{"product_id":"thermosphere-heating-foil-kit-140w-c-w-overlay-underlay","title":"ThermoSphere Heating Foil Kit 140W c\/w Overlay \u0026 Underlay","description":"\u003cp\u003eThe ThermoSphere Heating Foil Kit is a complete, award-winning dry-lay electric underfloor heating system for wood, carpet and vinyl floor finishes, supplied with the cushioning underlay and overlay boards needed for a full installation in one kit.\u003c\/p\u003e\n\u003ch3\u003eKey Benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e140W\/m² aluminium fibre heating foil with exposed cable loops for easy installation\u003c\/li\u003e\n\u003cli\u003eKit includes matched cushioning underlay and overlay boards — nothing extra to source\u003c\/li\u003e\n\u003cli\u003eContinuous earth sheath, no separate earth tapes or connections required\u003c\/li\u003e\n\u003cli\u003eSimple loose-lay installation process, ideal for renovation projects\u003c\/li\u003e\n\u003cli\u003eAdds up to 19dB of impact sound reduction underfoot\u003c\/li\u003e\n\u003cli\u003eIP68 rated and suitable for bathrooms and kitchens\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cp\u003eDesigned for dry installation beneath engineered wood, carpet, laminate and vinyl floor finishes in bedrooms, living rooms, kitchens and bathrooms where a wet tile bed isn't being used.\u003c\/p\u003e\n\u003ch3\u003ePerformance \u0026amp; Features\u003c\/h3\u003e\n\u003cp\u003eThe foil conducts heat evenly across the floor while the cushioning underlay and overlay improve underfoot comfort, protect the foil and cables from wear, and add acoustic insulation between floors.\u003c\/p\u003e\n\u003ch3\u003eCompatibility\u003c\/h3\u003e\n\u003cp\u003eRequires a compatible ThermoSphere thermostat, such as the T-MO, for control. HDF Overlay Boards are recommended in addition for floor finishes other than engineered timber 10mm or thicker.\u003c\/p\u003e\n\u003cp\u003eSupplied by Millcot as part of our full ThermoSphere underfloor heating range.\u003c\/p\u003e\u003ch3\u003eDownloads\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0621\/5794\/7096\/files\/ThermoSphere_Foil_Data_Sheet_2026.pdf?v=1786482316\" target=\"_blank\" rel=\"noopener\"\u003eThermoSphere Heating Foil Data Sheet (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0621\/5794\/7096\/files\/Foil_Instructions_2026.pdf?v=1786482317\" target=\"_blank\" rel=\"noopener\"\u003eThermoSphere Heating Foil Installation Instructions (PDF)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFAQs\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat floor finishes is this suitable for?\u003c\/strong\u003e\u003cbr\u003eEngineered wood, carpet, laminate and vinyl. For finishes other than engineered timber 10mm+, also fit HDF Overlay Boards (WCVF-HDFO).\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat's included in the kit?\u003c\/strong\u003e\u003cbr\u003eThe heating foil mat plus matched cushioning underlay and overlay boards for the stated coverage area.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need a thermostat separately?\u003c\/strong\u003e\u003cbr\u003eYes, a compatible thermostat such as the ThermoSphere T-MO is required and sold separately.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan this go under tiles?\u003c\/strong\u003e\u003cbr\u003eFoil systems are designed for dry-lay finishes; for tiled floors, use the ThermoSphere Mesh or Ultimate cable\/membrane systems instead.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs it safe in bathrooms?\u003c\/strong\u003e\u003cbr\u003eYes, the foil is IP68 rated, though always follow zone requirements for electrical installations in bathrooms.\u003c\/p\u003e","brand":"ThermoSphere","offers":[{"title":"1.0m²","offer_id":58162637144447,"sku":"HFK-140-0100","price":59.99,"currency_code":"GBP","in_stock":true},{"title":"1.5m²","offer_id":58162637177215,"sku":"HFK-140-0150","price":79.99,"currency_code":"GBP","in_stock":true},{"title":"2.0m²","offer_id":58162637209983,"sku":"HFK-140-0200","price":104.99,"currency_code":"GBP","in_stock":true},{"title":"2.5m²","offer_id":58162637242751,"sku":"HFK-140-0250","price":132.99,"currency_code":"GBP","in_stock":true},{"title":"3.0m²","offer_id":58162637275519,"sku":"HFK-140-0300","price":157.99,"currency_code":"GBP","in_stock":true},{"title":"4.0m²","offer_id":58162637308287,"sku":"HFK-140-0400","price":209.99,"currency_code":"GBP","in_stock":true},{"title":"5.0m²","offer_id":58162637341055,"sku":"HFK-140-0500","price":262.99,"currency_code":"GBP","in_stock":true},{"title":"6.0m²","offer_id":58162637373823,"sku":"HFK-140-0600","price":312.99,"currency_code":"GBP","in_stock":true},{"title":"7.0m²","offer_id":58162637406591,"sku":"HFK-140-0700","price":365.99,"currency_code":"GBP","in_stock":true},{"title":"8.0m²","offer_id":58162637439359,"sku":"HFK-140-0800","price":418.99,"currency_code":"GBP","in_stock":true},{"title":"9.0m²","offer_id":58162637472127,"sku":"HFK-140-0900","price":469.99,"currency_code":"GBP","in_stock":true},{"title":"10.0m²","offer_id":58162637504895,"sku":"HFK-140-1000","price":521.99,"currency_code":"GBP","in_stock":true},{"title":"12.0m²","offer_id":58162637537663,"sku":"HFK-140-1200","price":625.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0621\/5794\/7096\/files\/5bb89a9b-83b9-46a8-b5ca-21baac38ce76.jpg?v=1786529159","url":"https:\/\/www.millcot.com\/products\/thermosphere-heating-foil-kit-140w-c-w-overlay-underlay","provider":"MILLCOT","version":"1.0","type":"link"}