The best Thermia wood stoves, compared.
Top pick: NRG 8 kW multifuel stove Best value: Kuvik titanium wood stove – £36.99 buys 4.7 from 456 ratings, the deepest record here, for an outdoor twig stove. Updated October 2026.
If you searched for a Thermia wood stove, the maker's papers describe a domestic solid-fuel roomheater from Thermia kamini d.o.o. in Viljevo, Croatia. That is not a Swedish heat pump, and it is not a backpacking stove. It does contain eight other wood-burning stoves: three titanium twig stoves, three tent stoves with chimneys, and two multifuel room stoves. In a UK smoke control area, wood may be burned only in an exempt appliance used as the exemption states. Ecodesign is a separate rule and has applied to new solid-fuel roomheaters since 1 January 2022. Output, fuel, and the class split are in the [Thermia wood stove buying guide](/hub/fireplaces-and-stoves/thermia-wood-stove/sub/thermia-wood-stove-buying-guide). The fiche names roomheaters such as Olympus and Minerva at 7.0 kW, energy class A, and 80.03 percent efficiency, and it cites EN 13240. Other names on that sheet run from about 6 kW to 12.5 kW.
If you searched for a Thermia wood stove, the maker's papers describe a domestic solid-fuel roomheater from Thermia kamini d.o.o. in Viljevo, Croatia. That is not a Swedish heat pump, and it is not a backpacking stove.
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Personal buying guide
Question 1 of 2
Where will you use it?
The larger NRG is listed at 8.1 kW in the technical line and 8 kW in the title, weighs 80 kg, and costs £514.99. The glass is given as 306 x 369 mm, the body is steel with a cast-iron door, and the listing states carbon monoxide at 0.07% on wood and 0.04% on smokeless fuel. It claims DEFRA approval, it does not state an Ecodesign line on the listing, and it says the flue pipe is not included. The amazon.co.uk rating is 5.0 from one rating, and there is no written review, so there is no written account of how it burns. HETAS treats about 8 kW and above as a general guide for a large or poorly insulated space, and an oversized stove is the one people tend to run too cool. The coverage line of 123 to 185 square metres is the listing's own claim. Side and rear clearances are not stated, and Thermia's clearances must not be borrowed for this box.
Pros
Cons
Best for: A large or poorly insulated room, only if you accept a listing with no written reviews and you will buy the flue separately.
Less suitable: A small room, a buyer who wants written reviews, or anyone treating 123 to 185 square metres as a measured result.
Specifications
Common questions
Is the flue pipe included?
No. The listing says the flue pipe is not included.
What output does the listing state?
The title says 8 kW. The technical line says 8.1 kW. The glass size on the listing is 306 x 369 mm, and the weight is 80 kg.
The unho with a removable oven weighs 13.8 kg, costs £169.99, and includes six chimney pipes plus windows in the firebox and the oven. The listing says you can bake with the oven fitted or take it off and use the firebox alone. It mentions a temperature gauge and does not state an oven temperature, so that figure is not available. The amazon.co.uk line is 5.0 from one review, dated 7 October 2026: the reviewer likes the oven and still says the chimney and the tent ventilation have to be right. One rating is not a track record. A carry bag is not confirmed. Fire-service guidance still rules out an ordinary tent.
Pros
Cons
Best for: Someone already set on a stove-jack tent who wants an oven module and will not treat one review as a test.
Less suitable: Anyone who needs a proven burner, a stated oven temperature, or a living-room install.
Specifications
Common questions
Can the oven be taken off?
Yes. The listing says you can keep the oven on for baking or remove it and use the firebox alone.
What oven temperature does it reach?
The listing mentions a gauge, but it does not state a temperature. That figure is not available.
