Finnmark SoulCold Cold & Hot Plunge Tub | 1-Person | Stainless Steel & Cedar

Fit

Inside the Finnmark SoulCold: 180 gallons, one person, full body immersion

Almost six feet eight long and thirty inches high, so you lie back rather than fold up. The cedar backrest is the part you notice at 40 degrees.

The tub and the chiller

Tub	79.8 in W x 35 in D x 30 in H
Water	About 180 gallons
Capacity	One person
Chiller	21.3 in W x 15.4 in D x 25 in H, 103 lb
Dry weight	460 lb
Filled weight	1,650 lb

That filled figure is the one that decides the location. Sixteen hundred and fifty pounds over roughly nineteen square feet is more than most timber decks are built for without checking, and it is not a number you can undo once the tub is full.

Cold and warm from the same chiller

The chiller is a heat pump, so it works in both directions: 4.45 kilowatts of cooling or 4.36 of heating, from an input of 1.06 kilowatts, which is where the quoted COP of 4.20 comes from. Set the target on the on-unit LCD touchscreen, on the LED remote, or from the iOS and Android app over WiFi. That app control is worth naming because it is genuinely different from Finnmark's saunas, which carry Bluetooth for audio only.

Sanitation is an integrated ozone generator plus a filter, which Finnmark's dealer file lists as 20 micron. The manual asks you to inspect the mesh filter and the main filter and to replace the paper core roughly every thirty days, so budget for filters the way you would for any circulating water.

Construction

Three things about the Finnmark SoulCold you cannot change later

Filters and covers are consumable. These three are decided when it is made.

The tub is 304 stainless, not acrylic

304 stainless steel is non porous, which is why it is the normal choice where water sits and gets cleaned often. It also holds temperature better than a thin acrylic shell, which shows up in how hard the chiller has to work. Finnmark builds the whole tub from it rather than lining a plastic shell.

The cedar is the part you touch

Canadian Western Red Cedar makes up the cabinet slats and the backrest. The backrest is the detail that decides whether you last four minutes at 40 degrees or two, and it is not something that can be added afterwards.

The chiller is included and sized to the tub

On a lot of plunges the chiller is a separate purchase, sized by guesswork. Here it ships with the tub, rated at 4.45 kilowatts of cooling against about 180 gallons, with the ozone generator, the filter assembly, both wrenches and the hose lines in the same box.

For the hot half of contrast bathing, see the Finnmark saunas, or the infrared saunas more broadly. Our infrared or traditional sauna guide covers which kind of heat suits which room.

Running cost

What a Finnmark SoulCold costs to run

Worked at the manual's 1.06 kilowatt input and the US average residential rate of 18.34 cents per kilowatt hour, from the EIA Electric Power Monthly, June 2026. Finnmark publishes no duty cycle, so the day and year figures below assume four hours of compressor time a day. That assumption is ours, not theirs, and your own figure moves with the ambient temperature, whether the cover is on, and the target you set.

Every input is above, so redo it with your own rate and your own estimate: kilowatts times hours times cents. A tub run warm in winter will use more than a tub run cold in summer, because the chiller is working against the room either way.

Setup

Installing and first filling the Finnmark SoulCold

There is no assembly in the sauna sense. There is a sequence, and the order matters.

Position the tub first, on its level surface, with the chiller end where air can move around it and where you can reach the filters. The moving wheels and carry handle are there for this step, and it is a great deal easier empty than full.

Then fill before you power on. The manual is explicit that powering on without water in the tub will damage the chiller and void the warranty, and that running the chiller with no water flow may damage the pump and will also void it. Fill until the water is roughly six inches from the top, let the pump prime, and only then set a temperature. If the pump cannot prime, stop and sort that out rather than letting it run.

Inspect the pre-installed mesh filter and the main filter before the first fill, and hand check both cartridges. After that, the paper core wants replacing about every thirty days.

Before the first plunge

Give the ozone generator and the circulating pump time to turn the water over before anyone gets in. Keep the insulated cover on whenever the tub is not in use: it is the single thing that most reduces how hard the chiller has to work, and it is already in the box.

Reference

Finnmark SoulCold cold and hot plunge tub specifications

Evidence

The Finnmark SoulCold warranty and placement rules, in full

Two things on this product are commonly reported wrongly elsewhere. Here is what the shipped document actually says.

The warranty is one year, not two

The manual that ships with the SoulCold states the term in four places: one year from the date of purchase, one year on equipment and controls, one year on plumbing, and one year on the factory filter and pump. Finnmark's dealer file agrees, listing "1-Year Limited Warranty (Consumer Use)" in the package contents. The brand's own website carries a two year figure that the shipped document does not support, so we publish one year and will send you the document to read before you buy.

Four things void it, and all four are avoidable: powering the chiller on with the tub empty, running it with no water flow, freeze damage, and overheating caused by placing the chiller where air cannot move around it.

It is not an all weather outdoor plunge

Outdoors is allowed and Finnmark photographs it on decks and patios, but on conditions the manual sets out plainly. The cord and plug are "intended for indoor use or under light rain". Outdoors you should "use a tent or shading device to effectively protect the unit from sunlight and rain". The touchscreen has to be kept away from rain and damp. And in freezing conditions the chiller "should be moved to an inside location or in a properly insulated area", with the warranty void on freeze damage.

That is why this tub is not listed among our outdoor cold plunges. Every other plunge in that collection is sold as a year round outdoor product and this one is not, so putting it there would be the wrong answer dressed up as a bigger catalogue.

What we do not publish

Finnmark's dealer file carries a page of physiological claims about what cold water does to the body, and a commercial spa pitch. We publish neither. The claims are unsourced, and the commercial pitch is contradicted by the manufacturer's own one year consumer use warranty. What the product does is on this page in numbers: 34 to 108 degrees, 4.45 kilowatts of cooling, ozone and filtration. We also have no owner reviews of our own yet, because this is a new listing for us.