Redwood Outdoors Duo Outdoor 2-Person

Redwood positions the Duo as its most compact outdoor model, aimed at urban lots and couples. The shell is Canadian Thermowood (Redwood's heat-treated hemlock, processed above 400°F to improve moisture resistance without chemicals), it weighs 910 lbs, sits on two cradles, and measures 62 3/4" L x 50 3/4" W x 82 3/4" H with trim installed. The purchase includes the 6kW Harvia KIP heater, sauna rocks, roof shingles, a bulkhead light, and a tempered glass door, with heater upgrades up to a 9kW Homecraft H-Series with Wi-Fi. Like every traditional sauna in Redwood's line, it supports both dry heat and steam from water poured over the rocks.

What the page does not state matters for planning: no maximum-temperature or warm-up figure is published for the Duo specifically, and the front step is sold separately. Electrical needs are the standard Redwood pattern — a hardwired 240V circuit (30A for the base 6kW heater, 40A for an 8kW upgrade) installed by a certified electrician, plus 120V for lighting — so budget for that trade work on top of the DIY kit assembly. Warranty coverage is one year on the wooden structure, with the Harvia heater carrying one year on elements and five years on other components; that is thin next to the multi-year structural coverage some competitors offer.