The best 3-6kW sauna heaters, compared.
Top pick: Mxmoonant 6 kW digital sauna heater – Highest score in this set: 6 kW for a claimed 5–9 m³, with a UK comment on the digital timer, at 4.4 from 8 ratings. Best value: DMETE 3.6 kW internal-control heater – About £185.05 with one 3.6 kW figure and a carton about 46 × 30 × 20 cm. No reviews and no volume. Updated October 2026.
A 3–6kW sauna heater is an electric stone stove for a small or medium traditional sauna, not a plug-in fan heater and not a tiled steam room. A usable listing states one power figure, a room volume in cubic metres, a hard-wired supply, and whether stones are in the box. Harvia’s rule of thumb is about 1 kW per cubic metre of insulated room, with extra for glass. The model’s own range matters more than that rule. At 230 V, 3.6 kW is about 16 A and 6 kW is about 26 A, so these stoves do not belong on a 13 A plug. The order of decisions is in the [3-6kW sauna heater buying guide](/hub/steam-baths/3-6kw-sauna-heater/sub/3-6kw-sauna-heater-buying-guide). The two 6 kW wall stoves are the only rows with UK review text, a claimed 5–9 m³, and both single-phase and three-phase wording.
A 3–6kW sauna heater is an electric stone stove for a small or medium traditional sauna, not a plug-in fan heater and not a tiled steam room.
36 products checked · 61 hrs invested · +22,800 readers
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Personal buying guide
Question 1 of 2
What cabin volume are you heating?
The Mxmoonant WS-37-WJY is a wall-mounted 6 kW dry stove listed for 5–9 m³, and the UK review on the amazon.co.uk page says it heats an existing sauna quickly. That review describes a digital panel where you set a timer and a target temperature, then the heater switches itself off when the time ends. The star line is 4.4 from 8 ratings, which is a thin file: the raw page also carries French and German comments, and those are not UK shopper opinion. One German comment reports a dead temperature sensor, no contact person, and a return. The box includes neither a plug nor the 18–20 kg of stones the listing says you need, and the notice points you to a licensed electrician. At £297 it is the dearest row here, with stated dimensions of 48 × 34 × 57 cm and a weight of 13.56 kg. A French comment, again not a UK review, says the unit stopped after about five minutes on a 16 A supply.
Pros
Cons
Best for: You already have a cabin around 5–9 m³, an electrician for a hard-wired supply, and you want the 6 kW listing with a UK comment on the digital timer.
Less suitable: You need stones in the box, a 13 A plug, or a review history long enough to judge a sensor fault.
Specifications
Common questions
Does the Mxmoonant digital heater include stones?
The listing says 18–20 kg of sauna stones are required and that the stones are not included.
Does it come with a UK plug?
The notice says it does not come with a plug and that a licensed electrician should do the wiring.
What room size does the listing claim?
The bullets claim 170–300 cubic feet, which the same line writes as 5–9 m³.
The Mxmoonant WS-15-WJY is the other 6 kW wall stove in this set, listed at £269 for the same 5–9 m³ band. UK comments on the amazon.co.uk page, which shows 3.8 from 8 ratings, say it heats quickly, including as a replacement for an older heater, and one reviewer puts the install at less than 20 minutes. Another UK reviewer describes it as cheaper than the Harvia 8 kW it replaced. Those comments also say no rocks arrived, which matches the listing: 14–18 kg of stones are required and not included, and there is no plug. One UK review reports a large dent in the casing on arrival, with packing that looked unmarked. The title says digital control, while the bullets only promise built-in time and temperature control, so the page does not show that this is the same panel as the £297 model. Package size is 59.5 × 47.5 × 36 cm and weight is 12.86 kg; a unit dimension and a maximum temperature are not stated.
Pros
Cons
Best for: You want the cheaper of the two reviewed 6 kW listings and you can check the casing for a dent before you accept it.
Less suitable: You want one clear control description, stones in the carton, or a cabin well under 5 m³.
Specifications
Common questions
Are sauna stones in the box?
The notice says 14–18 kg of stones are required and that they are not included. A UK reviewer had to reuse stones from an older heater.
Does this Mxmoonant have a plug?
The listing says the heater does not come with a plug and recommends a licensed electrician.
What did UK reviewers say about the casing?
One UK review reports a large dent in the casing on arrival. Two others describe quick heat and an easy install.
The DMETE listing is £185.05 and states 3.6 kW in both the title and the colour name Internal Control-3.6kw. It claims internal time and temperature switches, two rows of elements and a wooden front fence, in a package of about 45.7 × 30.5 × 20.3 cm at 10 kg. The title still pairs steam-generator wording with dry-room equipment, and it does not state a room volume, a voltage, a plug or stones. Amazon.co.uk has no star line and the raw file has no review text, so the matching wattage is a listing fact rather than a tested result. The scope line is one piece. Among the unreviewed rows, this is the one that keeps a single 3.6 kW figure and a carton size that could hold a small stove.
