120V infrared vs 240V traditional sauna at home

Who this class fits

• A spare room, finished basement, or garage where you want daily heat.
• Households that only have 120V nearby, or that can budget a 240V run.
• People comparing an infrared cabin to a hot-air room — not a hot tub.

Skip this class if

• You only have a closet. Heat cabins need clearance, ventilation, and a door swing.
• You wanted a hot tub or swim spa. That is a different heat class and is not this page.

What the 120V infrared class is

Consumer infrared cabins are usually sold as a 120V plug-in or a hardwired 120V circuit. The selling point is that many houses already have that voltage in a spare room. You still have to check amperage: a unit that wants a dedicated 20A circuit is not the same as sharing a bedroom outlet with a space heater.

Air temperature is typically lower than a Finnish room. Heat comes from infrared emitters aimed at the body. That is a different exposure than a wood-stove or electric-stove sauna. For what papers measured on far-infrared and dry sauna, use the Therapies notes — this page does not restate those trials.

What the 240V traditional class is

Traditional home saunas in the US usually pair an insulated room (cedar or similar) with an electric heater in the several-kilowatt range. Those heaters are commonly specified for a dedicated 240V circuit. That is a panel and wiring job, not a power strip.

If your garage subpanel is already full, the constraint is the service, not the bench. An electrician can say whether a new 240V run is realistic. ThriveHop does not size breakers or invent a heater wattage for a brand.

Garage and indoor constraints

Indoor rooms need a vapor plan: flooring that tolerates sweat, a door that is not a bedroom closet, and exhaust so you are not dumping humidity into living space. Garages add vehicle exhaust, unconditioned temperature swings, and often a shared dryer circuit you should not tap.

GFCI protection, clearance to insulation and stored fuel, and a floor that can take the cabin weight are on you and the installer. Patio saunas exist as a class, but outdoor electrical still has to be rated for wet locations.

Published evidence lives on Therapies

Journal-cited notes are not repeated here. Open the matching Therapies page for what trials actually measured.

• Infrared sauna evidence notes
• Traditional sauna evidence notes

Class examples

Official public URLs. Not a recommendation order. No invented tracking tags.

Other home classes

• Ice barrel vs chilled plunge
• Garage contrast layout
• Panel vs mask vs bed