Garden and stable
You want outdoor propane and a drain habit, for a horse wash or a temporary garden shower. The BW264BC is the 10 L/min outdoor listing with the strongest independent review file. Check the data plate before you connect a cylinder.
Gas water heater comparison 2026
The best gas water heaters, compared.
Top pick: Camplux BW264BC 10 L gas water heater with rain cover – Highest composite score: 10 L/min agrees with 20 kW, and 4.4 from 519 reviews is the strongest independent outdoor sample. Best value: Camplux AY132B 5 L portable gas water heater – Highest price-against-duty score for a complete 5 L/min propane kit at about £150.44, with 4.1 from 201 reviews. Updated 17.10.2026.
A gas water heater is an instantaneous burner, not an electric cylinder and not a combi boiler. On amazon.co.uk the listings are mostly portable outdoor showers for a garden, a campsite, a stable, or a van, plus a few indoor natural-gas heaters with a flue. A portable cylinder heater is not that appliance, and it does not belong in a tent or an awning. Propane regulators are 37 mbar, butane regulators are 28–30 mbar, and UK mains gas is about 21 mbar nominal. Then read litres per minute at a stated temperature rise. Fuel and flue are set out in the [LPG or natural gas](/hub/hot-water/gas-water-heater/sub/gas-water-heater-lpg-or-natural-gas) guide.
A gas water heater is an instantaneous burner, not an electric cylinder and not a combi boiler.
32 products checked · 62 hrs invested · +18,400 readers
9 of 9: Best gas water heaters compared
Swipe for more
1-2 of 9Best overall
Best value
8.6/10
6.6/10
7.1/10
7.2/10
8.4/10
8.5/10
5.6/10
4.1/10
4.3/10
∼ £290
∼ £220
∼ £180
∼ £184
∼ £150
∼ £200
∼ £190
∼ £160
∼ £74
4.4(519)
4.4(518)
4.2(129)
4.1(798)
4.1(201)
4.0(328)
4.0(20)
3.5(15)
3.4(19)
Personal buying guide
Which gas water heater fits?
Question 1 of 2
Where will the burner run?
The best gas water heaters in detail
Our view
The Camplux BW264BC delivers 10 litres a minute at 20 kW outdoors, and across 519 amazon.co.uk reviews rated 4.4 people describe months of daily hot water, dog washing, and horse washing. Reviewers who fitted a 13 kg Calor patio-gas bottle found the supplied 37 mbar regulator clipped on, and several held about 37 °C by keeping the water flow high and the gas low. The rain cap helps when wind knocks the flame out, though a blow-out still means you stop the flow and relight, and the 150 cm shower hose is often called too short and prone to leak at the head. Flame-sensor or jet cleaning comes up when the gas shuts off, and one review describes an internal joint that leaked until only cold water came through. The specification field says Natural Gas while the bullets and Camplux’s UK page describe propane at 37 mbar, so the data plate has to win before you connect a cylinder. At £289.99 and 8.5 kg it is the top pick here for a 10 L/min outdoor hose shower. It is the wrong machine if you need a bathroom, or if you opened the listing because that specification field said natural gas.
Pros
- Strongest independent review sample in the set: 4.4 from 519
- 10 L/min and 20 kW, with a rain cap
- Supplied regulator fitted a Calor propane bottle in reviews
- Drain plug described as easy to use
Cons
- Specification field says Natural Gas while the bullets say propane
- Wind blow-out, and a short shower hose that leaks
- Flame-sensor shutoff and one internal leak in the sample
- Highest price in the set at £289.99
Best for: Outdoor camping, an RV, or horse washing when you want 10 L/min and you will check the data plate before you connect a cylinder.
Less suitable: Mains natural gas, bathrooms, and buyers who will treat the specification field as the fuel.
Specifications
- Model
- Camplux BW264BC 10 L gas water heater with rain cover
- Brand
- CAMPLUX
- Price
- ∼£290
- Customer rating
- 4.4/5(519)
- Fuel
- Propane, spec clash
- Place
- Outdoor
- Flow
- 10 L/min
- Heat output
- 20 kW
- Pump
- No
- Flue
- None
- Rain cover
- Yes
- Ignition
- 2 D batteries
- Weight
- 8.5 kg
- Energy class
- A+
Common questions
Is the BW264BC a natural gas heater?
