
Clearlight
Clearlight Sanctuary 2
Best for Indoor full-spectrum infrared with the best warranty
- Type
- Full-spectrum infrared
- Max temperature
- 125–145 °F
- Capacity
- 2 persons

The Alcove is Redwood Outdoors' entry into indoor traditional saunas: a 49 x 48-inch footprint, a stated 194°F ceiling, and a real Harvia 6kW heater included at $4,299. Redwood calls it their easiest sauna to assemble thanks to prebuilt panels, and being indoors it skips weatherproofing concerns entirely. The catch is that the heater still needs a hardwired 240V/30A circuit installed by an electrician, and the structural warranty runs only one year.
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The Alcove's pitch is a genuine Finnish-style sauna in a footprint of roughly four by four feet. It is built from heat-treated, FSC-certified hemlock, weighs 800 lbs, and reaches a stated 194°F with steam when water is poured over the included rocks. The full tempered-glass front wall keeps the small 2-person interior from feeling closed in, and a raised bench with a step stool puts the bather in the hottest zone near the ceiling. The included package is unusually complete at this price: the 6kW Harvia KIP heater, sauna rocks, a light fixture, towel peg, stool, doormat, and a felt sauna hat, with upgrades running from an 8kW KIP Wi-Fi up to a 9kW Homecraft H-Series.
Installation is the main planning item. Assembly itself is panelized and, per Redwood, takes a few hours, but the heater cannot plug into a standard outlet — it must be hardwired to a 240V circuit (30A for the base 6kW, 40A for the 8kW) by a certified electrician, with a separate 120V feed for lighting. Redwood publishes a clear maintenance routine (sauna wax or paraffin oil on benches, stone inspection every six months) and offers Wi-Fi scheduling via the Fenix controller with compatible heaters. What is not published: a warm-up time figure, and structural warranty coverage is a short one year, though the Harvia heater itself carries five years on non-element components.
Installation
Indoor DIY assembly from prebuilt panels, described by Redwood as a few hours; heater must be hardwired by a certified electrician; ships freight in a wooden crate
Electrical
240V hardwired heater circuit (30A for 6kW, 40A for 8kW); 120V for lighting; certified electrician required
Running cost
Base 6kW heater draws up to about 6 kWh per hour of heating at full output; small interior volume keeps sessions efficient
Warranty
1-year limited warranty on the wooden sauna structure; Harvia heater covered 1 year on elements and 5 years on other components (residential)
Maintenance
Optional sauna wax or paraffin oil on benches and floor; wipe heater exterior periodically; restack and inspect heater stones every 6 months
See this product side by side with its closest rivals.
The manufacturer documentation, independent reviews and retailer listings this review draws on, with the date each was last checked.

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