Costco Sauna Reviews – Indoor, Outdoor, & BARREL SAUNAS!

What Costco actually sells right now

Costco’s assortment moves, which is why an article like this goes stale fast. Checked in August 2026, the traditional saunas on costco.com are Almost Heaven models: the Arcadia and Duet two person barrels, the Morgan and Sierra four person barrels, the Vista, Valkea and Emerson six person barrels, the Oasis three person outdoor sauna, the Escape six person outdoor cabin and the Sanctum six person indoor room. All of them are red cedar with an electric Harvia heater and stainless hardware. Treat that list as a snapshot rather than a guarantee, because Costco adds and drops models without notice. Our newsroom looked at the wider pattern in Can Americans Get Past the Costco Sauna Phase?

Alongside those, Costco carries plug in infrared cabins under the Dynamic name, built by Golden Designs. They are a different category rather than a cheaper version of the same thing. A Dynamic cabin such as the Santiago Elite is Canadian hemlock, uses carbon far infrared panels rather than a rock heater, and runs on a standard 120 volt outlet. There are no rocks in one, so there is no steam. If you want a room you can sit in with no electrician involved, the 120 volt plug is exactly why that works. If you want steam off hot stones at 180 degrees, an infrared cabin is not that.

What the unit is under the brand name

Harvia of Finland acquired the Almost Heaven business in 2018, which is why the heater in a Costco barrel is not a generic import. The two, three and four person models ship with a 6.0 kW Harvia, and so does the Sanctum indoor room, which pairs it with a digital control and phone operation over Wi-Fi. The six person outdoor models step up to 8.0 kW. On the Vista and Valkea that heater is specifically the KIP, Harvia’s stainless wall heater with the controls built into the body, and the Oasis uses the black KIP at 6.0 kW. The Emerson runs an 8.0 kW Harvia with top side controls, and the Escape an 8.0 kW Harvia Deluxe.

That matters for a boring, practical reason. A Harvia KIP is a heater we stock, hold manuals for, and can get parts for, and its service parts are published: on the KIP80 the heating element is ZSL-316, the overheat limiter ZSK-764, the control knob ZSF-400. Five years from now, when an element goes, you are ordering a Harvia part rather than hunting a discontinued house brand. That parts list is one of the quieter reasons a Costco barrel is a more sensible purchase than it first looks.

The wood, and how red cedar behaves outdoors

Every Almost Heaven barrel at Costco is red cedar, and Almost Heaven’s own owner’s manual is honest about what that means. Left untreated the exterior changes color, and the manual says a red cedar sauna will become silvery gray and that it is fine to let it weather that way. At any point later you can pressure wash it, low pressure only, to bring back most of the original coloring. If you want to keep the color from the start, the manual asks for an outdoor stain with a UV inhibitor, and a clear one if you want the full natural tone. It then draws two hard lines: never treat the inside of the sauna, and never use varnish or paint on the exterior.

Cedar also moves. The manual notes that a sauna which absorbed moisture in storage will have its staves shrink as the first hot cycles drive that moisture off, so the stainless bands may need tightening further, and that a barrel left in open rain swells again and pulls its own seal tighter. That is the design working, not a fault, and knowing it turns a worrying week two into a ten minute job with two 18mm wrenches, which the manual lists in its tool list for exactly this reason.

The other thing cedar does is check. End grain cracking on stave ends and hairline splits at board corners come up often enough in our support mail that we have a standing answer: natural movement in a material that used to be a living tree, not a structural failure. We have also had an owner certain the center roof board had split, when that barrel design simply used two keystone boards meeting in the middle. Before filing a warranty claim on a crack, photograph it and call us on (844) 565-1113, because those two patterns account for most of the cracks we get sent.

Thermally modified wood is the other route into an outdoor barrel, and it is a difference in behavior rather than a ranking. The SaunaLife barrels we carry are built from thermo spruce with thermo aspen benches, wood that is heat treated rather than chemically treated so it takes on and gives off far less moisture. It barely expands and contracts, which is why it is the wood of choice on trailer mounted saunas. Cedar starts cheaper, smells like cedar, and silvers into something many people prefer. Thermally modified wood costs more and stays dimensionally quiet. Our barrel sauna range carries both.

