
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 Madison is the sensible indoor pick: it uses your existing flooring, seats up to three across two bench levels, hits a stated 180°F in about an hour, and can be ordered as a hybrid with infrared panels. It still needs a hardwired 240V/30A circuit, and the hybrid panels are a paid upgrade rather than standard equipment.
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The Madison converts an indoor corner into a traditional sauna: a 65" x 53" x 77⅝" cabin (60¼" x 48½" x 76⅛" inside) designed to sit on your existing flooring, with an upper and lower bench giving a choice between intense and gentler heat. Almost Heaven states the Harvia 6kW heater reaches 180°F in an hour, with a delayed start programmable up to eight hours — one of the few concrete performance claims in the company's lineup. The $5,160 base configuration (against a $6,450 compare-at) is Rustic Red Cedar with a glass door and the dial-controlled KIP heater; Hemfir lumber, a half-and-half door, smart heaters with Fenix Wi-Fi control, and — uniquely in this group — an infrared-panel hybrid version are all configurator options.
The electrical requirement does not shrink indoors: the heater needs a hardwired 240V/30A circuit, with lighting on a separate 110V/15A plug-in feed, and the kit ships within 6–8 weeks. The room carries the brand's limited lifetime warranty against manufacturing defects, with Harvia heater elements covered for 1 year and other heater components for 5. Assembled weight is not published, and the hybrid infrared upgrade's panel specifications (wattage, wavelength) are not detailed on the product page, so buyers weighing the hybrid option are choosing it on concept rather than published numbers.
Installation
Indoor kit assembly using existing flooring; heater hardwired to 240V/30A circuit; ships within 6–8 weeks
Electrical
Heater: 240V / 30A hardwired; lighting: 110V / 15A plug-in
Warranty
Limited lifetime warranty on the sauna (manufacturing defects); Harvia heater: 1 year heating elements, 5 years other components
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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Best for Indoor full-spectrum infrared with the best warranty

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