Outdoor Infrared & Traditional Barrel Sauna
Finnmark FD-7 4-Person Thermo-Aspen Combination Outdoor Barrel Sauna
The FD-7 is Finnmark’s pale barrel — a thermally modified European aspen shell wrapped around Canadian cedar seating. It seats four in 135 cubic feet, over an interior of 66 by 72 by 71 inches, and it heats two ways: five infrared panels built into the cabin, plus a traditional rock heater specified separately. The ceiling is 185°F once the rocks are in play, 170°F on infrared by itself.
Finnmark’s account of the aspen is a treatment of heat and steam with no chemicals in it, done for improved durability and moisture resistance. Their claim for the finished timber is that it will not rot, warp, decay or chip. The benches and backrest are a different wood entirely: clear grade Western Canadian Cedar, which Finnmark describe as naturally antimicrobial.
Capacity4 Bathers135 ft³ room volumeInterior66″ × 72″71″ tallShellEuropean Thermo-Aspen1.5″ stavesInfrared1,750W5 × 350W on a 120v cordThermally modified European aspenCanadian cedar benches and backrest185°F with the rock heaterUnder-bench RGB lighting
The Build
Two Woods, Each Doing A Different Job
The FD-7 splits its timber. Heat-treated European aspen forms the shell that stands out in the weather; Canadian cedar forms the benches and backrest you sit against. The door and the heaters complete the specification.
?European Thermo-Aspen ShellStaves 1.5 inches thick in thermally modified European aspen. Finnmark’s diagram describes the wood as naturally heat-treated for improved durability and moisture resistance, and their Thermal Plus™ process uses heat and steam with no chemicals. Their claim for the result is that it will not rot, warp, decay or chip.1.5″ Thermo-Aspen Staves?Canadian Cedar BenchesBenches and backrest are clear grade Western Canadian Cedar, the species Finnmark call naturally antimicrobial and resistant to mold, bacteria and fungus. The seating comes on two levels — 71″ × 24″ × 33.1″ above, 60.5″ × 16″ × 16.7″ below — in a layout Finnmark hold as patent pending.Two-Tier · Patent Pending?8mm Glass And Disc VentilationThe door glass is 8mm with a rubber gasket, in an opening of 26.3″ × 62.3″. Ventilation on the FD-7 is the disc type; the FD-6’s spec lists gravity.Door 26.3″ × 62.3″?Five Spectrum Plus PanelsFive infrared heaters at 350 watts each, 1,750 watts together, running on 120v 15a through a NEMA 5-15P plug and a nine-foot cord. Finnmark build the Spectrum Plus as UL Listed incoloy short-wave elements producing mid and far infrared, rated .99 emissivity, and they rate the cabin Very Low EMF.5 × 350W · Very Low EMF
Why Athletes Choose This
Eight Items Off The Spec Sheet
The therapy claims for infrared heat on this page are Finnmark’s, published with Finnmark’s own FDA disclaimer, and we leave them attributed there. Everything on the eight cards below is drawn from something checkable: the FD-7’s specification, what ships with it, and the terms of the warranty.
✅ETL certifiedThird-Party Listed?️Ten years on the saunaFinnmark’s Term♾️Unconditional lifetime heater coverSpectrum Plus™ Incoloy?Very Low EMF ratingFinnmark’s Rating?️185°F ceiling with the rocksTraditional Mode?RGB light under the benchShips With The Kit?Bluetooth audio and lighting controlWifi Controller 2.0?1,750W on a standard 120v circuit9-Foot Cord · NEMA 5-15P
Aspen Outside, Cedar Inside
A Closer Look At The FD-7
The Shell
Aspen That Has Been Through Heat And Steam
The staves photograph pale — the shell is thermally modified European aspen, 1.5 inches thick. Finnmark’s Thermal Plus™ process works the European aspen with heat and steam and nothing else — no chemicals go into it — and their labelled diagram for the FD-7 describes the wood as naturally heat-treated for improved durability and moisture resistance. Their claim for the finished stock is that it will not rot, warp, decay or chip. The staves are bound by three stainless steel bands, roofed with shingles and carried on three Shou Sugi Ban treated supports.
- Thermally Modified European Aspen staves, 1.5″ thick
- Heat and steam treatment, no chemicals — Finnmark’s
- Rain jacket: shingles
- Three stainless steel bands, three Shou Sugi Ban treated supports
- Exterior 75″ × 79″ × 75″, 830 lbs assembled
European Thermo-AspenThermal Plus™Seating
Cedar On The Surfaces You Sit Against
Inside the aspen barrel, the seating switches wood. Benches and backrest are clear grade Western Canadian Cedar, the species Finnmark call naturally antimicrobial and resistant to mold, bacteria and fungus. There are two levels of it: an upper bench of 71 by 24 by 33.1 inches over a lower bench of 60.5 by 16 by 16.7, in an interior of 66 by 72 by 71 inches. Finnmark hold the two-tier combination layout as patent pending, and an RGB LED light runs beneath the bench.
- Benches and backrest in clear grade Western Canadian Cedar
- Upper bench 71″ × 24″ × 33.1″
- Lower bench 60.5″ × 16″ × 16.7″
- Interior 66″ × 72″ × 71″, 135 ft³, rated for four bathers
- Under-bench LED RGB light included
Canadian CedarPatent PendingInfrared & Control
1,750 Watts Off A 15-Amp Household Circuit
Open the front and the infrared half of the cabin is laid out in front of you. Five Spectrum Plus panels at 350 watts each add up to 1,750 watts, and the whole infrared system plugs into 120v 15a on a NEMA 5-15P plug with a nine-foot cord. Finnmark build the panels as UL Listed incoloy short-wave elements putting out mid and far infrared at .99 emissivity, and their claim for them is deep penetrating heat up to 25 times more than standard carbon panel heaters — a number Finnmark state without publishing how it was measured. The Wifi Controller 2.0 handles the cabin, the audio over Bluetooth and the lighting from one LCD panel.
