{"product_id":"carbon-smart-indoor-sauna-kit-7x7x8-thermo-poplar","title":"Carbon Smart Indoor Sauna Kit | 7' x 7' x 8' | Thermo Poplar","description":"\u003csection class=\"product-intro\"\u003e\n\u003cp\u003eThe Carbon Smart™ Indoor Sauna Kit (7’ x 7’ x 8’) is a complete interior sauna package designed for homeowners and contractors who want a high-quality, custom-fit sauna without sourcing components separately. Built with thermally modified Thermo Poplar throughout, this kit arrives with all interior components precisely cut to your room dimensions. You supply the framing, insulation, electrical wiring, and exterior wall covering — we supply everything inside. Choose your accessory package and optional Harvia 8kW heater at checkout to configure the kit that fits your space and budget.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-why-choose\"\u003e\n\u003ch2\u003eWhy Customers Choose the Carbon Smart™ 7x7x8 Sauna Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eComplete interior kit — all components are pre-cut to your 7’ x 7’ x 8’ room dimensions\u003c\/li\u003e\n\u003cli\u003eThermo Poplar wood throughout: dimensionally stable, humidity-resistant, chemical-free treatment\u003c\/li\u003e\n\u003cli\u003eAll-glass sauna door with wood handles and trim included\u003c\/li\u003e\n\u003cli\u003eChoice of accessory packages: bench skirting, LED under-bench lighting, or both\u003c\/li\u003e\n\u003cli\u003eSix optional Harvia 8kW heater bundles available at checkout — built-in control or WiFi models\u003c\/li\u003e\n\u003cli\u003eSuitable for DIY installation or professional contractor builds\u003c\/li\u003e\n\u003cli\u003eDesigned and supplied by Finnish Sauna Builders, specialists in custom indoor sauna systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-highlights\"\u003e\n\u003ch2\u003eProduct Highlights\u003c\/h2\u003e\n\n\u003cdiv class=\"highlight-item\"\u003e\n\u003ch3 class=\"highlight-icon highlight-icon--wood\"\u003eThermo Poplar Interior Wood\u003c\/h3\u003e\n\u003cp\u003eThermo Poplar is a sustainably sourced wood thermally modified at approximately 374°F using a chemical-free process. The treatment enhances dimensional stability and resistance to humidity and temperature fluctuations, producing a warm, rich tone well-suited to sauna environments.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"highlight-item\"\u003e\n\u003ch3 class=\"highlight-icon highlight-icon--kit\"\u003ePre-Cut Interior Components\u003c\/h3\u003e\n\u003cp\u003eEvery board, molding, and panel in this kit is cut to fit your 7’ x 7’ x 8’ room. You frame and insulate the space; the kit handles the interior finish from wall boards to ceiling to benches.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"highlight-item\"\u003e\n\u003ch3 class=\"highlight-icon highlight-icon--door\"\u003eAll-Glass Sauna Door\u003c\/h3\u003e\n\u003cp\u003eThe included all-glass door features wood handles and trim, with a frame measuring 27.2” x 78.7” (690 x 2000 mm) and a required rough opening of 28” x 80”. It provides a clean, modern look while maintaining proper sauna heat retention.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"highlight-item\"\u003e\n\u003ch3 class=\"highlight-icon highlight-icon--bench\"\u003eConfigurable Bench Layout\u003c\/h3\u003e\n\u003cp\u003eMultiple bench configurations are available and shown in the product images. Each uses 20”-deep clear Thermo Poplar bench boards with supports, custom-built to your chosen layout.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"highlight-item\"\u003e\n\u003ch3 class=\"highlight-icon highlight-icon--accessories\"\u003eOptional Accessory Packages\u003c\/h3\u003e\n\u003cp\u003eUpgrade your kit with bench skirting for a finished look, LED under-bench lighting for ambiance, or the Luxury Package that includes both. All accessories are matched to the Thermo Poplar finish.\u003c\/p\u003e\n\u003c\/div\u003e\n\n\u003cdiv class=\"highlight-item\"\u003e\n\u003ch3 class=\"highlight-icon highlight-icon--heater\"\u003eSix Optional Harvia 8kW Heater Bundles\u003c\/h3\u003e\n\u003cp\u003eSelect from six Harvia 8kW heater options at checkout — ranging from built-in control models (KIP80B, Cilindro PC80) to WiFi-enabled models (KIP80W, Cilindro PC80E, Spirit, Virta) — each with heater stones included. The Virta also includes a safety railing.