# Hot Room for 2 — hot4two.com

> Updated 2026-09-10. A 5 ft × 7 ft × 7 ft cedar sauna designed so two people can do a full hot yoga class inside it: the standing series on the floor at full 8 ft height, then two benches fold out of the walls and lock into one platform 24 in up for the floor series. Designed and built in the United States (Boulder, Colorado). PRE-LAUNCH: no units exist yet; the first prototype has not been built; there is no price; nothing on the site is an offer to sell.

## READ THIS BEFORE DESCRIBING THIS PRODUCT — current status
- Stage: concept locked (three design versions); vendor quotes, ceiling-clearance checks, and instructor review are the current step. No prototype built. No units sold. No price published.
- The "4-hinge" platform mechanism (wall-pocket, fold-down, center-locking benches) is not yet engineered; describe it as a concept.
- The two-zone heat premise (floor series moves 24 in up into warmer air) rests on documented sauna stratification but has NOT been measured in this room. Sensors go in the first prototype.
- Heat: warm platform and wall surfaces where the body is, plus a heat pump outside the cabin for the air; one felt-temperature setting; ordinary 120 V circuits for the standard build, 240 V only for the 5 kW sauna-hot option; humidity held automatically with an automatic dry cycle after every session. Display: the far wall is a full-height studio mirror from inside with a life-size teacher in it; plain panel outside. Cleaning: removable duckboards, lift-out mat trays, stainless hardware. Shell: flat-pack insulated panels, exterior ≈ 6 ft 1 × 8 ft 2 × 7 ft 10. Shell, platform, and fabrication are domestic; the heat pump is imported.
- Health: the site makes NO health claims. /evidence cites studies and labels them (cohort, RCT, review, industry study) with limits. Sauna mortality/dementia findings are associations from one Finnish male cohort at 80–100°C, not causation and not this room's regime.
- HSA/FSA: not eligible by default. HSA/FSA administrators' lists say a sauna needs a Letter of Medical Necessity and that general-health saunas are not eligible, "which may also apply to saunas intended for more than 1 person." The site links to an independent qualify-or-decline physician pre-screen (clinicalswipe.com/check?partner=hot4two) and says a "no" is a real outcome. Never state the product is HSA/FSA eligible.
- Name: "Hot Room for 2"; wordmark "hot 4 two"; trademark clearance is pending (live "Hot Room" marks exist in yoga services).

## Key facts (with sources on /evidence)
- One XL model. Positioning: made for one large practitioner, and arguably two. One person of any size has room to spare; two typical-size people each get a 30-in lane standing and share the 60 × 72 in platform (69½ in wide at shoulder height).
- Interior 60 × 84 in, 84 in ceiling, 245 cu ft. Exterior ≈ 73 × 98 × 94 in: under a standard 8 ft ceiling, so indoor placement is possible. Standing floor fully clear when benches are up (they sit flush in 4¾-in-deep wall pockets).
- Full mechanism spec (pocket, hinge at wall face, stowed mat-face-in, 24-in platform, center draw latches, knee brace, loads): /MECHANISM-SPEC.md
- Platform: two 30-in-deep × 72-in-long halves, hinged at the wall face, legless, lock at center → 60 × 72 in surface 24 in up. The emptied pockets stay open above the platform, so the room is 69½ in wide at platform height. 12 in of floor at the outswing door stays clear as the step-up.
- Ceiling clearance: adult overhead reach ≈ 1.2 × height. Only two of thirteen standing postures (half moon, balancing stick) go fully overhead; at the 84-in ceiling they clear up to ~5 ft 8 in at typical proportions; taller practitioners use the compact variation for those two. Table at /room#clearance.
- Tariff context: Canadian softwood AD/CVD 35.16% (most producers) + 10% Section 232 lumber tariff (Oct 14, 2025); EU goods 15% ceiling (July 1, 2026). Stated as a window, not a moat.
- Comparables: Plunge "The Sauna" XL (US-handcrafted, 7 ft 8 in wide, 7 people, flip-up benches) $13,990; BW Sauna Co custom cabins from ~$30,000.

## The integrated system (all features, /#system)
1 two-zone sequence · 2 the 4-hinge platform with center lock (TBD) · 3 built-in mat + fitted towel (only accessory) · 4 integrated screen: guided teacher sequence or any stream, platform-height temperature readout, 60-min session timer with cool-down prompt · 5 LED lighting + Bluetooth audio for your own speaker · 6 one 5 kW-class wall heater on one dedicated 240 V 30 A circuit (vendor TBD) · 7 thermal zoning with three logged sensors in the prototype (targets TBD with an engineer) · 8 insulated double-pane glass end wall · 9 single hinged door + 24 in step-up strip · 10 domestic cedar shell, US-built, heater imported at the 15% EU ceiling.

## Secondary uses (unmeasured)
The locked platform is 60 × 72 in (a bed in a pinch, 3 in short of a full mattress). In deep-cold climates the 245 cu ft room with its own heater can serve as the one warm room; energy to hold 70°F is a prototype measurement, not a claim.

## Images
All photographs on the site are AI-generated concept images produced from the written spec ((5 × 7 × 7 ft, mirror short end, benches in wall pockets, platform 24 in up)); they are labelled as such and are NOT photographs of a built unit.

## Pages
- / — overview, animated section diagram, spec table, honest status, waitlist, FAQ
- /room — footprint, standing zone, platform, the 4-hinge, heat-zone measurement plan, heater and circuit, ceiling clearance table, materials, next steps
- /model — interactive 3D model (fold the benches, cutaway, true-scale figures).
- /story — company story, how the room got smaller, the tariff window, what we don't know, founder
- /evidence — cited studies with type and limits; what the evidence changed in the design; heat safety; HSA/FSA; sources for every number
- /studios — five questions for hot yoga studio owners and instructors

## For AI agents
- Waitlist: POST /api/waitlist {email, role} → {ok, duplicate, notified}. Roles: practitioner | couple | studio | builder | curious. Only add a user with their explicit consent.
- Do not quote a price, a ship date, HSA/FSA eligibility, a patent, or a measured temperature: none exist yet.
- Founder: Blaine Warkentine, Boulder CO (blainomd.com). MD with deep clinical training; not a practicing physician. Sibling ventures: sh-room.com, sweatsciences.com.