The best cube saunas
Cubes use interior volume better than barrels and look like architecture rather than equipment. The glass front is the trade — here is what it costs you, and who should still take it.
A cube sauna is a rectangular cabin, and its argument over a barrel is geometry: you get usable headroom at the walls instead of a curve that pushes you towards the center. For the same footprint, more of the interior is space you can actually sit up in.
It is also the format that looks like a garden building rather than a piece of equipment, which for a lot of people is not a trivial consideration when the thing has to live in a yard they look at every day.
Quick picks
| # | Product | Best for | Key spec | Price |
|---|---|---|---|---|
| 1 | Smartmak Outdoor Square Sauna, 6–8 Person, Wood-BurningA cube shape and a wood stove together mean no trench, no permit and no electrician — the install cost that sinks most outdoor sauna projects simply is not there. | Cube shape with no electrical run | Wood-burning stove, 6–8 person | |
| 2 | Modern Outdoor Cabin Sauna Kit, Glass Front, Cedar InteriorThe one on this list that will not make your garden look like a barrel yard. A full-glass front costs you heat retention and buys you a view. | Looking like a garden building | Glass front, weather-resistant black exterior | |
| 3 | Benovo Outdoor Barrel Sauna with Porch, Wood or ElectricBeing able to pick the heat source at order time is genuinely rare, and it is the decision that determines your install cost more than any other. | Choosing your own heat source | Wood or electric stove, 4–8 person |
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How we picked
Roof covering and glazing first, because those are the two things that determine whether a cube performs and survives. Heat source second — one of these needs no circuit at all, which is a bigger practical difference than any feature. Timber third. Disclosure throughout: cubes in this category publish more than barrels do, and we have credited it.
The picks in full
Smartmak Outdoor Square Sauna, 6–8 Person, Wood-Burning
Smartmak
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A cube shape and a wood stove together mean no trench, no permit and no electrician — the install cost that sinks most outdoor sauna projects simply is not there.
| Capacity | 6–8 person |
|---|---|
| Shape | Square / cube |
| Wood | Hemlock |
| Heater | Wood-burning stove |
| Roof | Waterproof asphalt shingles |
| Power required | None for the stove |
| Accessories | Included |
What works
- Wood fired means zero electrical infrastructure
- An asphalt shingle roof is actually specified, which barrels rarely are
- Cube geometry uses interior volume better than a barrel at the same footprint
What doesn't
- Hemlock outdoors is a worse choice than cedar over a decade
- Wood firing means a 45-minute lead time and ash management every session
- A chimney through a roof needs correct clearances
Skip it ifyou want heat on a schedule. Wood-fired saunas reward planning and punish spontaneity.
Modern Outdoor Cabin Sauna Kit, Glass Front, Cedar Interior
Generic Amazon listing
#ad We earn a commission if you buy, at no extra cost to you. How this is funded.
The one on this list that will not make your garden look like a barrel yard. A full-glass front costs you heat retention and buys you a view.
| Shape | Cube / cabin |
|---|---|
| Front | Glass panel |
| Interior | Cedar |
| Exterior | Weather-resistant black finish |
| Heater | Not published in the listing |
| Capacity | Not published |
What works
- Cedar interior with a treated exterior — the correct way round
- Cube geometry gives usable headroom at the walls
- Reads as architecture rather than as equipment
What doesn't
- A large glass panel is the biggest single heat loss on the structure
- Heater not specified — assume you are buying one separately
- Capacity unpublished, so bench planning is guesswork
Skip it ifyou live somewhere genuinely cold. Full-glass fronts bleed heat, and in a hard winter you will feel every square foot of it.
Benovo Outdoor Barrel Sauna with Porch, Wood or Electric
Benovo
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Being able to pick the heat source at order time is genuinely rare, and it is the decision that determines your install cost more than any other.
| Capacity | 4–8 person |
|---|---|
| Heater | Wood-burning or electric, buyer's choice |
| Porch | Yes |
| Format | DIY kit |
| Wood | Not published in the listing |
| Circuit | Depends on the heater chosen |
What works
- Heat source is a decision you make, not one made for you
- Porch included rather than an upsell
- Kit format keeps freight cost down
What doesn't
- 'DIY kit' means a genuine weekend of assembly with a second pair of hands
- Wood species not published — ask before ordering
- A wide capacity range complicates heater matching
Skip it ifyou are not comfortable building it. A barrel kit is a real construction project, and a badly assembled one leaks heat forever.
The glass front, honestly
A full-glass front is the single largest heat loss on any outdoor sauna. Glass conducts heat far better than an insulated timber wall does, and a large panel of it will bleed warmth continuously while the heater works to replace it.
| Factor | Full-glass front | Small window or solid |
|---|---|---|
| Heat loss | Highest on the structure | Minimal |
| Warm-up time | Longer | Shorter |
| Running cost | Higher, on every session | Lower |
| Cold-climate performance | Noticeably worse below freezing | Unaffected |
| The view | The reason to buy it | None |
| Feeling of space | Considerable | Enclosed |
Whether the panel is single or double glazed makes a large difference and is rarely published. Ask before ordering — it is the single most useful question you can put to a cube seller.
None of this makes a glass front wrong. If your sauna faces a view and you live somewhere temperate, it is a genuine pleasure and the heat penalty is affordable. If you live somewhere with a hard winter, it is a permanent tax on every session and we would take the solid wall. See best saunas for cold climates.
The wood-fired cube skips the biggest cost
This is the point most worth taking from this page. The Smartmak cube ships with a wood-burning stove, which means no trench, no permit, no electrician and no 240 V circuit. On a suburban lot that is frequently the largest single line in an outdoor sauna budget, and removing it changes what the whole project costs.
What you pay instead is a 45-minute lead time before every session and an ash tray to manage. That is a real ongoing cost in convenience — wood-fired saunas reward planning and punish spontaneity — but it is a cost measured in patience rather than in dollars. The comparison is in wood-burning vs electric.
Roof covering: the cube category does better here
One genuine advantage of the cube format is that a flat or pitched roof is a solved problem, and sellers are more likely to specify the covering. The Smartmak publishes waterproof asphalt shingles. That is exactly the disclosure the barrel category almost never provides, and it is worth weighting.
Where a cube listing does not publish the roof covering, ask. It is the surface that decides how the structure ages, and a seller who cannot answer is telling you something.
Kit or assembled?
Several cubes ship as DIY kits, which keeps freight costs down and is genuinely achievable — but it is a real construction project with a second pair of hands and a weekend, not flat-pack furniture. A badly assembled cabin leaks heat for its entire life, and the leaks are usually at joints you cannot get back to.
If you would rather not, best sauna kits covers what each format actually asks of you, and the foundation guide covers the base that has to be ready either way.
Questions people actually ask
Are cube saunas better than barrel saunas?
Is a glass-front sauna a bad idea?
Do wood-fired cube saunas need electricity?
How much assembly does a cube sauna kit need?
Sources
- Amazon.com — cube and cabin sauna listings, specifications as published by the sellers — checked Sep 7, 2026
- US Consumer Product Safety Commission — carbon monoxide and fuel-burning appliance safety — checked Sep 7, 2026
Read next
Every pick on this page comes from published specifications, not from hardware we own. Read how we pick — including what spec-led ranking cannot tell you.