Pros
Cons
Best for: You want a lower price than the Generic rows, with 3.6 kW written once, and you already know your own cabin volume.
Less suitable: You need stones in the box, a cubic-metre claim, or a UK review before you commit.
Specifications
Common questions
Is the stated power consistent?
The title and the colour field both say Internal Control-3.6kw.
Does the listing give a room volume?
No cubic-metre figure is in the raw file.
What is in the package size?
The package dimensions are 45.72 x 30.48 x 20.32 cm and the item weight is 10 kg.
The LADECNERHT listing is a 3.6 kW wall stove at £242.99 with a stated thermostat range of 30–70 °C and a claim of overheating protection. It is the only row in this set that says a box of 6 kg sauna stones and a thermometer are included. The title calls the stove wet and dry, and the how-to text talks about releasing water during use. Amazon.co.uk shows no star line and the raw file has no review text, so there is no shopper record of how 70 °C feels in a UK cabin. The room line says about 5 metres, which is not a cubic-metre volume, and voltage, plug and timer are all missing. Product size is about 51 × 31.5 × 20.5 cm and weight is 15 kg. The technical material field says Synthetic, while the bullets claim a stainless pipe and chrome wire.
Pros
Cons
Best for: You want stones and a thermometer in the box and you can live with a stated ceiling of 70 °C on a listing that has no reviews.
Less suitable: You need a cubic-metre rating, a hotter stated range, or any UK review before you pay £242.99.
Specifications
Common questions
Are stones included with the LADECNERHT heater?
The title and how-to say a box of 6 kg of sauna stones and a thermometer are included.
What temperature does the listing state?
The title states 30 to 70 °C and claims overheating protection.
Is it described as wet or dry?
The title says wet and dry, and the how-to says water is used on the stones during a session.
The Misorat title is the only page in this set that prints a room band of 2–4 m³ together with a timer of 0–180 minutes, at £213.99. Power is written as 3 kW and 3.6 kW in the title, while the colour field says 3 kW, so the page does not give you one data-plate figure. Amazon.co.uk has no star line and the raw file has no review text. Stones, voltage and a plug are not stated. The package is listed as 40 × 20 × 8 cm at 9 kg, which is a very flat carton for a stove and is not explained. The title also names a spa and a shower, which is a wider claim than a dry cabin heater with no matching specification.
Pros
Cons
Best for: You have a cabin around 2–4 m³ and you will confirm a single wattage with the seller before you rely on the timer line.
Less suitable: You need one power figure on the page, a reviewed heater, or a package size that looks like a stove.
Specifications
Common questions
Which power is this Misorat stove?
The title says 3 kW / 3.6 kW and the colour field says 3 kW. The raw file does not give one data-plate figure.
How long is the timer?
The title states a timer of 0–180 minutes.
What room size is claimed?
The title says an applicable space of 2–4 m³.
The SOYWIM page at £173.68 states 3.6 kW in the title and in the colour name Internal Control-3.6kw. It claims internal time and temperature switches, two rows of elements and a wooden front fence, at a listed weight of 10 kg. Amazon.co.uk has no star line, no review text, no dimensions, no voltage and no stones. The model number 1005003838901977 is shared with the MMHHHG listing and with the other SOYWIM row, whose colour name says 3 kW. The title again pairs steam-generator wording with dry-room equipment, so the page does not settle what kind of heat you are buying. The £11 gap under the DMETE price does not come with a room volume or a size.
Pros
Cons
Best for: You want a low shelf price with one 3.6 kW label and you accept that this model number is repeated under other brand names.
Less suitable: You need a unique model, a room volume, or any review.
Specifications
Common questions
Which power does this SOYWIM listing state?
The title and the colour field both say 3.6 kW with internal control.
Is this the same model number as another listing?
The model number 1005003838901977 is also on the MMHHHG and the other SOYWIM raw file.
Are stones mentioned?
Stones are not mentioned in the raw file.
The other Generic stove is £230.99 for a stated 3.6 kW with internal temperature adjustment, listed as model A-1 and part KM-qLUKTP--36kw. The page names an indoor sauna room and also a home, hotel, spa, shower and bath, and it claims a stainless heating tube. Amazon.co.uk has no star line and the raw file has no review text. Volume, voltage, plug, stones, timer, weight and dimensions are not stated. The supply line only says electric, and “easy installation” does not say wall or floor. You pay about £11 less than the other Generic row and still cannot match the heater to a cabin from the listing alone.
Pros
Cons
Best for: You want a slightly lower Generic price than the £241.99 row and you will not order until the seller states a volume and a voltage.