The specification field says Natural Gas. The bullets supply a 37 mbar propane regulator and say butane needs a different regulator. Those two parts of the listing conflict. Trust the data plate.
Can it start on low water pressure?
The bullets say it starts from 0.25 bar and is aimed at camping, RVs, and horse washing. The style line says outdoor installation. A pump is not included.
Our view
The Camplux BW158BC is listed at 6 litres a minute and 12 kW, with rain cap RC354 and a 37 mbar propane regulator, for £219.99. The star line on this amazon.co.uk listing is 4.4 from 518 reviews. The written review texts captured for this listing are the same texts as the BW264BC listing, so they cannot be read as a separate sample for this model. The power-source line says liquid propane or butane, while the regulator in the box is the propane 27 mm clip-on, and butane would need a different regulator. A 20-minute safety shutoff, flame failure, and overheat protection are named, and ignition is two D batteries that are not clearly included. Until the captured reviews are actually about the BW158BC, the matching 6 L/min and 12 kW figures and the rain cap are the case for it. The copied praise is not evidence about this model.
Pros
- 6 L/min and 12 kW agree with each other
- Rain cap RC354 listed in the box
- 37 mbar propane regulator and 150 cm hose included
- Star line of 4.4 from 518 is this listing’s own
Cons
- Written reviews match the BW264BC file
- Butane is named, but the butane regulator is not the one supplied
- D batteries are not clearly included
- £219.99 buys 6 L/min, below the 10 L/min rows
Best for: An outdoor 6 L/min heater where the rain cap matters and you judge the listing rather than the duplicated review text.
Less suitable: Buyers who want written reviews that are clearly about this model.
Specifications
- Model
- Camplux BW158BC 6 L gas water heater with rain cap
- Brand
- CAMPLUX
- Price
- ∼£220
- Customer rating
- 4.4/5(518)
- Fuel
- Propane 37 mbar
- Place
- Outdoor
- Flow
- 6 L/min
- Heat output
- 12 kW
- Pump
- No
- Flue
- None
- Rain cover
- Yes
- Ignition
- 2 D batteries
- Weight
- 5.1 kg
- Energy class
- A+
Common questions
What gas does the BW158BC use?
The power-source line says liquid propane or butane. The included regulator is described as a 37 mbar propane regulator for a 27 mm clip-on. Butane would need a different regulator.
Are the written reviews unique to this model?
The star line is 4.4 from 518 on this listing. The written review texts are the same text as the BW264BC listing, so they are not an independent sample.
Our view
The Camplux GX318NG is the indoor natural-gas listing that describes a 60/100 mm balanced flue, 12 litres a minute, and 24 kW, at £179.99. The bullets state natural gas at 20 mbar, which is a figure printed on the listing and not a UK commissioning result. Amazon.co.uk shows 4.2 from 129 reviews, but the 46 written texts include other Camplux propane models, so praise and fault rates are not cleanly this GX318NG. Comments that do describe a fixed install mention a quiet holiday let, a professionally installed 1-bed chalet used for kitchen hot water, and a cottage install that was straightforward once the steps were followed. Leaks and returns also appear in that mixed block. The box lists the heater, an installation kit, and a manual. A flue kit is not included, and a 36 V fan is named alongside a 3 V field. It is the indoor candidate only where a Gas Safe engineer accepts the flue and the gas pressure.
Pros
- 12 L/min and 24 kW with a 60/100 mm balanced flue named
- £179.99 for the only room-sealed-style listing in the set
- Two outlets claimed
- Holiday-let and chalet comments describe fast heat where the install matched
Cons
- Review texts mix in other Camplux models
- Flue kit not listed as included
- 20 mbar is printed, not a UK commissioning result
- Leak comments appear in the mixed review block
Best for: A mains-gas kitchen or other room where a Gas Safe engineer specifies a 60/100 mm balanced flue.
