Saunas, Cold Plunges, Hyperbaric Chambers, and Red Light

A home sauna is an electrical project. A cold plunge is a floor-loading and drainage decision. A hyperbaric chamber is seven and a half feet of clear floor you probably haven't measured. A red light panel is a wall that has to hold twenty-five pounds.

The equipment is the easy part. What derails builds is the demand each one makes on the house before it makes a demand on your budget. Most of those demands are published by the manufacturer, in a document nobody reads until the delivery truck is already in the driveway.

This page is the short version of what each category needs. The guides go deeper, with the manufacturer's own numbers cited.

What each one actually asks of your house

Category	The constraint that stops projects
Sauna	A dedicated 240V circuit, sized to the heater, sized to the room. Get the order wrong and the electrical gets redone.
Cold plunge	Floor load, and a dedicated 120V circuit. The circuit surprises people more than the weight does.
Hyperbaric	Length. Lying chambers run roughly 7.5 feet long. Upright ones list a height, so check it against your ceiling.
Red light	Mounting. Full-size panels weigh 18–25 lb and need a wall, door or stand that holds them.

Saunas

The single most common mistake is assuming a small sauna means a small electrical job. It doesn't. Finlandia's smallest wall-mounted heater is 3.0 kW and it is published as 240V, 12.5 amps, on a 20A breaker. Scandia's Ultra Small comes in 3.0 kW and 4.5 kW, and both are 208V or 240V. There is no 120V option.

120V heaters do exist, but they are much smaller than people assume. Harvia's Vega Compact R BC19 is 1.9 kW. That is the scale at which 120V is on the table, not 4 or 5 kW.

The sequence matters more than any single number. The room determines the heater. The heater determines the circuit. Choose a heater before you've measured the room and you may be paying an electrician twice.

Start here: what size sauna heater you actually need, including why Harvia's own published range and Harvia's own published formula disagree about the same room. Then: what electrical work a home sauna actually requires.

Cold plunges

Almost every home cold plunge runs on ordinary 120V household power. That part is easy. The part people miss is the word dedicated.

Plunge publishes a dedicated 15A circuit for the Evolve Standard and a dedicated 20A circuit for the All-In and the Evolve Pro, and states plainly: "Do not use an extension cord for normal operation or temporary testing." Renu Therapy publishes 120V / 15A and recommends a dedicated circuit. Ice Barrel's chiller is rated at 115V with a 15A maximum overcurrent protection and ships with a GFCI module on the cord.

So the honest summary is not "it plugs into a normal outlet." It's "it plugs into a normal outlet that isn't sharing a circuit with anything else."

The other half is the floor. Water weighs roughly 8.34 pounds per gallon, and a plunge concentrates that weight over a very small footprint. The IRC's Table R301.5 sets a 40 psf live load for rooms other than sleeping rooms, 30 psf for sleeping rooms and 50 psf for passenger-vehicle garages. Local jurisdictions amend those numbers. Palmer, Alaska, for one, strikes the 30 psf sleeping-room figure and replaces it with 40.

Hyperbaric chambers

Home chambers run on standard household power. Newtowne's own manual says to plug the power cord into "a 120 volt., 60mz, 1phase, grounded receptacle," which it calls a standard home outlet. OxyNova publishes 800 W. None of them publish an amperage.

The constraint is length, and it's larger than most people picture. OxyHealth's Vitaeris 320 is published at 90 inches long, the same as the OxyNova 7. Newtowne's C4-27 is 92 inches. That is roughly seven and a half feet of clear floor, plus room to get in and out of it. Our guide to how much room a hyperbaric chamber takes works it out for a 90 by 33 inch chamber: about 11.5 by 7.75 feet, by our arithmetic.

Worth knowing before you shop: a lying chamber's listing usually gives only its diameter. That diameter is the chamber itself, not how high it sits on its frame, so don't plan a ceiling clearance from a diameter number. Sitting and upright chambers do list a height.

Red light panels

BonCharge's Max is published at 35.8 inches tall and 17.64 lb, drawing 1,000 W, with a recommended treatment distance of 3–12 inches. Mito Red Light's MitoPRO 1500X is 10 by 43 inches and 25 lb at 445 W, with a recommended distance of 12–18 inches.

Two things follow from those numbers. First, "full body" is a marketing term. At 36 to 43 inches tall, these panels cover roughly half a standing adult, so you either treat in sections or buy two. Our guide to full body red light panels compares panels and kits by height, from 20 inches to 72. Second, mounting is a real decision: 18 to 25 pounds on a door hook, a steel cable, or a stand is not a trivial load, and neither manufacturer publishes a wall-mount structural spec.

Guides for recovery rooms

Saunas

Cold plunges

Hyperbaric chambers

Red light panels

Before you shop

Every category on this page fails in the same place: someone chose the equipment first and discovered the house second. The free Room Planner is the thirteen measurements that decide which equipment is even available to you: ceiling height, floor load, panel capacity, clearances, drainage and the delivery path.

Get the free Home Performance Room Planner →

Specifications on this page verified September 2026 against published documentation from Harvia, Finlandia, Scandia, Plunge, Renu Therapy, Ice Barrel, Sun Home, Newtowne, OxyNova, OxyHealth, BonCharge and Mito Red Light, and against IRC Table R301.5 as reproduced by the New York State Department of State. Your model's manual governs. Codes are adopted and amended locally.