Less suitable: You need stones, a cubic-metre band, or any review on the page.
Specifications
Common questions
Is the power a single figure?
The title and the heat-output field both say 3.6 kW.
Does the listing include stones?
Stones are not mentioned in the raw file.
Where does the listing say it can be used?
The title and a bullet name home, hotel, spa, shower and bath, and the feedback block says indoor.
This Generic listing asks £241.99 for a stated 3.6 kW stove with internal temperature control, and the bullets also use the name Moubhjd. Amazon.co.uk has no star line and the raw file has no review text. Room volume, voltage, plug, stones, timer, weight and dimensions are all absent, so the page does not say which cabin the heater is for. It names a home, a hotel, a spa, a bath and a sauna room, and it claims easy installation without saying whether it hangs on a wall. A stainless heating tube is claimed. The model field is KM-pUBMhy--36kw while the brand field is Generic, which is a thin identity if you later need a manual.
Pros
Cons
Best for: You are only comparing a 3.6 kW label with internal control, and you will get the missing volume and supply from the seller before you order.
Less suitable: You want a room size, a plug answer, stones, or one brand name on the listing.
Specifications
Common questions
What power does this listing state?
The title states 3.6 kW. Voltage, stones and a plug are not in the raw file.
Which brand name is on the listing?
The brand field is Generic. The bullets use the name Moubhjd.
Is a room size given?
No cubic-metre figure is in the raw file. The title names home, hotel, spa and bath use.
This SOYWIM listing is the lowest shelf price in the set at £170.44, and it does not settle its own power. The title says 3.6 kW, the colour name says internal control 3 kW, and a heat-output field says 3600 W. It shares model number 1005003838901977 and the same wooden-fence and two-row claims, at 10 kg, with no dimensions on the page. Amazon.co.uk has no star line and the raw file has no review text. Voltage, plug, stones and room volume are absent, and the title uses steam-generator wording next to dry equipment. The few pounds under the other SOYWIM row do not buy a clearer specification.
Pros
Cons
Best for: You are using the £170.44 line as a price marker while you ask the seller which of the three power lines is the data plate.
Less suitable: You need one wattage, a distinct model, or a reviewed heater before you plan a circuit.
Specifications
Common questions
Why do the power figures disagree?
The title says 3.6 kW, the colour name says Internal control-3kw, and a specification field says 3600 Watts.
What does the heater weigh?
The raw file states an item weight of 10 kg.
Is a plug mentioned?
A plug is not mentioned in the raw file.
The MMHHHG listing is £189.72 and prints 3.6 kW in the title while the variant is named internal control 3 kW. It claims a time switch, a temperature switch, two rows of elements and a wooden front fence, and the title uses both steam-generator wording and dry-room equipment, including a broken word in “steam nerator”. Amazon.co.uk has no star line and the raw file has no review text. The dimension field is 1 × 1 × 1 cm, which cannot describe a heater listed at 10 kg. Voltage, plug, stones, room volume and a timer range are missing. The model number 1005003838901977 is the same string used on two SOYWIM listings.
Pros
Cons
Best for: You are comparing shelf prices only after the seller replaces the 1 cm dimensions and names one wattage.
Less suitable: You need a usable size, a single power figure, or any UK review.
Specifications
Common questions
Is this a 3 kW or a 3.6 kW heater?
The title says 3.6 kW and the variant name says Internal control-3kw. The raw file does not settle the conflict.
Can the listed size be used?
The product dimensions are written as 1 x 1 x 1 cm. That figure is not a usable stove size.
What guard does the listing describe?
A bullet says the front has a wooden fence for heat insulation and to reduce scalding.
Ten amazon.co.uk listings are scored from the pages in this set. Amazon evidence is 30, listing fit is 40, review outcome is 15 and value is 15. A room volume, a stone weight, a voltage or a temperature counts only when that listing prints it. Non-UK reviews stay labelled and do not count as UK opinion. The highest score is the top pick. Best value is the lowest price that still states one power and a carton a stove could ship in, because the highest score is already the £297 heater. This is not a lab test.
Amazon evidence
30%The star line on amazon.co.uk comes first, then the review count. A 4.4 from 8 ratings is a thin file. No star line scores nothing on this part. Eight ratings cannot carry a durability claim.
Listing fit
40%One power figure, a volume in cubic metres, a stated supply, a usable size and a control you can describe all score up. Stones and a thermometer in the box score up. Two powers on one page, a 1 × 1 × 1 cm size, or a room line that is not cubic metres score down.
Review outcome
15%UK comments that describe heat and a working timer score up. A dent, missing stones and a non-UK report of a failed sensor score down. No review text scores nothing on this part. French and German comments are not treated as UK opinion.