Less suitable: Camping, a bathroom you fit yourself, and a caravan. The listing does not confirm a caravan install.
Specifications
- Model
- Camplux Climatech 4 GX318NG natural gas water heater
- Brand
- CAMPLUX
- Price
- ∼£180
- Customer rating
- 4.2/5(129)
- Fuel
- Natural gas
- Place
- Indoor
- Flow
- 12 L/min
- Heat output
- 24 kW
- Pump
- No
- Flue
- 60/100 mm flue
- Rain cover
- No
- Ignition
- 3 V listed
- Weight
- 10 kg
- Energy class
- A
Common questions
What flue does the GX318NG use?
The bullets describe a balanced flue, 60/100 mm, for coaxial or twin-pipe setups, and natural gas at a stated 20 mbar. That 20 mbar figure is printed on the listing. It is not a UK commissioning result.
Is the flue kit in the box?
Included components are the heater, an installation kit, and a manual. A flue kit is not listed.
Our view
The Gasland BE158BP60 pairs a stated 6 litres a minute with a 12 V pump, at £183.99, and it has the largest review count in this comparison: 4.1 from 798 amazon.co.uk reviews. Reviewers describe a quick mount on a van door, an outdoor shower beside a hot tub, and about 18 months in a campervan when the heater was drained each winter. One camper reported water well above 40 °C. Against that, an included pump did not run and the buyer planned to return the unit, and another review says the heat kept climbing after it was turned down, which is a scald risk. The heat-output field prints 37 kW while the bullets say 6 L/min, and the pressure fields print both 30 mbar and 30,000 mbar, so those numbers are not one duty. It is described for light drizzle, and winter storage means removing the drain plug and keeping it warm and dry. The review count is a weak reason to prefer it over a listing whose flow and kilowatts agree.
Pros
- 12 V pump included for a weak water supply
- 798 reviews, the largest count in this comparison
- Van and outdoor shower use described over many months
- 2-year warranty on the listing
Cons
- Included pump reported dead on at least one unit
- Temperature can keep rising after you turn it down
- 37 kW and 6 L/min are both printed and do not agree
- Pressure fields of 30 mbar and 30,000 mbar conflict
Best for: An outdoor or campervan shower where the supply is too weak for a tap-only heater, if you test the pump on day one.
Less suitable: Buyers who need a single trustworthy kilowatt figure, and any indoor room.
Specifications
- Model
- Gasland BE158BP60 6 L gas water heater with 12 V pump
- Brand
- GASLAND
- Price
- ∼£184
- Customer rating
- 4.1/5(798)
- Fuel
- Propane
- Place
- Outdoor
- Flow
- 6 L/min
- Pump
- Yes
- Flue
- None
- Rain cover
- No
- Ignition
- 2 D batteries
- Weight
- 4.7 kg
- Energy class
- A+
Common questions
Is a water pump included?
Yes. The included-components line lists a 6 L 12 V water pump, along with a regulator, hose, and shower head.
Why do the heat figures disagree?
The bullets say 6 L/min. The heat-output field says 37 kW. Both numbers are printed on the listing and they do not describe one obvious duty.
Our view
The Camplux AY132B is a 4.54 kg outdoor propane heater listed at 5 litres a minute and 10 kW, with hot water claimed within about 8 seconds of the shower head opening. On amazon.co.uk it sits at 4.1 from 201 reviews, and the uses that repeat are a horse hot wash and a temporary garden shower from an outside tap during a bathroom refit. The box includes a 37 mbar propane regulator, a 150 cm gas hose, and an on/off shower head, which is a fuller camping kit than the cheaper Gearpass rows. Two D batteries are not included, butane is not stated, and the style line is outdoor installation. Reviews include a flimsy plastic screw connector that failed on a first test, a heater that worked and then failed after storage, and at least one regulator the buyer had to change. At £150.44 it is the best value in this set when a 5 L/min outdoor rinse is enough. It is a poor fit for a long winter shower or a bathroom.
