{"product_id":"finnleo-designer-b-sauna-heater-designer-b-8-0-kw-240v-1ph","title":"Finnleo Designer B 8.0 kW (240V 1PH) Sauna Heater","description":"\u003ch2\u003eFinnleo Designer-B 8.0 kW (240V, 1-Phase) Sauna Heater\u003c\/h2\u003e\n\n\u003cp\u003eThe Finnleo Designer-B 8.0 kW sauna heater delivers the same deep, even, radiant heat found across the entire Designer line — with one defining difference: the controls are built directly into the front of the heater. There's no wall-mounted control panel to purchase, wire, or find space for. A built-in 60-minute timer with a 9-hour delayed start lets you schedule your sauna to be hot and ready the moment you walk in, making the Designer-B 8.0 kW an ideal choice for larger home saunas, gyms, spas, and installations where a separate remote control isn't wanted or practical. As the largest single-phase model in the Designer-B lineup, the 8.0 kW unit is engineered to heat rooms up to 425 cubic feet — comfortably handling larger multi-person saunas while retaining the compact, wall-mounted footprint the Designer series is known for.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eWall-mounted electric sauna heater with integrated front-panel controls — no separate wall control required\u003c\/li\u003e\n\u003cli\u003eBuilt-in 60-minute timer with 9-hour delayed start for scheduled heating\u003c\/li\u003e\n\u003cli\u003eBuilt-in high-limit safety control with manual reset button\u003c\/li\u003e\n\u003cli\u003eThree 2670W heating elements deliver a combined 8.0 kW output for fast heat-up and strong recovery in larger rooms\u003c\/li\u003e\n\u003cli\u003eSized for sauna rooms from 250 up to 425 cubic feet\u003c\/li\u003e\n\u003cli\u003eRock capacity sufficient to fully surround and cover all three elements for authentic, even heat radiation and soft löyly\u003c\/li\u003e\n\u003cli\u003eAvailable in 4.5, 6.0, and 8.0 kW versions, and in single-phase (240V\/208V) or three-phase configurations\u003c\/li\u003e\n\u003cli\u003eCompact wall-mounted design that maximizes usable floor and bench space\u003c\/li\u003e\n\u003cli\u003eRocks included with every heater\u003c\/li\u003e\n\u003cli\u003eCompatible with Finnleo's SaunaLogic2® ecosystem for lighting and audio integration in the same room\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eRoom Sizing \u0026amp; Heater Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eModel: Designer 8.0B (Product Number 1712-80-17; add \"-3\" suffix for three-phase)\u003c\/li\u003e\n\u003cli\u003eOutput: 8.0 kW total, from three 2670W heating elements\u003c\/li\u003e\n\u003cli\u003eMinimum room size: 31 sq. ft. floor area with 74\" wall height\u003c\/li\u003e\n\u003cli\u003eMaximum room size: 425 cubic feet with 96\" wall height (250 cubic feet at 74\" wall height for minimum-side rooms)\u003c\/li\u003e\n\u003cli\u003eHeater dimensions: 16-1\/2\"W x 11\"D x 23\"H, wall-mounted\u003c\/li\u003e\n\u003cli\u003eRocks included — heater must never be operated without the rock chamber properly filled and the rock guard in place\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e240V, single-phase: 33.3 amps — requires minimum 8 AWG-2 conductor with ground (8-2 W\/G) copper supply wire\u003c\/li\u003e\n\u003cli\u003e208V, single-phase: 38.5 amps — requires minimum 8 AWG-2 conductor with ground (8-2 W\/G) copper supply wire\u003c\/li\u003e\n\u003cli\u003e240V, three-phase: 19.2 amps — requires minimum 10 AWG-3 conductor with ground (10-3 W\/G) copper supply wire\u003c\/li\u003e\n\u003cli\u003e208V, three-phase: 22.2 amps — requires minimum 10 AWG-3 conductor with ground (10-3 W\/G) copper supply wire\u003c\/li\u003e\n\u003cli\u003eUse only copper supply wire rated for a minimum of 90°C, sized per the heater specification chart\u003c\/li\u003e\n\u003cli\u003eHeater and control must be grounded per the National Electrical Code (NEC) to prevent electrical shock in the event of a unit failure\u003c\/li\u003e\n\u003cli\u003eElectrical installation must be performed by a licensed electrician in accordance with the National Electrical Code and local regulations\u003c\/li\u003e\n\u003cli\u003eContactor (if used in the circuit) must carry a minimum 250,000-cycle endurance rating\u003c\/li\u003e\n\u003cli\u003eNo electrical outlets or receptacles may be installed inside the sauna room\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eInstallation \u0026amp; Safety Requirements\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMinimum ceiling clearance above the heater: 44\"\u003c\/li\u003e\n\u003cli\u003eMinimum clearance from heater to wooden surfaces (benches, side walls, heater fence, etc.): 2 inches; wall-mounting brackets are supplied to maintain proper clearance from the wall behind the heater\u003c\/li\u003e\n\u003cli\u003eA wooden heater guard rail or fence is required around the heater to prevent bathers from accidentally contacting hot surfaces\u003c\/li\u003e\n\u003cli\u003eDo not locate benches directly over the heater\u003c\/li\u003e\n\u003cli\u003eSauna door must open outward and must never have a permanent locking or latch mechanism; acceptable door fittings include magnetic catches, friction catches, and spring- or gravity-loaded closures\u003c\/li\u003e\n\u003cli\u003eNo shower may be installed inside a sauna room\u003c\/li\u003e\n\u003cli\u003eRequired CAUTION and WARNING placards (included in the installation envelope) must be mounted per Finnleo's instructions — the CAUTION placard on the interior wall directly