The larger Kuvik packs to about 17.1 x 15.9 x 0.5 cm, weighs about 195 g, and is listed at a camping output of 2,600 W, which is not a room-heating figure. It costs £36.99 and includes a carry case, with an assembled size on the listing of about 6.25 x 5 x 5 inches. Across 456 amazon.co.uk ratings at 4.7 it has the deepest review record here, though many written reviews are from the United States and Canada. Reviewers like the flat pack and dislike the constant twig feed, the soot, and, on some units, a slight warp. One US review describes a fat fire on a picnic table that nearly caught, because the tray sits close to the ground, so it needs a non-combustible surface. The listing does not name a maximum pot diameter. It has no flue and it is not a Thermia roomheater.
Pros
Cons
Best for: An outdoor boil on a walk, when you want the best-reviewed twig stove in this set and can keep it off wood.
Less suitable: A lounge, a smoke-control install, or anyone who needs a stove that holds a fire without constant feeding.
Specifications
Common questions
Will different pots fit?
The listing says the rack can take various pot and pan sizes. It does not name a maximum diameter.
Is the 2,600 W figure a room-heating rating?
No. 2,600 W is the listing's maximum energy output for this camping stove. It is not a DEFRA roomheater output.
The NRG at £238.99 is listed at 4.5 kW and 48 kg, which puts it in HETAS's general 3 to 5 kW band for a small room or backup heat, if an installer agrees. It is 4.6 from 30 amazon.co.uk ratings, mostly short UK praise, and one UK reviewer bought it for a motorhome, which is one household rather than a test. The page says DEFRA approved and 2022 Eco Design Ready. That is the seller's claim, and the exact model still has to be on the live exempt list before you rely on it. The body is cast iron, about 525 x 380 x 325 mm, and the included parts list a flue collar rather than a flue pipe. The listing notes short logs as a limit of the firebox, and the reviews are too short to show a repeated fault. It is not a Thermia stove, and the price does not include the hearth, the liner, the labour, or the alarm.
Pros
Cons
Best for: Backup heat in a small room, or a considered motorhome install, once the exact model is on the live exempt list and a proper flue is planned.
Less suitable: A named Thermia, a large room, a rucksack, or a buyer who will not pay for installation.
Specifications
Common questions
Does the listing claim DEFRA approval?
Yes. The amazon.co.uk text says DEFRA approved and 2022 Eco Design Ready. That is the seller's claim. Check the exact model on the live exempt list before you rely on it.
Is the flue pipe in the box?
The included components list a flue collar. The listing does not say a flue pipe is included.
The OneTigris Tiger Roar weighs about 10 kg, costs £219.98, and ships with seven pipe sections, elbows, a Schott ROBAX window, and a spare glass. Across 232 amazon.co.uk ratings at 4.4, reviews praise the heat in a tent and criticise pipes that are thin or hard to join, smoke when the door is opened, a hinge pin missing on one unit, and side panels that bent after a hard burn. The listing's short-term glass rating of 760°C is the seller's material claim, not a room test. A carry bag is not confirmed in the listing. At this price it is the dearest tent stove in this set, and the pipe complaints are why the extra money does not buy a quiet setup. The same fire-service warning applies: it is not a stove for an ordinary nylon tent, and it is not a Thermia roomheater.
Pros
Cons
Best for: A stove-tent comparison where you want the longest review record and a spare glass, and you accept fiddly pipes.
Less suitable: A living room, a tight budget, or a standard nylon tent.
Specifications
Common questions
Are the chimney pipes included?
Yes. The listing includes seven pipe sections, two 45 degree elbows, and two 90 degree elbows, plus a spare glass and a scraper.
Is a carry bag included?
The listing asks the question but does not confirm a bag in the bullet points. Treat the bag as not stated.
The OneTigris ROCUBOID sets up to about 12.7 x 12.7 x 18 cm, weighs about 404 g, and burns twigs or a spirit burner on an inner shelf. It is £32.98, packs to about 15.5 x 16.5 x 1 cm, and includes a nylon case. Across 160 amazon.co.uk reviews at 4.4, UK reviewers use it both ways. It still has no chimney and no DEFRA claim. The same class of sheet-stove reviews complains about soot and about feeding small sticks for the whole boil. At 404 g it is a poor swap if you bought titanium only to match the 115 g Kuvik. It is not a Thermia stove.