Pros
- 37 mbar propane regulator, hose, and shower head in the box
- 4.54 kg with a folding handle
- Starts from 0.25 bar, so a garden tap is the intended supply
- 4.1 from 201 reviews describing horse and garden use
Cons
- 5 L/min and 10 kW limit a long or winter shower
- Plastic hose connector and post-storage failures in reviews
- D batteries not included
- Butane is not stated for the supplied regulator
Best for: Outdoor horse, dog, or garden showers from a tap, when a lighter kit around £150 is enough.
Less suitable: Indoor bathrooms, cold-weather butane, and anyone who needs about 10 L/min.
Specifications
- Model
- Camplux AY132B 5 L portable gas water heater
- Brand
- CAMPLUX
- Price
- ∼£150
- Customer rating
- 4.1/5(201)
- Fuel
- Propane 37 mbar
- Place
- Outdoor
- Flow
- 5 L/min
- Heat output
- 10 kW
- Pump
- No
- Flue
- None
- Rain cover
- No
- Ignition
- 2 D batteries
- Weight
- 4.54 kg
- Energy class
- A+
Common questions
Does the AY132B include a shower?
The listing includes an on/off shower head with a 150 cm hose, plus a 37 mbar propane regulator and hose. It is described for outdoor use.
Does it need mains electricity?
The listing says ignition is by two D batteries, which are not included, and that no mains supply is required for that ignition.
Our view
The Gasland G10 Pro is listed at 10 litres a minute and 20 kW, with a pump, for £199.99, and amazon.co.uk shows 4.0 from 328 reviews. The bullets name 37 mbar propane and 28–30 mbar butane, which matches the two UK cylinder pressures, and the style line says outdoor installation with light drizzle only. Camping reviews describe hot showers as a reason to stay on the pitch, and they say the control and pump can run from a rechargeable battery or 12 V while the gas does the heating. The same sample includes a unit that would not ignite with gas pressure, water pressure, and new batteries all in place. River, creek, or lake water stayed too cold to shower because the inlet was well below room temperature, so a pump does not warm a freezing source. It weighs 11.9 kg, the part-number field says only Update, and a full hose kit is not itemised even though the components field includes a pump. Choose it when an outdoor 10 L/min heater has to draw from a weak supply.
Pros
- 10 L/min and 20 kW with a pump at £199.99
- Propane at 37 mbar and butane at 28–30 mbar both named
- 328 reviews describing camping showers
- 2-year warranty on the listing
Cons
- Very cold inlet water may never reach shower temperature
- At least one unit would not ignite
- 11.9 kg, and the hose kit is not itemised
- Size fields on the listing disagree
Best for: Camping, a barn, or a pitch where you need about 10 L/min outdoors and the tap pressure is weak.
Less suitable: Indoor bathrooms, and showers fed from a very cold stream with no way to temper the inlet.
Specifications
- Model
- Gasland G10 Pro 10 L portable LPG water heater
- Brand
- GASLAND
- Price
- ∼£200
- Customer rating
- 4.0/5(328)
- Fuel
- Propane or butane
- Place
- Outdoor
- Flow
- 10 L/min
- Heat output
- 20 kW
- Pump
- Yes
- Flue
- None
- Rain cover
- No
- Ignition
- 2 D batteries
- Weight
- 11.9 kg
- Energy class
- A
Common questions
Does the G10 Pro include a pump?
The included-components field says Pump. The bullets also describe a folding handle and battery ignition with two D cells not included.
Which cylinder pressure is it built for?
The bullets say 37 mbar propane and 28–30 mbar butane. The style line says outdoor installation, and prolonged rain is to be avoided.
Our view
The Camplux BD300NG is listed at 11 litres a minute and 22 kW on natural gas, for £189.99, with 4.0 from 20 amazon.co.uk reviews. The title mentions a bathroom, while the bullets say install it on a balcony or in a kitchen and duct a 108 mm exhaust outside, up to 3 metres. That outlet is not described as a room-sealed flue. In England, Wales, and Scotland a bathroom or shower room needs a room-sealed appliance. Ignition is two D batteries, which are not included, and the listing says 230 V mains are not required. Twelve review texts, several not in English, praise plentiful hot water and a comfortable shower temperature. One reviewer says a specialist advised against indoor installation, called the material poor, and returned the unit on arrival. The flue pipe is required and is not in the box, so the bathroom line in the title is not a buying reason.