- Five Spectrum Plus infrared heaters, 350W each, 1,750W total
- 120v 15a, NEMA 5-15P, nine-foot power cord
- Infrared maximum temperature 170°F
- Very Low EMF rating, per Finnmark
- Wifi Controller 2.0 — LCD panel with Wi-Fi, Bluetooth audio and lighting control
UL Listed HeatersWi-Fi ControlTraditional Heat
The Rock Heater Is Yours To Specify
Water on hot stones is what takes this cabin to 185°F, and no rock heater ships with the FD-7. Finnmark leave the choice open on their own diagram, and three packages are offered on this page. The number to weigh them against is the cabin’s room volume of 135 cubic feet. The Harvia KIP 4.5kW packages are listed for 100 to 210 cubic feet. The HUUM DROP 6.0kW package is listed for 177 to 353. The decision belongs to you and your electrician.
- FD-7 room volume: 135 ft³
- Harvia KIP 4.5kW with knob controls and stones — rated 100–210 ft³
- Harvia KIP 4.5kW digital with Wi-Fi and stones — rated 100–210 ft³
- HUUM DROP 6.0kW with UKU Wi-Fi controller — rated 177–353 ft³
- Maximum 185°F when the rock sauna is used
Heater Sold Separately185°F
The Finnmark Barrel Pair
The Spec Sheets Agree Until You Reach The Timber
Line up the FD-6 and the FD-7 and the two specifications match each other all the way down: 135 cubic feet, the same two-tier cedar bench in the same sizes, the same 8mm glass and 26.3-inch door, the same three bands and shingle roof, the same five Spectrum Plus panels, the same 830 lbs assembled. The decision is a material one, shell timber and the ventilation type listed with it.
FD-6 — Clear CedarThe cedar build. One timber runs through the staves, the frame, the interior and the benches, and the tone in the photography is warmer for it.Clear Grade Western Canadian Cedar shellCedar frame, interior and benchesGravity ventilationShop the FD-6You’re HereFD-7 — European Thermo-AspenThe pale build. A heat-and-steam modified European aspen shell, with Canadian cedar kept for the seating.Thermally Modified European Aspen shellCanadian cedar benches and backrestDisc ventilationCurrently viewing
Questions
Frequently Asked Questions
It is European aspen that Finnmark have thermally modified with heat and steam, with no chemicals involved. Finnmark’s own diagram for the FD-7 describes it as naturally heat-treated for improved durability and moisture resistance, and their claim for the treated timber is that it will not rot, warp, decay or chip. On this barrel it appears as staves 1.5 inches thick, under a shingle rain jacket, held by three stainless steel bands and carried on three Shou Sugi Ban treated supports.The benches and backrest are clear grade Western Canadian Cedar, the same seating stock used in the FD-6 and the species Finnmark call naturally antimicrobial and resistant to mold, bacteria and fungus. The shell is the thermally modified European aspen.Four bathers, in an interior of 66″ × 72″ × 71″ holding 135 cubic feet. The bench is a two-tier system — 71″ × 24″ × 33.1″ on the upper level, 60.5″ × 16″ × 16.7″ on the lower — and Finnmark hold that combination infrared and traditional layout as patent pending.No. What ships is the FD-7 barrel kit — the thermo-aspen shell, the cedar two-tier bench, five Spectrum Plus infrared panels, the built-in Wifi Controller 2.0 and the under-bench LED RGB light. The traditional rock heater is specified separately, and three packages are offered on this page.The cabin’s room volume is 135 ft³. The Harvia KIP 4.5kW comes two ways on this page — knob controls with stones, or a digital version with Wi-Fi and stones — and both carry a rating of 100 to 210 ft³. The HUUM DROP 6.0kW, supplied with the UKU Wi-Fi controller, carries a rating of 177 to 353 ft³. Those ranges are listed with the packages; read them alongside whatever your electrician advises.The infrared side runs on 120v 15a through a NEMA 5-15P plug, on a nine-foot power cord — five Spectrum Plus heaters at 350W each, 1,750W in total. The traditional rock heater is not included; take its electrical requirement from the heater package you select.185°F when the rock sauna is used, which is the mode where you pour water over the stones. Infrared on its own reaches 170°F.Allow 75″ W × 79″ D × 75″ H for the exterior. The barrel weighs 830 lbs once assembled and travels at 1,005 lbs. Size the pad and check the route from the curb before you order.Free curbside delivery via freight to the 48 contiguous states, with free delivery damage insurance included. The freight carrier contacts you 24 to 48 hours ahead to set a day and time Monday through Friday inside a 4-hour window, and will not deliver without speaking to you first. The sauna arrives strapped to a pallet on a 53-foot semi-truck with a single driver, who unloads to your curbside or driveway only. Raise anything unusual about your access — long driveway, low branches, stairs, apartment complex — with us before the sauna ships. When the driver unloads, inspect the boxes and note any scratches, dents, or scuff marks on the delivery receipt. You do not need to open the boxes to do that.Finnmark cover the sauna with a 10-year warranty and the Spectrum Plus™ incoloy infrared heaters with an unconditional lifetime warranty. Finnmark’s framing for the ten-year term is worth repeating as they put it: in the USA the working lifetime of an infrared sauna is considered seven years, so a ten-year term still covers you past that point. They state operational life for the Spectrum Plus heaters at 40,000 hours. Full terms are in the Warranty tab. The FD-7 is ETL certified and made by Finnmark Designs of Wheeling, Illinois.