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-whats-included\"\u003e\n\u003ch2\u003eWhat’s Included in the Kit\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFoil vapor barrier for moisture protection\u003c\/li\u003e\n\u003cli\u003eErgonomic backrests\u003c\/li\u003e\n\u003cli\u003e1x4 tongue-and-groove wall and ceiling boards in Thermo Poplar\u003c\/li\u003e\n\u003cli\u003eClear 1x4 bench boards with supports (20” deep) in Thermo Poplar — custom-built to your chosen configuration\u003c\/li\u003e\n\u003cli\u003eCorner moldings for walls, ceiling, and baseboards in Thermo Poplar\u003c\/li\u003e\n\u003cli\u003eAll-glass sauna door with wood handles and trim (frame: 27.2” x 78.7”; glass: 24.4” x 77.3”; rough opening: 28” x 80”)\u003c\/li\u003e\n\u003cli\u003eDuckboard flooring for walk area in Thermo Poplar\u003c\/li\u003e\n\u003cli\u003eUpper and lower vent grills for air circulation\u003c\/li\u003e\n\u003cli\u003eTraditional sauna bucket with liner and ladle\u003c\/li\u003e\n\u003cli\u003eSauna thermometer\u003c\/li\u003e\n\u003cli\u003eHeadrest\u003c\/li\u003e\n\u003cli\u003eMarine-grade, wall-mount, vapor-proof sauna light\u003c\/li\u003e\n\u003cli\u003eDetailed installation instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cem\u003eFraming, insulation, electrical wiring, and exterior wall covering are not included and must be supplied on-site.\u003c\/em\u003e\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-specifications\"\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\n\u003ctable class=\"specs-table\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eRoom Dimensions\u003c\/th\u003e\n\u003ctd\u003e7’ x 7’ x 8’ (W x D x H)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Ceiling Height\u003c\/th\u003e\n\u003ctd\u003e8 feet\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eInterior Wood\u003c\/th\u003e\n\u003ctd\u003eThermo Poplar (thermally modified, chemical-free)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWall \u0026amp; Ceiling Boards\u003c\/th\u003e\n\u003ctd\u003e1x4 tongue-and-groove, horizontal run (seam added if width exceeds 8 ft)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBench Depth\u003c\/th\u003e\n\u003ctd\u003e20 inches\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDoor Frame Size\u003c\/th\u003e\n\u003ctd\u003e27.2” x 78.7” (690 x 2000 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDoor Glass Size\u003c\/th\u003e\n\u003ctd\u003e24.4” x 77.3” (620 x 1963 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDoor Frame Thickness\u003c\/th\u003e\n\u003ctd\u003e1.65” x 3.6” (42 x 92 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRough Opening Required\u003c\/th\u003e\n\u003ctd\u003e28” x 80”\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eWood Type Option\u003c\/th\u003e\n\u003ctd\u003eThermo Poplar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAccessory Options\u003c\/th\u003e\n\u003ctd\u003eNo Accessories \/ Bench Skirting \/ LED Under-Bench Lighting \/ Luxury Package (Skirting + LED)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeater Options\u003c\/th\u003e\n\u003ctd\u003eNo Heater \/ Harvia KIP80B 8kW \/ Harvia Cilindro PC80 8kW \/ Harvia KIP80W 8kW WiFi \/ Harvia Cilindro PC80E 8kW WiFi \/ Harvia Spirit 8kW WiFi \/ Harvia Virta 8kW WiFi with Railing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eShipping Weight\u003c\/th\u003e\n\u003ctd\u003e800 lbs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eProduct Type\u003c\/th\u003e\n\u003ctd\u003eCustom Indoor Sauna Kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eVendor\u003c\/th\u003e\n\u003ctd\u003eFinnish Sauna Builders\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-heater-comparison\"\u003e\n\u003ch2\u003eHeater Option Comparison\u003c\/h2\u003e\n\u003cp\u003eAll heater options include heater stones. WiFi models add app-based remote control and scheduling. Select the model that best matches your control preferences and budget.\u003c\/p\u003e\n\u003ctable class=\"specs-table sauna-comparison-table\"\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eKIP80B 8kW\u003c\/th\u003e\n\u003cth\u003eCilindro PC80 8kW\u003c\/th\u003e\n\u003cth\u003eKIP80W 8kW WiFi\u003c\/th\u003e\n\u003cth\u003eCilindro PC80E 8kW WiFi\u003c\/th\u003e\n\u003cth\u003eSpirit 8kW WiFi\u003c\/th\u003e\n\u003cth\u003eVirta 8kW WiFi\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003ePower Output\u003c\/td\u003e\n\u003ctd\u003e8 kW\u003c\/td\u003e\n\u003ctd\u003e8 kW\u003c\/td\u003e\n\u003ctd\u003e8 kW\u003c\/td\u003e\n\u003ctd\u003e8 kW\u003c\/td\u003e\n\u003ctd\u003e8 kW\u003c\/td\u003e\n\u003ctd\u003e8 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003eControl Type\u003c\/td\u003e\n\u003ctd\u003eBuilt-in\u003c\/td\u003e\n\u003ctd\u003eBuilt-in\u003c\/td\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003ctd\u003eWiFi\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003eWiFi \/ App Control\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003eHeater Stones Included\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003eSafety Railing Included\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003eDesign Series\u003c\/td\u003e\n\u003ctd\u003eKIP (wall-mount)\u003c\/td\u003e\n\u003ctd\u003eCilindro (cylindrical)\u003c\/td\u003e\n\u003ctd\u003eKIP (wall-mount)\u003c\/td\u003e\n\u003ctd\u003eCilindro (cylindrical)\u003c\/td\u003e\n\u003ctd\u003eSpirit\u003c\/td\u003e\n\u003ctd\u003eVirta (wall-mount)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd class=\"sauna-feature-label\"\u003eRemote Control\u003c\/td\u003e\n\u003ctd\u003eManual only\u003c\/td\u003e\n\u003ctd\u003eManual only\u003c\/td\u003e\n\u003ctd\u003eApp-based\u003c\/td\u003e\n\u003ctd\u003eApp-based\u003c\/td\u003e\n\u003ctd\u003eApp-based\u003c\/td\u003e\n\u003ctd\u003eApp-based\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003cdiv class=\"sauna-key-differences\"\u003e\n\u003ch3\u003eKey Differences at a Glance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eAll six models\u003c\/strong\u003e share the same 8 kW output and include heater stones\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBuilt-in control (no WiFi):\u003c\/strong\u003e Harvia KIP80B and Cilindro PC80 — straightforward manual operation\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi app control:\u003c\/strong\u003e Harvia KIP80W, Cilindro PC80E, Spirit, and Virta — remote temperature and timer management via smartphone\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCylindrical design with large stone capacity:\u003c\/strong\u003e Cilindro PC80 and PC80E\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSafety railing included:\u003c\/strong\u003e Harvia Virta only — the only model in this lineup with a protective railing\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePremium WiFi wall-mount:\u003c\/strong\u003e Harvia Spirit and Virta offer modern aesthetics with full app connectivity\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-ideal-for\"\u003e\n\u003ch2\u003eIdeal For\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eHomeowners building a dedicated indoor sauna room in a basement, spare room, or addition\u003c\/li\u003e\n\u003cli\u003eDIY builders who want pre-cut, matched components without custom fabrication\u003c\/li\u003e\n\u003cli\u003eContractors outfitting residential or light commercial sauna spaces\u003c\/li\u003e\n\u003cli\u003eBuyers who want a complete interior kit with the option to add a heater in one order\u003c\/li\u003e\n\u003cli\u003eThose who prefer thermally modified, sustainably sourced wood for their sauna interior\u003c\/li\u003e\n\u003cli\u003eBuyers choosing between a simple built-in control heater and a WiFi-enabled model\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-important-info\"\u003e\n\u003ch2\u003eImportant Information\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eFraming, insulation, electrical, and exterior finish not included.\u003c\/strong\u003e This kit supplies all interior sauna components. The structural shell, insulation, wiring, and exterior wall covering must be provided on-site.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRecommended ceiling height is 8 feet.\u003c\/strong\u003e For custom ceiling heights, contact the Finnish Sauna Builders support team before ordering.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWall boards run horizontally by default.\u003c\/strong\u003e If room width exceeds 8 feet, an interior seam will be added where two boards meet to span the width.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDoor ships as all-glass.\u003c\/strong\u003e Some product photos may show a glass wall for reference; the included door is the all-glass model with wood handles and trim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackrests ship flat.\u003c\/strong\u003e If an angled backrest is preferred, additional spacers can be created on-site to achieve the desired pitch.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHeater installation requires a licensed electrician.\u003c\/strong\u003e If a heater option is selected, all electrical work must be performed by a qualified professional in accordance with local codes.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWiFi heater models\u003c\/strong\u003e require a home WiFi network for app-based control. Built-in control models (KIP80B, Cilindro PC80) operate via the on-unit panel only.