Portable gas heater: which type to buy
Updated: 21 October 2026
You searched for a portable gas heater and amazon.co.uk has piled three machines into one list. A butane cabinet, a direct-fired propane blower and a cartridge heater-stove do not heat the same space. This page decides the type, the fuel, the regulator and the safety lines the listing has to print. The ranked eleven listings are on the [gas heater comparison](/hub/portable-heaters/gas-heater). Those listings were read on 19 October 2026. This is not a lab test. A qualifying purchase can earn a commission at no extra cost to you.
You searched for a portable gas heater and amazon.co.uk has piled three machines into one list. A butane cabinet, a direct-fired propane blower and a cartridge heater-stove do not heat the same space.
You searched for a portable gas heater and amazon.co.uk has piled three machines into one list. A butane cabinet, a direct-fired propane blower and a cartridge heater-stove do not heat the same space. This page decides the type, the fuel, the regulator and the safety lines the listing has to print. The ranked eleven listings are on the gas heater comparison. Those listings were read on 19 October 2026. This is not a lab test. A qualifying purchase can earn a commission at no extra cost to you.
Our top picks
| Badge | Product | Heater type | Fuel | Regulator and hose | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  NJ The right choice NJ-H2 4.2 kW cabinet | Cabinet | Butane | 21 mm clip-on and hose | 8.7 | about £99.90 | View offer |
| Best value |  Straame Straame foldable 4.2 kW | Cabinet | Butane | 21 mm clip-on and hose | 8.4 | about £64.99 | View offer |
| Alternative |  ALINI ALINI 15 kW propane blower | Direct-fired blower | Propane | Propane regulator and 1.5 m hose | 6.5 | about £75.99 | View offer |
On this page
Three portable gas heaters, not one
Start with the room. A cabinet hides a refillable bottle and heats with ceramic plaques. In this set those cabinets sit around 1.5 kW, 2.8 kW and 4.2 kW, and they weigh roughly 8 kg to 10.2 kg empty. That is the machine for a ventilated living room or garden office, if the manual allows the room and you can use butane. A direct-fired blower sends the warm air and the exhaust together, so the 10 kW and 15 kW listings are workshop tools. A cartridge heater-stove is about 1.3 kW camping kit. Read the cabinet or blower page before a 15 kW figure tempts you. If people will sleep in the room, use the indoor safety page.
Fuel, bottle, and regulator
Liquid Gas UK treats domestic mobile heaters as butane only. Calor puts butane’s boiling point at about −2 °C and propane’s at about −42 °C, and butane regulators around 28–30 mbar against propane around 37 mbar. A butane cabinet in a freezing shed can stop vaporising. In England, Scotland and Wales, Calor’s buyer’s guide uses a 21 mm clip-on on blue butane cylinders. Northern Ireland uses a 35 mm jumbo clip-on. The cylinder is extra on every cabinet in this set. The foldable Straame includes a 21 mm regulator and hose. The other Straame’s included line says heater only. Cozybrite’s bullets name LPG, butane and propane together. If the listing cannot name one fuel, it is not the cabinet to learn on.
What the listing must say
An oxygen depletion sensor, a flame-failure device and tip-over protection are three different lines. The sensor is a last resort if the air gets poor. It does not make a sealed room safe, and it does not authorise a bedroom. The foldable Straame prints the sensor, flame failure and an anti-tilt switch, plus a 21 mm regulator and hose, at about £64.99. The other Straame, also about £64.99, claims a shut-off if it overheats or is tipped, and it does not print an oxygen depletion sensor or flame failure. If those words are missing, treat them as absent.
Output and price in this set
BS EN 449 stops at 4.2 kW for domestic flueless heaters, which is why the cabinets cluster there and the 10 kW and 15 kW listings are blowers. Only those two blowers state a burn rate: 0.73 kg/h on the DAHTEC and 1.09 kg/h on the ALINI. This page does not invent a pence-per-hour figure for the cabinets. On these amazon.co.uk listings, cartridge heater-stoves run from about £24.99 to about £36, cabinets around 4.2 kW from about £61.99 to about £99.90, the ALINI at about £75.99 and the DAHTEC at about £219. Calor’s own Super Heat 4.2 kW cabinets were £109 on the Calor Appliances shop. A muddled fuel line at about £61.99 is not automatically better value than the NJ-H2 at about £99.90 with 637 reviews.
Common questions
What kind of portable gas heater do I actually need?
You need the machine that matches the room, not the highest kilowatt number on the search page. A butane cabinet is the domestic type in this set, up to 4.2 kW, for a ventilated room the manual allows. A direct-fired propane blower is for a workshop that can lose the exhaust. A 1.3 kW cartridge stove is camping kit. If you have not chosen the room, you have not chosen the heater.
Butane or propane for a room?
For a domestic mobile cabinet, Liquid Gas UK’s line is butane only. Propane vaporises in colder weather, which is why the blowers in this set are propane, and it is also why a propane bottle is the wrong upgrade for a butane cabinet. Butane’s boiling point is about −2 °C. If the bottle is stored in a freezing outbuilding, a butane cabinet can struggle before the plaques are even lit.
Does it have to show an oxygen depletion sensor?
For a cabinet you intend to use in a home, yes, you should see the words on the listing, written separately from flame failure and tip-over. The foldable Straame prints them. The other Straame at the same £64.99 price does not print an oxygen depletion sensor. The sensor is a last resort. It is not a reason to shut the window or to use the heater where people sleep.
Will a 21 mm regulator fit in Northern Ireland?
Calor’s buyer’s guide uses a 21 mm clip-on for blue butane cylinders in England, Scotland, and Wales, and a 35 mm jumbo clip-on for Northern Ireland. A 21 mm regulator in the box is the right conversation for Great Britain. It is the wrong assumption if the bottle you refill is on the Northern Ireland fitting. Check the cylinder you already own before you trust the included clip.
Is 4.2 kW enough, or should I buy 15 kW?
4.2 kW is the top of BS EN 449 for a domestic flueless heater, which is why the cabinets stop there. 15 kW in this set is the ALINI blower, a direct-fired propane heater with the exhaust in the airstream, not a stronger living-room cabinet. If the room is a ventilated living space, more kilowatts of that second type is the wrong purchase. The cabinet or blower page sets out when the workshop case is real.
Related pages
Sources
Public UK sources on gas safety, LPG and carbon monoxide. Listing prices, stars and review counts are from amazon.co.uk on 19 October 2026.
- Gas Safety (Installation and Use) Regulations 1998 (retrieved 19 October 2026)
- HSE — Safety in the installation and use of gas systems and appliances (L56) (retrieved 19 October 2026)
- HSE — Gas safety checks for landlords (retrieved 19 October 2026)
- HSE — Carbon monoxide on construction sites (retrieved 19 October 2026)
- NHS — Carbon monoxide poisoning (retrieved 19 October 2026)
- Liquid Gas UK — butane cabinets, BS EN 449 and hoses (retrieved 19 October 2026)
- Calor — The difference between butane and propane (retrieved 19 October 2026)
- Calor — Guidelines for the safe use of mobile heaters (retrieved 19 October 2026)