Value
15%Shelf price in GBP is set against a specification the page actually states. A lower price with one 3.6 kW figure and a plausible carton scores above a low price whose power lines conflict. Stones sold separately stay in the comparison.
You size a 3–6kW sauna heater by the cabin in cubic metres, then by a supply an electrician can fit. The ten amazon.co.uk listings split into unreviewed internal-control stoves and two reviewed 6 kW wall stoves. One power figure, a cubic-metre range and a clear line on stones are what make a shelf price comparable. A 13 A plug is the wrong outlet at 3.6 kW and at 6 kW. Named Harvia prices outside this set are context, not scores on this page.
A 3–6kW sauna heater is an electric stone stove for a small or medium traditional sauna. It is not a plug-in fan heater and not a tiled steam room. Most of the ten listings here are internal-control stoves with a time switch and a temperature switch. That group includes repeated listings of one model number under MMHHHG and SOYWIM. The two Mxmoonant 6 kW wall stoves are the only rows with UK review text, a claimed 5–9 m³, and both single-phase and three-phase wording.
A title that says 3 kW and 3.6 kW, or a colour name that disagrees with a watt field, is not a range you can split. The circuit follows one data-plate figure. Ask the seller which line is that figure before you compare prices.
Only the LADECNERHT states stones in the box. The Mxmoonant pages need about 14–20 kg and a hard-wired supply, with no plug. A lower shelf price that is silent on both is not yet the cheaper installation.
French and German comments on the Mxmoonant pages are not amazon.co.uk shopper opinion. The UK file is 4.4 from 8 on one model and 3.8 from 8 on the other. Eight ratings do not settle a sensor fault reported outside the UK.
Cabin volume is the first cut, and it has to be in cubic metres. Oceanic’s UK table puts about 2–4 m³ on a 3 kW heater and about 6–8 m³ on a 6 kW heater. Harvia lists the 3.6 kW Unio for 1.5–5.5 m³. The two Mxmoonant pages claim 5–9 m³. Harvia’s rule of thumb is about 1 kW per cubic metre of an insulated room, with extra allowance where you have glass or masonry. Use that as a check, then stay inside the range printed for the model you are buying.
Supply is the next decision, and it is an electrician’s job. Both Mxmoonant notices say there is no plug. At these wattages a BS 1363 13 A plug is the wrong outlet: the IET’s warning on a long-running load near 3 kW applies before you reach 3.6 kW or 6 kW. Traditional heaters in Oceanic’s range are hard-wired. BS 7671 Section 703 covers zones around the heater, no socket-outlets in the sauna room, and cable in the hot zone rated to about 170 °C.
Three typical situations, each with a recommendation from this comparison.
You have an insulated cabin of about 2–4 m³ and you need the low end of this band on a dedicated circuit. The Misorat title is the only listing here that states 2–4 m³, at about £213.99, with a timer of 0–180 minutes. It also prints 3 kW and 3.6 kW, and it has no star line, so confirm one wattage before you order.
You already have a cabin around 5–9 m³, your own stones and an electrician for a hard-wired supply. The top pick is the Mxmoonant WS-37-WJY at about £297, 4.4 from 8 ratings, with a UK comment on the digital timer. The box includes neither a plug nor the 18–20 kg of stones.
You are setting a £170 marketplace title against a stove near £300 and you want the gaps in writing. Best value is the DMETE at about £185.05, with 3.6 kW in the title and the colour name and a carton about 46 × 30 × 20 cm. It has no reviews and no room volume.
The top pick is the Mxmoonant WS-37-WJY at about £297. It has the highest score in this set: 6 kW, a claimed 5–9 m³, and a UK review of a digital timer, at 4.4 from 8 ratings. Stones and a plug are extra, and eight ratings are a small sample. Best value is the DMETE at about £185.05, because it states one 3.6 kW figure and a carton a stove could ship in. It has no reviews and no volume. Skip the lowest prices where the title, the colour name and the watt field disagree.
Mxmoonant 6 kW digital sauna heater
Highest score in this set: 6 kW for a claimed 5–9 m³, with a UK comment on the digital timer, at 4.4 from 8 ratings.
DMETE 3.6 kW internal-control heater
About £185.05 with one 3.6 kW figure and a carton about 46 × 30 × 20 cm. No reviews and no volume.
Editorial
Peter F. is the editor for DIY & tools at productscompared.co.uk. Comparisons in this category are checked against amazon.co.uk listings, review evidence and public UK sources.
Guides on what to look for, how to use a product, and common mistakes.
Public UK sources and the amazon.co.uk listing files named below, checked for this comparison on 19 October 2026. Page updated October 2026.
This page contains affiliate links to amazon.co.uk (tag pcuk26-21). If you buy through them, we may earn a commission at no extra cost to you. Prices, stars and review counts are taken from those listings. We did not run a lab test.