Is the included heater sized for the room it ships with

This is the question we get asked least and should get asked most, so here is the arithmetic. Harvia publishes a room volume band for each KIP output on its US spec sheets: 4.5 kW covers 100 to 211 cubic feet, 6 kW covers 169 to 300, and 8 kW covers 250 to 425. Those bands assume an insulated, panelled room.

A barrel is not that. It is solid timber staves with no insulation layer, which is the exact case Harvia’s own manuals address with a log wall rule: multiply the whole room volume by 1.5 before you read the table. Skipping that step is the commonest sizing mistake we see. Harvia states that rule for log and solid timber walls generally rather than for barrels by name, and applying it to a barrel is our reading of it, but it is the conservative reading and it is the one we quote from.

Take the Morgan four person. Costco lists its interior at 71 by 64 inches, and Almost Heaven’s published interior width for its six foot barrels is 69 and a quarter, so the honest answer is a range. A cylinder that size, less the flat floor cut into the bottom of the circle, encloses roughly 127 to 135 cubic feet of air, which is about 190 to 200 once you apply the 1.5 multiplier. Harvia’s 6 kW band runs 169 to 300. Whichever end of that range is right, the included 6.0 kW heater sits inside its own manufacturer’s band.

Now the Vista six person, listed at 79.63 by 74.25 inches inside. That is roughly 195 cubic feet of air, about 295 after the multiplier. It sits right at the ceiling of the 6 kW band and squarely inside the 8 kW band of 250 to 425, which is exactly why Almost Heaven steps the six person barrels up to 8.0 kW. Somebody did the same arithmetic we just did.

So the heaters Costco ships are sized properly for the rooms they ship with, by the manufacturer’s own published numbers. The caveat is what those bands do not contain: outdoor ambient temperature. A room volume table says nothing about a barrel sitting in a Minnesota February. We have handled a 6 kW barrel that would not pass about 150 degrees in mid twenties Fahrenheit weather, and a second where a 6 kW never beat 165 degrees in a room that wanted the 8 kW. Both resolved with an output step rather than with troubleshooting. In a cold climate, kilowatts are the better reason to size up than seat count is.

One set of figures to have before your electrician arrives. An 8.0 kW KIP at 240 volts single phase draws 33.3 amps on #8/2 copper per Harvia’s manual, and the 6.0 kW draws 25.0 amps on #10/2. Almost Heaven adds that the heat involved requires copper wire with 90 degree C insulation, that aluminum wire must not be used, and that all wiring must conform to national, state and local codes. It also suggests getting quotes from two or three licensed electricians. Hand over those three facts and the quote stops being a guess.

What arrives on the pallet, and what does not

These are complete kits in the sense that matters, and the manual’s own packing list is longer than most buyers expect. Alongside the staves, drain stave, filler staves, end panels, benches, glass door and doorknob assembly, banding assembly and cradles, the crate holds the heater with its mounting bolts and stones, a heater fence, a temperature sensor guard, two backrests, a bucket and ladle, and a thermometer. Check every line of that list against your boxes the week it lands. Two things are optional by design, and those are what catch people out.

There is no floor kit in the standard crate. A barrel’s bottom staves curve, so the floor is a curved surface with a drain hole bored into the center stave. Almost Heaven sells a flat floor kit separately, in pre cut clear cedar sections that rest on that curve and are free standing, so it fits an existing sauna as easily as a new one. Plenty of owners skip it and live with the curve. Decide which of those you are before delivery day.

There is no roofing either. Almost Heaven’s manual states that over time water may seep between the staves because softwood is porous, that this will not hurt the sauna and evaporates once the heater runs, and that if full waterproofing is wanted then shingles or other roofing material can be installed on the top portion, or you can buy the optional roof kit from almostheaven.com. Some editions of the manual point instead to a rain jacket that covers the top of the barrel. That is fair and not a defect, but decide it up front if your barrel is going under trees or somewhere it will hold snow.