Pros
Cons
Best for: A camp cook who wants twigs and a spirit burner in one titanium body, and can carry 404 g.
Less suitable: An ultralight walk, a living room, or a stove you expect to leave unattended.
Specifications
Common questions
Can the ROCUBOID burn more than wood?
The listing says it can be set up for wood, alcohol, or fuel tablets. UK reviews also describe a Trangia-type spirit burner on the inner shelf.
Does it come with a case?
Yes. The listing includes a coyote brown nylon case, and the stove packs to about 15.5 x 16.5 x 1 cm.
The Kuvik compact is a titanium twig stove that packs to about 5 mm and, once open, stands about 115 mm high and 80 mm square for a small outdoor pot. It is £23.99, and one reviewer weighed it at 116 g with the case against a listing figure of about 115 g. Across 40 amazon.co.uk reviews at 4.2, the packed size is the reason to buy it, and some reviewers still found it too small for the pot they carried. It has no flue, no window, and no DEFRA line. Reviews of this titanium sheet-stove class also mention soot, constant twig feeding, and the odd warped or misaligned panel, and several say the box has no printed instructions. It is not a Thermia roomheater, and it does not belong in a fireplace.
Pros
Cons
Best for: A short walk where the grams matter and you will boil a small pot on twigs outdoors.
Less suitable: A living room, a large pot, or anyone who searched for a Thermia log burner.
Specifications
Common questions
Does this Kuvik stove include a carry case?
Yes. The listing includes a lightweight carrying case and says the stove packs down to about 5 mm thick.
Is this a Thermia wood stove?
No. The brand on the amazon.co.uk listing is Kuvik. It is a titanium camping stove, not a Thermia roomheater.
The unho tent stove weighs 9.1 kg, costs £116.99, and comes with a seven-piece chimney, a spark-arrestor cap, and glass in the front and the side. The listing says to use it only in a compatible stove-jack tent, with ventilation, and to keep the chimney clear of fabric. Across 96 amazon.co.uk ratings at 4.1, the weakest average among the stoves here with a real sample, reviews describe a damper pin that came loose, a side window that cracked on a second burn, a missing damper plate, sharp edges, and creosote at a cold spark cap. Those are individual reports, not a failure rate. Devon and Somerset Fire and Rescue Service still says not to burn a stove inside a tent, awning, or caravan entrance. There is no kilowatt output and no DEFRA claim. It is not a living-room log burner and it is not a Thermia.
Pros
Cons
Best for: A buyer comparing tent stoves who wants the chimney in the box and will read the damper and glass complaints first.
Less suitable: An ordinary nylon tent, a bedroom, or a fixed room stove.
Specifications
Common questions
Does the chimney come in the box?
Yes. The listing includes a seven-piece chimney with an adjustable baffle and a spark-arrestor cap, plus guy ropes and stakes.
Can it be used in any tent?
The listing says to use it only in a compatible stove-jack tent with adequate ventilation, and to keep the chimney clear of fabric.
We compared eight amazon.co.uk listings that appear for a Thermia wood stove search: three twig stoves, three tent stoves, and two NRG multifuel stoves. Scores use the listing price in pounds, the stated class and output, and the review count. There was no laboratory burn, and no Thermia model was in the set.
Stove class
30%A twig stove, a tent stove, and a fixed roomheater do different jobs. Thermia's papers describe roomheaters, and none of these ASINs is a Thermia.
Smoke control
25%Wood in a smoke control area needs an exempt appliance used as the exemption states. A DEFRA line on a listing is a claim until the model is on the live list.
Output and fuel
20%HETAS bands are a general guide. A multifuel grate and a flat wood bed are not the same fire, and a camping watt figure is not a room rating.
What the box includes
15%Flue pipe, chimney sections, and a carry case change the real cost. Hearth, liner, labour, and the alarm are extra on a fixed stove.
Review depth
10%A single five-star rating is a weak sample. The 8 kW NRG and the unho oven each have one rating, and the 8 kW listing has no written review.
