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Steam generator vs sauna heater

Updated: October 2026

You have one spare corner and two words that Amazon treats as the same product. A steam generator and a sauna heater can both be listed at 4.5 kW, and the titles will not stop you buying the wrong climate. A steam room is a warm, wet cubicle. A sauna is a hot, dry timber room, with a short burst of steam only if you ladle water onto stones. Prices and the full table stay on the [4.5kW sauna heater comparison](/hub/steam-baths/4-5kw-sauna-heater). We used those listings and UK explainers, not a lab, on 19 October 2026. A qualifying purchase through our links can earn a commission at no extra cost to you.

You have one spare corner and two words that Amazon treats as the same product. A steam generator and a sauna heater can both be listed at 4.5 kW, and the titles will not stop you buying the wrong climate.

Our top picks

Caiqinlen Caiqinlen 4.5 kW steam generator

Best overall

Caiqinlen Caiqinlen 4.5 kW steam generator
9.4/10about £193.05
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CGOLDENWALL CGOLDENWALL 4.5 kW steam generator

Rank 2

CGOLDENWALL CGOLDENWALL 4.5 kW steam generator
8.0/10about £426.54
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BGAZA BGAZA 4.5 kW dry sauna stove

Alternative

BGAZA BGAZA 4.5 kW dry sauna stove
1.0/10about £206.87
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On this page
  1. 1.Same kilowatts, different air
  2. 2.Which 4.5 kW listings are steam
  3. 3.The one dry stove in the set
  4. 4.What you cannot mix

Same kilowatts, different air

Steam and Oak puts a sauna at about 70–100°C with low humidity, and a steam room at about 40–50°C in saturated air that needs a waterproof room. Roots describes a generator boiling water into a sealed room at about 40–45°C. A flat with a tanked shower can be the easier steam room, and a hopeless place for a 100°C stove. The listings in our set sit on those two bands, not in a middle. The steam generators are specified at 35–55°C, and the CGOLDENWALL starts at 25°C. The BGAZA stone stove is specified up to 110°C. If you wanted 80°C and dry bench boards, a generator that stops at 55°C will feel like a failed sauna. If you wanted dense steam in a tiled pod, a stove at 110°C is the wrong tool and a fire risk in a room that was never built as a sauna.

Which 4.5 kW listings are steam

Four of the five kept listings are steam generators. The LANYU SYNERGY is listed for 4.5 m³ (159 ft³), and the title includes a steam head. The CGOLDENWALL states 3–4.5 m³, self-drain and an aroma head. The Hanchen states a room within 4 m³. The Caiqinlen does not state a room volume or a steam head. Those volumes are tighter than a typical sauna-stove band. They describe a shower cubicle or a small pod, not a two-person cabin with a glass front. The 4.5kW sauna heater room size page does the arithmetic. What they share is the building: a tanked, drained, sealed space, a generator outside that space, and a pipe to a head. The 4.5kW sauna heater installation page is the brief for the electrician and the plumber. None of these four will turn a tongue-and-groove shed into a sauna by kilowatts alone.
Caiqinlen Caiqinlen 4.5 kW steam generator

Testsieger

Caiqinlen Caiqinlen 4.5 kW steam generator
9.4/10about £193.05
View offer

The one dry stove in the set

The BGAZA DKEMOVKOA-4.5KW-1 is the stone stove. Mechanical knobs set temperature and a timer of up to three hours. The stated maximum is 110°C. The listing talks about stone capacity. It does not say the stones are in the box, and it does not state a room volume or a voltage. There is no amazon.co.uk star line. The title still says sauna steam generator and also offers 6 kW and 9 kW. Read the selected 4.5 kW option and the 110°C line before you decide it matches a cabin. Without a stated cubic-metre band, you cannot check it against Harvia's 3–6 m³ for a KIP45 or against Finnmark's typical 4–7 m³ line for 4.5 kW. Those shop figures are for dry stoves. They are not a licence to drop this BGAZA into a steam shower.

What you cannot mix

Do not put a steam generator in an ordinary timber cabin. Saturated air soaks the boards, the insulation and the electrics. The room for a generator is tanked and drained, with falls to a gulley, the way a wet room is built. Do not put the BGAZA stone stove in a tiled steam cubicle and expect a steam room. It is specified as a dry heater to 110°C. Water thrown around a stove that has no stated stone load, in a sealed wet box, is not löyly and it is not a steam bath. Choose the climate first. Steam kit if the room will be tanked and drained. Dry stove if the room will be an insulated cabin of roughly 3–6 m³.

Common questions

What temperature is a steam room compared with a sauna?
Steam and Oak put a steam room at about 40–50°C with saturated humidity, and a sauna at about 70–100°C with low humidity. Roots describes home steam at about 40–45°C. In our listings the generators stop at 55°C, or start from 25°C on the CGOLDENWALL, and the BGAZA stove is listed up to 110°C. The kilowatts match. The air does not.
Can a steam generator heat a timber cabin?
It can switch on. It should not be used as the heater for an ordinary timber sauna. These generators are built for a sealed, waterproof cubicle at steam-room temperature. Continuous wet air in tongue-and-groove timber damages the room. If the cabin is what you have, you want a stone stove rated for that volume, not a 35–55°C boiler.
Can a stone stove run a steam shower?
No. The BGAZA is a dry stove with a 110°C maximum and an unconfirmed stone load. A steam shower needs a generator, a head, a drain and a tanked enclosure held around 40–55°C. Parking a sauna stove in that cubicle gives you the wrong temperature and the wrong moisture, and the stove's own clearances assume a sauna, not a wet room.
Which listings in this comparison are which type?
Caiqinlen, LANYU SYNERGY, CGOLDENWALL and Hanchen are steam generators. Only the BGAZA is a dry stone stove, despite the word steam in its family title. Stated steam volumes are 4.5 m³ (LANYU), 3–4.5 m³ (CGOLDENWALL) and within 4 m³ (Hanchen). Caiqinlen and BGAZA do not state a volume.
What is löyly?
Löyly is the burst of steam you get when water hits the hot stones in a Finnish sauna. The room then returns to hot, dry air. It is not the ongoing saturated atmosphere of a steam room, which sits nearer 40–50°C. You need stones and a stove for löyly. A steam generator does not provide it.
Is there a heater that does both?
Not in this set. Combi heaters, such as Harvia's combi range, put a steamer in a stone stove so one cabin can run drier or more humid sessions. They are a separate product with their own supply and volume. None of the five amazon.co.uk listings here is that machine. Choose steam or dry, then buy the matching type.

Related pages

4.5kW sauna heater buying guide

4.5kW sauna heater

Best 4.5kW sauna heater for a small UK steam cubicle

Install a 4.5kW sauna heater: UK circuit, not a plug

4.5kW sauna heater room size: cubic metres, then glass

Sources

Sources taken from the research digest. Listings were compared for this page in October 2026. A shop price cited in the digest is dated 19 October 2026 and is not an amazon.co.uk price. This page did not run a lab test.

  1. Approved Document P (2013) (retrieved 19.10.2026)
  2. Building Regulations amendment, regulation 6 (retrieved 19.10.2026)
  3. Elec-Mate — sauna electrical installation (retrieved 19.10.2026)
  4. Installer Online — sauna cabin electrical requirements (retrieved 19.10.2026)
  5. Harvia KIP45 (retrieved 19.10.2026)
  6. Finnmark — choosing an electric sauna heater (retrieved 19.10.2026)
  7. Drinking Water Inspectorate — water hardness (retrieved 19.10.2026)
  8. Steam and Oak — steam room versus sauna (retrieved 19.10.2026)