You also need a base, though less of one than people assume. The manual asks for a surface that is firm, level and able to carry a load it puts at over 1,000 pounds with people inside. A deck or concrete slab is one option, and the manual says plainly that if the sauna sits directly on the ground you only need the cradle supports resting on paver stones or cinder blocks so they do not settle in. It also notes that most garage floors, basement floors and decks are deliberately sloped for drainage, that a slight slope is not an issue but a pronounced one needs shimming, and that an uneven surface makes the staves fit poorly. On a windy site the manual’s concern is the door rather than the shell: take extra precautions so it cannot blow open in a gust.

On assembly time, Almost Heaven’s own answer is that two or three people can generally put a sauna together in a handful of hours, with cabin style saunas the exception at two to three full days. That matches what we see on barrels. Plan a day with a second pair of hands, not a fortnight.

What a curbside freight delivery actually looks like

Almost Heaven publishes the Morgan at 685 pounds and the Vista at 950, and the Escape cabin at 1,175. Those crates arrive by LTL freight, curbside, and Costco quotes roughly three to four weeks from order. Curbside means the truck reaches the end of your driveway and the pallet comes off the back on a liftgate. It does not mean a crew walks it to the back yard, it does not mean anyone opens it, and it does not mean the driver will bring it into a house or garage. Almost Heaven adds one caveat worth reading before you order: the liftgate offload is excluded on cabin saunas and larger barrels, so on the heaviest units you may need to arrange your own means of getting the crate down. It also recommends at least two people on site to take delivery, and the freight cannot be delivered without a signature.

Sign carefully, because this is where the money is. Shipping damage is one of the larger categories in our support corpus, and the failure that sticks with us is the quiet one. On one barrel delivery a pallet jack’s wheels rolled off the edge of the liftgate during unloading, the pallet dropped under full load, and two bench boards shattered where they attach to the support arm. The outside of the packaging looked undamaged. The owner found it on unpacking, days later, after signing a clean delivery receipt.

So photograph the pallet on the truck before it comes off, photograph it on the ground, and walk all four sides before you sign. If it visibly dropped, write that on the delivery receipt even if the cardboard looks perfect. Then open the crate the same week and check the contents against the packing list in the manual. Missing and mis cut parts happen at every price point, and every claim is easier in week one than in month three.

What barrel owners actually call us about

We keep every technical support thread we have ever handled, 1,172 of them, and the cases we have mined out of them break down in a shape most buyers do not expect: controls lead at 307, heaters 258, installation 161, parts ordering 172, lighting 92, shipping damage 83 and the room itself 67. Of those mined cases, 178 involve a barrel. Almost nobody’s problem is that they bought the wrong sauna. It is a specific, solvable thing on build day or in the first month. What follows is drawn from barrels across every brand we support rather than from any one manufacturer, so treat it as what barrels do, not as a list of anyone’s defects.

The door is the number one build day issue on a barrel, and it is almost always the same cause. The door has to be pushed far enough into the opening that its outside face sits flush with the outside face of the barrel wall. Install it proud of the wall and the exterior trim will not span the frame, at which point people conclude the wrong trim shipped. It usually did not. Check your own model’s manual for the exact setback, because it differs between makers. The related pattern is over tightening the door frame screws, which bows the frame and opens a gap that grows over months.

The second pattern is a barrel that will not reach temperature because heat is escaping around the door. In one case the magnetic door components had been installed in reverse, magnet on the jamb and sensor in the door instead of the other way round, so the door never seated against the weather stripping. Steam visibly leaking around a closed door is a seal problem, and swapping the heater will not fix it.

The third is stones. Harvia’s KIP manual lists stones packed too tightly, restricting airflow, as a cause of a room that will not come up to temperature, and we have watched a high limit cutout trip for exactly that reason. Stack them loosely enough for air to move through the basket, and do not bury the elements.