You will not find a Thermia ASIN in this set, so the useful first step is to name the job. A roomheater, a hot-tent stove, and a titanium twig stove are not substitutes. The prices below are amazon.co.uk shelf prices in pounds. Review counts are the counts on those listings. We did not run a lab fire, and a five-star line from one rating is not treated as a test. Use the class, the listed output, and the exempt-list check before the badge.
A Thermia wood stove, in the maker's papers, is a domestic solid-fuel roomheater from Thermia kamini d.o.o. in Viljevo, Croatia. The fiche names roomheaters such as Olympus and Minerva at 7.0 kW, energy class A, and 80.03 percent efficiency, and it cites EN 13240. Other names on that sheet run from about 6 kW to 12.5 kW. Those models are not ASINs in this set, and a German BImSchV stage 2 mark is not a UK smoke-control exemption.
Ecodesign is an efficiency rule for new solid-fuel roomheaters from 1 January 2022. It does not by itself let you burn wood in a smoke control area. A German BImSchV mark is not a UK exemption either. Search the exact model on the live exempt list.
The Kuvik and ROCUBOID stoves have no flue and no DEFRA line. They are for an outdoor pot. Soot, constant feeding, and a tray close to the ground are why they do not belong in a fireplace.
The 8 kW NRG listing says the flue pipe is not included. The 4.5 kW listing includes a flue collar, not a stated pipe. Hearth, liner, labour, and the carbon monoxide alarm sit outside the stove price.
The 8 kW NRG and the unho oven each show one rating. The 8 kW listing has no written review. That is not a track record, and it is not a lab test.
The first split is the job, not the star rating. Thermia's papers describe domestic roomheaters. Kuvik and the OneTigris ROCUBOID are outdoor twig stoves with no flue. unho and the Tiger Roar are portable stoves that ship with chimney sections. The two NRG models are multifuel room stoves. A 115 g titanium sheet will boil a small pot on a walk. It will not heat a lounge, and it has no DEFRA line.
For a room stove, HETAS's general guide is about 3 to 5 kW for a small room or backup heat, about 5 to 8 kW for many living rooms, and about 8 kW and above for a large or poorly insulated space. The NRG at £238.99 is listed at 4.5 kW. The NRG at £514.99 is listed at 8.1 kW in the technical line and 8 kW in the title. Those figures are the seller's, not a measurement we made. An oversized stove is the one people tend to run too cool, which makes more smoke and soot.
Three typical situations, each with a recommendation from this comparison.
You want a fixed stove for a small room, not a stove that packs into a rucksack. The NRG listed at 4.5 kW is the only domestic stove here with a real sample, 4.6 from 30 ratings, at £238.99. The DEFRA line is the seller's claim, so check the live list and budget for a flue, a hearth, and an alarm.
You want an outdoor boil, and the grams matter less than a deep review file. The larger Kuvik is £36.99, about 195 g, and 4.7 from 456 ratings. It is a titanium twig stove with no flue, so it is the best value for a walk, not for a lounge.
You are comparing tent stoves that ship with pipes, and you will not treat one rating as a test. The Tiger Roar has 4.4 from 232 ratings, pipes in the box, and a spare glass, at £219.98. Fire-service guidance still says not to burn a stove inside a tent, awning, or caravan entrance.
None of these eight listings is a Thermia wood stove. The top pick is Kuvik titanium wood stove, with the highest score in this comparison (8.5 out of 10, from 456 amazon.co.uk reviews). For an outdoor pot, the larger Kuvik at £36.99 is the best value, with 4.7 from 456 ratings, and it is not a roomheater. Tent stoves in this set come with pipes, and fire-service guidance still rules out an ordinary tent.
Kuvik titanium wood stove
£36.99 buys 4.7 from 456 ratings, the deepest record here, for an outdoor twig stove.
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 maker's fiche, checked on 15 October 2026.
This page contains affiliate links. If you buy through them, we may earn a commission at no extra cost to you. The notes use amazon.co.uk listings and public UK sources, not a laboratory test.