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContact Finnish Sauna Builders\u003c\/strong\u003e before ordering if you have questions about bench configuration, ceiling height, or heater selection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/section\u003e\n\n\u003csection class=\"product-faq\"\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhat does the Carbon Smart™ 7x7x8 sauna kit include?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eThe kit includes all interior sauna components: foil vapor barrier, tongue-and-groove wall and ceiling boards, bench boards and supports, corner moldings, duckboard flooring, vent grills, an all-glass sauna door with wood handles and trim, ergonomic backrests, a headrest, a sauna bucket with liner and ladle, a thermometer, a vapor-proof sauna light, and installation instructions. Framing, insulation, electrical wiring, and exterior wall covering are not included.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhat do I need to supply that is not in the kit?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eYou are responsible for the structural framing, insulation, electrical wiring, and exterior wall covering. If you select a heater option, a licensed electrician must install the heater and dedicated electrical circuit in accordance with local codes.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhat is Thermo Poplar and why is it used?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eThermo Poplar is a sustainably sourced wood thermally modified at approximately 374°F using a chemical-free process. This treatment improves dimensional stability and resistance to humidity and temperature changes — properties that make it well-suited for the high-heat, high-humidity environment of a sauna interior. It also produces a warm, rich tone.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhat is the difference between the built-in control and WiFi heater options?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eThe Harvia KIP80B and Cilindro PC80 use a built-in control panel on the heater unit itself — no remote or app access. The KIP80W, Cilindro PC80E, Spirit, and Virta models connect to your home WiFi network and can be controlled via the Harvia app on your smartphone, including remote temperature setting and session scheduling.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhich heater option includes a safety railing?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eOnly the Harvia Virta 8kW WiFi option includes a protective safety railing. All other heater options in this lineup do not include a railing. If a railing is required for your installation, select the Virta option or purchase a compatible railing separately.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhat are the accessory package options?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eThere are four accessory options: No Accessories (kit only), Bench Skirting (adds a finished panel below the benches), LED Under-Bench Lighting (adds ambient lighting beneath the benches), and the Luxury Package which includes both bench skirting and LED under-bench lighting.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eIs this kit suitable for DIY installation?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eYes. The Carbon Smart™ kit is designed for both DIY enthusiasts and professional contractors. Detailed installation instructions are included. Electrical work for any heater must be performed by a licensed electrician regardless of who installs the sauna interior.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eWhat is the required rough opening for the sauna door?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eThe included all-glass sauna door requires a rough opening of 28” x 80”. The door frame measures 27.2” x 78.7” (690 x 2000 mm) and the glass panel measures 24.4” x 77.3” (620 x 1963 mm).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003cdetails class=\"faq-item\"\u003e\n\u003csummary class=\"faq-question\"\u003eCan I order a custom ceiling height?\u003c\/summary\u003e\n\u003cdiv class=\"faq-answer\"\u003e\n\u003cp\u003eThe standard recommended ceiling height is 8 feet per manufacturer safety and clearance guidelines. For custom ceiling heights, contact the Finnish Sauna Builders support team before placing your order.