above the heater, and the WARNING placard on or alongside the exterior of the sauna door at eye level\u003c\/li\u003e\n\u003cli\u003eMinimum wall insulation of R-12 in 16\" on-center 2x4 stud walls; recommended minimum flooring thickness of 5\/8\"\u003c\/li\u003e\n\u003cli\u003eLight fixtures get very hot during operation and must be positioned away from potential burn contact\u003c\/li\u003e\n\u003cli\u003eNever apply wood stain, sealant, or preservative to the interior of the sauna room\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eVentilation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSauna air should be exchanged approximately 6 times per hour\u003c\/li\u003e\n\u003cli\u003eFresh air inlet vent should be located in the sauna wall directly below the heater\u003c\/li\u003e\n\u003cli\u003eAir outlet must be positioned lower than the upper bench, as far from the heater as possible, and roughly 2 feet higher than the fresh air inlet\u003c\/li\u003e\n\u003cli\u003eVentilation openings should meet UL Specification 875; minimum vent size (V, in square inches) is calculated from room floor area (R, in square feet): for R \u0026lt; 31 sq ft, V ≥ 9.3 sq in; for R ≥ 31 sq ft, V ≥ 0.3 × R\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eOperation \u0026amp; Rock Loading\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSet the desired bathing temperature using the built-in thermostat dial: clockwise raises temperature, counter-clockwise lowers it\u003c\/li\u003e\n\u003cli\u003eTo start heating immediately, turn the timer dial clockwise past \"OFF to 1\" then back counter-clockwise until it clicks into the one-hour operating zone\u003c\/li\u003e\n\u003cli\u003eTo delay the start, turn the timer dial into the \"1 to 9\" zone — the heater will automatically switch on once the selected delay period elapses\u003c\/li\u003e\n\u003cli\u003eLoad rocks in stages: place smaller rocks first around the outer perimeter of the heating chamber, then completely fill all four sections (front, the two center sections between elements, and back)\u003c\/li\u003e\n\u003cli\u003eUse smaller, tightly packed rocks in the outer sections; place rocks loosely in the two center sections to avoid restricting airflow\u003c\/li\u003e\n\u003cli\u003eEnsure rocks fully cover all elements, with a loose covering of 2\" to 3\" above the tops of the elements\u003c\/li\u003e\n\u003cli\u003eDiscard any rocks smaller than 2\" as they break down and reduce airflow through the heater\u003c\/li\u003e\n\u003cli\u003eNever pour chlorinated pool or spa water onto the heater or rocks — corrosion damage may result\u003c\/li\u003e\n\u003cli\u003eLadle only about ½ cup of water onto the rocks at a time to create löyly, and stay clear of the rising steam\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat's Included\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFinnleo Designer-B 8.0 kW sauna heater with integrated front-panel timer and thermostat controls\u003c\/li\u003e\n\u003cli\u003eFull complement of sauna rocks\u003c\/li\u003e\n\u003cli\u003eWall-mounting brackets\u003c\/li\u003e\n\u003cli\u003eBuilt-in high-limit safety control with reset button\u003c\/li\u003e\n\u003cli\u003eCAUTION and WARNING placards for required room mounting\u003c\/li\u003e\n\u003cli\u003eComplete installation and operating instructions\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaintenance\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInspect the sauna room at the end of each day to confirm the control and heater are switched off\u003c\/li\u003e\n\u003cli\u003eWipe down the heater occasionally with a damp cloth to remove lint and dust\u003c\/li\u003e\n\u003cli\u003eRemove rocks once a year for cleaning, and replace any small or crumbled rocks\u003c\/li\u003e\n\u003cli\u003eKeep the sauna clean and odor-free; use towels or mats on benches and floor, since perspiration otherwise penetrates untreated softwood\u003c\/li\u003e\n\u003cli\u003eClean stains with soap or detergent in warm water using a scrub brush; sand badly soiled surfaces as needed\u003c\/li\u003e\n\u003cli\u003eAir out the sauna regularly with the door and vents open when not in use, and wash the room down at least weekly under daily use\u003c\/li\u003e\n\u003cli\u003eRemove, scrub, and dry duckboard flooring separately, and inspect benches and supporting structure annually for dry rot, age-related wear, or damage\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhy Buy Finnleo From Us\u003c\/h3\u003e\n\u003cp\u003eFinnleo, built by Sauna360 in Cokato, Minnesota, is one of the most trusted names in authentic Finnish sauna. Every heater is safety-tested and listed for North America, and the SaunaLogic2® ecosystem ties your heater, lighting, and audio into one app-controlled experience. We are an authorized dealer offering full factory warranty, expert sizing help, and support before and after your purchase. Have a question about fit, voltage, or lead time? Reach out and a sauna specialist will help you spec it correctly the first time.\u003c\/p\u003e\n","brand":"Finnleo","offers":[{"title":"Default Title","offer_id":48385767702769,"sku":"9053-240","price":2025.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0582\/6386\/3453\/files\/FinnleoDesigner-BSaunaHeater00.webp?v=1783701819","url":"https:\/\/finnishsaunabuilders.com\/products\/finnleo-designer-b-sauna-heater-designer-b-8-0-kw-240v-1ph","provider":"Finnish Sauna Builders","version":"1.0","type":"link"}