120V vs 240V sauna: what's the difference?

Updated 30 Oct 2026Figures from 140 saunas we list

Of the 140 saunas we list, 31 plug into a standard 120V outlet, 23 need a dedicated 120V circuit and 86 need a dedicated 240V or 30A circuit. The heater decides which.

31Plugs into a standard 120V 15A outlet
23Needs a dedicated 120V circuit
86Needs a dedicated 30A or 240V circuit

Why heaters need different supplies

A standard 120V, 15A household circuit can deliver about 1,800 W, and less is recommended for a continuous load. That's enough for many infrared cabinets. Traditional stoves usually run 4.5 to 9 kW, which needs 240V. Here's how it splits by heating type:

HeatingStandard outletDedicated 120V240V or 30A
Infrared31223
Traditional0079
Hybrid014

What 240V means for your budget

A 240V sauna needs a dedicated circuit, often hardwired, run by a licensed electrician, and sometimes a permit or panel upgrade. Our installation cost guide has sourced ranges. A plug-in sauna avoids that cost, but check that the outlet isn't shared with other heavy loads.

What works

  • 120V: no new wiring for many infrared cabinets
  • 240V: powers the stove heaters traditional saunas need
  • Both: the seller's listing states which you need

What to watch

  • 120V: lower power limits size and top temperature
  • 240V: electrician, permit and possibly a panel upgrade
  • Any: a licensed electrician must confirm your panel

Plug-in saunas

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Finnmark · Infrared · indoor cabinet

FD-1 Full Spectrum 1-Person

Seats
1, per the maker
Exterior W × D × H
37 × 38 × 78 in
Heating
Full-spectrum infrared panels
Power
120V, 15A · 1,450 W

Main advantage: Long warranty: 10 years on the cabin indoors (5 if used outdoors), lifetime on the heaters

Main compromise: No clear weak spot against similar saunas in the published specs

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Finnmark · Infrared · outdoor barrel

FD-6 Infrared Barrel, Cedar

Seats
4, per the maker
Exterior W × D × H
75 × 79 × 75 in
Heating
Full-spectrum infrared panels
Power
120V, 15A · 1,750 W

Main advantage: Strong heat for its type: up to 170°F

Main compromise: Priced high for its category: $9,995 against a $4,290 median for infrared outdoor saunas

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Dynamic (Golden Designs) · Infrared · indoor cabinet

San Marino 2-Person

Seats
2, per the maker
Exterior W × D × H
47 × 42 × 75 in
Heating
Far infrared panels
Power
120V, 15A · watts not published

Main advantage: Low price for what you get: $1,999 against a $3,098 median for infrared indoor saunas

Main compromise: Wattage not published, so running cost can't be estimated

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Dynamic (Golden Designs) · Infrared · indoor cabinet

San Marino Elite 2-Person (Ultra Low EMF)

Seats
2, per the maker
Exterior W × D × H
47 × 42 × 75 in
Heating
Far infrared panels
Power
120V, 15A · watts not published

Main advantage: Low price for what you get: $2,099 against a $3,098 median for infrared indoor saunas

Main compromise: Wattage not published, so running cost can't be estimated

Check your wiring against every sauna

Fit Check compares your supply with what each sauna needs.

Electrical guidance here is preliminary and doesn't replace a licensed electrician. See Sauna electrical requirements for every sauna's exact connection.

Before you buy

Check what your panel needs, installation cost and running cost. Still deciding on a type? Read infrared vs traditional and indoor vs outdoor, or see how the brands compare. A licensed electrician should confirm any wiring before you order.

Questions buyers ask

Can I plug a sauna into a regular outlet?

31 of the 140 saunas we list are sold as plug-in for a standard 120V outlet, mostly infrared. An electrician should still check the circuit isn't shared with other heavy loads.

Do traditional saunas need 240V?

79 of the 79 traditional saunas we list need a 240V or 30A circuit.

Related guides

Sauna electrical requirementsVolts, amps and connection type for every sauna we list.Best plug-in saunasWhich saunas run on a regular 120V outlet, and which need a circuit.Sauna installation costSourced estimates for wiring, foundation, ventilation and assembly.Infrared vs traditionalHeat, wiring, price and running cost, from 140 real models.

Independent by design. We order saunas with our published method. Cedar Scout may earn a commission when you buy through affiliate links on this page. Commissions never change which saunas appear, their scores or their order. How we earn money.