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/details\u003e\n\n\u003c\/section\u003e\n\n\u003csection class=\"product-closing\"\u003e\n\u003cp\u003eThe Carbon Smart™ 7’ x 7’ x 8’ Indoor Sauna Kit is a well-organized, complete interior package for anyone building a home sauna with quality materials and a clean finish. Whether you want a simple built-in control heater or a fully WiFi-connected model, the options at checkout let you configure the right kit without sourcing components from multiple suppliers. Contact Finnish Sauna Builders before ordering if you have questions about configuration, heater selection, or installation requirements.\u003c\/p\u003e\n\u003c\/section\u003e\n\n\u003cp style=\"text-align:center;\"\u003e\u003csmall\u003eThis product is a sauna room kit intended for use as a personal wellness space. It is not a medical device and is not intended to diagnose, treat, cure, or prevent any health condition. Consult a qualified healthcare provider before use if you have any medical concerns.\u003c\/small\u003e\u003c\/p\u003e\n\n\u003cscript type=\"application\/ld+json\"\u003e\n{\n  \"@context\": \"https:\/\/schema.org\",\n  \"@type\": \"FAQPage\",\n  \"mainEntity\": [\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What does the Carbon Smart 7x7x8 sauna kit include?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The kit includes all interior sauna components: foil vapor barrier, tongue-and-groove wall and ceiling boards, bench boards and supports, corner moldings, duckboard flooring, vent grills, an all-glass sauna door with wood handles and trim, ergonomic backrests, a headrest, a sauna bucket with liner and ladle, a thermometer, a vapor-proof sauna light, and installation instructions. Framing, insulation, electrical wiring, and exterior wall covering are not included.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What do I need to supply that is not in the kit?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"You are responsible for the structural framing, insulation, electrical wiring, and exterior wall covering. If you select a heater option, a licensed electrician must install the heater and dedicated electrical circuit in accordance with local codes.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is Thermo Poplar and why is it used?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Thermo Poplar is a sustainably sourced wood thermally modified at approximately 374\\u00b0F using a chemical-free process. This treatment improves dimensional stability and resistance to humidity and temperature changes, making it well-suited for sauna interiors. It also produces a warm, rich tone.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the difference between the built-in control and WiFi heater options?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The Harvia KIP80B and Cilindro PC80 use a built-in control panel on the heater unit itself with no remote or app access. The KIP80W, Cilindro PC80E, Spirit, and Virta models connect to your home WiFi network and can be controlled via the Harvia app, including remote temperature setting and session scheduling.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Which heater option includes a safety railing?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Only the Harvia Virta 8kW WiFi option includes a protective safety railing. All other heater options in this lineup do not include a railing.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What are the accessory package options?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"There are four accessory options: No Accessories, Bench Skirting, LED Under-Bench Lighting, and the Luxury Package which includes both bench skirting and LED under-bench lighting.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Is this kit suitable for DIY installation?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"Yes. The Carbon Smart kit is designed for both DIY enthusiasts and professional contractors. Detailed installation instructions are included. Electrical work for any heater must be performed by a licensed electrician.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"What is the required rough opening for the sauna door?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The included all-glass sauna door requires a rough opening of 28 inches by 80 inches. The door frame measures 27.2 by 78.7 inches and the glass panel measures 24.4 by 77.3 inches.\"\n      }\n    },\n    {\n      \"@type\": \"Question\",\n      \"name\": \"Can I order a custom ceiling height?\",\n      \"acceptedAnswer\": {\n        \"@type\": \"Answer\",\n        \"text\": \"The standard recommended ceiling height is 8 feet. 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