The last one is not a fault at all, and it is the most useful thing we can tell a first time barrel owner. Barrels stratify hard. The Harvia KIP manual publishes the gradient in plain numbers: 180 degrees F above the heater equals 165 on the opposite wall, 140 at upper bench level and 120 lower down. We have measured a barrel reading 194 degrees at the sensor and about 144 at the bench, confirmed as normal heat stacking rather than a fault. The controller is not lying. It reads air near the ceiling, which is where the sensor belongs. That same manual asks for at least 30 minutes of heat up time, puts the thermometer 6 inches below the ceiling above or close to the heater, and gives 160 to 185 degrees F as normal sauna temperature. If your bench feels cool, sit higher and run longer before suspecting the heater.

Where a Costco sauna is the right call

Plainly: if you want a cedar barrel with a Harvia heater on a real budget, and you have a level spot, a 240 volt circuit and a day with a friend, the Costco option is a good buy and we will say so. The manufacturer is real, the heater is a brand with published parts, and the return position is unusually good. Saunas do not appear on Costco’s 90 day list, which covers televisions, projectors, major appliances, computers, tablets, cameras and phones, so they fall under Costco’s general satisfaction guarantee instead. That is a stronger backstop than a sauna buyer normally gets, and we will not pretend otherwise.

Where it is worth talking to a specialist first is when a detail has to be chosen rather than accepted: a wood burning stove instead of electric, a different heater output than the one bundled, thermally modified wood, a porch, a floor kit designed in from the start, or Wi-Fi control on a model that does not already bundle it. Those are configuration decisions, and a warehouse listing is not built to make them with you. The difference is about fit rather than about who is better. Our sauna kit buyer’s guide walks the same decisions, and if you want a heater sized against your actual room volume, we do that on the phone at (844) 565-1113 in about ten minutes.

Costco sauna questions

Are Costco saunas any good?

The outdoor barrels are, on their own terms. Red cedar, built by Almost Heaven in West Virginia, fitted with genuine Harvia heaters at 6.0 kW on the smaller models and 8.0 kW on the six person outdoor models. By Harvia’s own published room volume bands, those heaters are correctly sized for the rooms they ship in. What you give up is configurability, not build quality.

Who makes Costco’s barrel saunas?

Almost Heaven Saunas, a West Virginia manufacturer whose business Harvia of Finland acquired in 2018, which is why the bundled heater is a Harvia, and on the Vista, Valkea and Oasis specifically a Harvia KIP with built in controls. Costco’s infrared cabins are a separate line, sold as Dynamic and made by Golden Designs.

Do Costco barrel saunas come with a floor and a roof?

No to both, by design rather than by omission. The barrel floor is the curve of the bottom staves with a drain hole bored in the center stave, and Almost Heaven sells a flat floor kit in pre cut clear cedar sections that rests on that curve. Its manual states that water may seep between staves because softwood is porous, that it evaporates once the heater runs, and that shingles, other roofing material or Almost Heaven’s optional roof kit can be added to the top portion for full waterproofing.

What electrical does a Costco barrel sauna need?

A dedicated 240 volt circuit installed by a licensed electrician. A 6.0 kW Harvia KIP draws 25.0 amps on #10/2 copper per Harvia’s manual, and an 8.0 kW draws 33.3 amps on #8/2. Almost Heaven requires copper with 90 degree C insulation, rules out aluminum, and asks that all wiring meet national, state and local codes. No traditional model runs on a household outlet. Only the plug in infrared cabins do, on 120 volts.

Does a barrel sauna need a concrete pad?

Not necessarily. Almost Heaven’s manual asks for a surface that is firm, level and able to carry a load it puts at over 1,000 pounds with people inside. A deck or concrete slab works, and so does bare ground provided the cradle supports rest on paver stones or cinder blocks so they cannot settle. It warns that most decks and garage floors are sloped for drainage, so a pronounced slope needs shimming before assembly.

Will a Costco barrel sauna get hot enough in a cold climate?

Usually, with a caveat. Harvia’s room volume bands assume an insulated room and say nothing about outdoor ambient temperature, and because a barrel is solid timber we apply Harvia’s own 1.5 multiplier for log style walls before reading the table. We have handled a 6 kW barrel that would not pass about 150 degrees in mid twenties Fahrenheit weather. In a cold climate, choose the model with more kilowatts rather than more seats, and allow at least 30 minutes of heat up before judging it.