poly and 1\/2″ PEX offer the greatest flexibility. The 7\/8″ Poly provides the highest heat output (50 BTUs per ft.) and can be spaced 16″ on center. But a compromise is made when it comes to bending diameter. However, in a wide open slab environment,…\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/\" \/>\n<meta property=\"og:site_name\" content=\"Warmzone Blog\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/WARMZONE\" \/>\n<meta property=\"article:modified_time\" content=\"2025-09-17T15:41:15+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:site\" content=\"@warmzone\" \/>\n<meta name=\"twitter:label1\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data1\" content=\"1 minute\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/\",\"url\":\"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/\",\"name\":\"Tubing Sizes | Warmzone Blog\",\"isPartOf\":{\"@id\":\"https:\/\/www.warmzone.com\/blog\/#website\"},\"datePublished\":\"2025-09-17T15:41:14+00:00\",\"dateModified\":\"2025-09-17T15:41:15+00:00\",\"breadcrumb\":{\"@id\":\"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.warmzone.com\/blog\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Tubing Sizes\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.warmzone.com\/blog\/#website\",\"url\":\"https:\/\/www.warmzone.com\/blog\/\",\"name\":\"Warmzone Blog\",\"description\":\"Premier Radiant Heat Solutions\",\"publisher\":{\"@id\":\"https:\/\/www.warmzone.com\/blog\/#organization\"},\"alternateName\":\"Warmzone\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.warmzone.com\/blog\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"en-US\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/www.warmzone.com\/blog\/#organization\",\"name\":\"Warmzone\",\"url\":\"https:\/\/www.warmzone.com\/blog\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"en-US\",\"@id\":\"https:\/\/www.warmzone.com\/blog\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/www.warmzone.com\/blog\/wp-content\/uploads\/2025\/06\/logo-2.png\",\"contentUrl\":\"https:\/\/www.warmzone.com\/blog\/wp-content\/uploads\/2025\/06\/logo-2.png\",\"width\":353,\"height\":56,\"caption\":\"Warmzone\"},\"image\":{\"@id\":\"https:\/\/www.warmzone.com\/blog\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/WARMZONE\",\"https:\/\/x.com\/warmzone\",\"https:\/\/www.instagram.com\/warmzoneradiantheat\/\",\"https:\/\/www.youtube.com\/channel\/UCsYnWv0JyW0SmsghXsiM1UQ\",\"https:\/\/www.linkedin.com\/company\/warmzone\/\",\"https:\/\/www.pinterest.com\/warmzone\/\"]}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Tubing Sizes | Warmzone Blog","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/","og_locale":"en_US","og_type":"article","og_title":"Tubing Sizes | Warmzone Blog","og_description":"For most practical applications, two tubing sizes are best. 7\/8″ Poly and 1\/2″ PEX offer the greatest flexibility. The 7\/8″ Poly provides the highest heat output (50 BTUs per ft.) and can be spaced 16″ on center. But a compromise is made when it comes to bending diameter. However, in a wide open slab environment,…","og_url":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/","og_site_name":"Warmzone Blog","article_publisher":"https:\/\/www.facebook.com\/WARMZONE","article_modified_time":"2025-09-17T15:41:15+00:00","twitter_card":"summary_large_image","twitter_site":"@warmzone","twitter_misc":{"Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/","url":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/","name":"Tubing Sizes | Warmzone Blog","isPartOf":{"@id":"https:\/\/www.warmzone.com\/blog\/#website"},"datePublished":"2025-09-17T15:41:14+00:00","dateModified":"2025-09-17T15:41:15+00:00","breadcrumb":{"@id":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/www.warmzone.com\/blog\/glossary\/tubing-sizes\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.warmzone.com\/blog\/"},{"@type":"ListItem","position":2,"name":"Tubing Sizes"}]},{"@type":"WebSite","@id":"https:\/\/www.warmzone.com\/blog\/#website","url":"https:\/\/www.warmzone.com\/blog\/","name":"Warmzone Blog","description":"Premier Radiant Heat Solutions","publisher":{"@id":"https:\/\/www.warmzone.com\/blog\/#organization"},"alternateName":"Warmzone","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.warmzone.com\/blog\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Organization","@id":"https:\/\/www.warmzone.com\/blog\/#organization","name":"Warmzone","url":"https:\/\/www.warmzone.com\/blog\/","logo":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/www.warmzone.com\/blog\/#\/schema\/logo\/image\/","url":"https:\/\/www.warmzone.com\/blog\/wp-content\/uploads\/2025\/06\/logo-2.png","contentUrl":"https:\/\/www.warmzone.com\/blog\/wp-content\/uploads\/2025\/06\/logo-2.png","width":353,"height":56,"caption":"Warmzone"},"image":{"@id":"https:\/\/www.warmzone.com\/blog\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/WARMZONE","https:\/\/x.com\/warmzone","https:\/\/www.instagram.com\/warmzoneradiantheat\/","https:\/\/www.youtube.com\/channel\/UCsYnWv0JyW0SmsghXsiM1UQ","https:\/\/www.linkedin.com\/company\/warmzone\/","https:\/\/www.pinterest.com\/warmzone\/"]}]}},"_links":{"self":[{"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/glossary\/9730","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/types\/glossary"}],"author":[{"embeddable":true,"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"version-history":[{"count":1,"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/glossary\/9730\/revisions"}],"predecessor-version":[{"id":9731,"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/glossary\/9730\/revisions\/9731"}],"wp:attachment":[{"href":"https:\/\/www.warmzone.com\/blog\/wp-json\/wp\/v2\/media?parent=9730"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}