Pros
- 11 L/min and 22 kW are stated together
- Natural gas is consistent on the power-source line
- Fixings and gaskets are listed in the box
- Energy class A is printed
Cons
- Title says bathroom; bullets say balcony or kitchen
- 108 mm exhaust is not described as room-sealed
- 4.0 from only 20 reviews, including a fitter who refused an indoor install
- Flue pipe and D batteries are not included
Best for: A balcony or kitchen natural-gas point only after a Gas Safe engineer accepts the 108 mm flue route.
Less suitable: Bathrooms, shower rooms, and camping.
Specifications
- Model
- Camplux BD300NG 11 L/min natural gas water heater
- Brand
- CAMPLUX
- Price
- ∼£190
- Customer rating
- 4.0/5(20)
- Fuel
- Natural gas
- Place
- Balcony or kitchen
- Flow
- 11 L/min
- Heat output
- 22 kW
- Pump
- No
- Flue
- 108 mm exhaust
- Rain cover
- No
- Ignition
- 2 D batteries
- Weight
- 10.2 kg
- Energy class
- A
Common questions
Can the BD300NG go in a bathroom?
The title mentions a bathroom. The bullets say install it on a balcony or in a kitchen and duct a 108 mm exhaust outside, up to 3 metres. That is not described as a room-sealed flue. In England, Wales, and Scotland a bathroom needs a room-sealed appliance.
Does it need 230 V mains?
The listing says two D batteries and that 230 V mains are not required. The batteries are not included.
Our view
The Gearpass JSQ32 is listed at £159.99 with 6.3 GPM and 160,000 BTU in the title, and amazon.co.uk shows 3.5 from 15 reviews. The title says indoor, while the bullets require ventilation and a 2.36 inch horizontal vent pipe, which is not a room-sealed balanced flue. A voltage field says 220 V even though the listing marks the heater as not electric, and the power source is liquid propane only. In 11 review texts, one person ran it as a garden shower hut from March and said it started reliably, and another got steady heat only after replacing the supplied propane regulator. Other reviews report a single day of use and then a failure the buyer could not return, weak heat, and a fitter in Germany who would not approve the appliance. Fifteen reviews, mixed across the UK, the US, and Germany, are too small a sample to treat 3.5 as a settled result. Leave it off a bathroom wall, a rental, and any plan to replace a mains-gas heater.
Pros
- Propane-only is stated on the power-source line
- LED temperature display is named
- One garden-hut report said it started reliably outdoors
- G 1/2 inch water and gas connections are named
Cons
- 3.5 from 15 reviews, with early failure and weak heat
- Supplied regulator did not work until it was changed
- Indoor title, while the vent described is not room-sealed
- 220 V is printed on a unit marked not electric
Best for: A supervised outdoor trial only, after you replace the regulator and ignore the indoor title.
Less suitable: Bathrooms, rental homes, and a fixed mains-gas installation.
Specifications
- Model
- Gearpass JSQ32 propane tankless water heater
- Brand
- GEARPASS
- Price
- ∼£160
- Customer rating
- 3.5/5(15)
- Fuel
- Propane only
- Place
- Indoor, needs vent
- Pump
- No
- Flue
- 60 mm vent
- Rain cover
- No
- Weight
- 10.8 kg
Common questions
Is the JSQ32 for indoor use?
The title says indoor. The bullets say homes and RVs are possible if ventilation and exhaust are fitted, and they name a 2.36 inch horizontal vent pipe. That is not a stated room-sealed flue.
What fuel is it?
The power-source line says liquid propane only. Is Electric is No, while a voltage field says 220 volts. Those two lines do not describe one ignition supply.
Our view
The Gearpass outdoor heater is the lowest price in this set at £74.13, with 3.4 from 19 amazon.co.uk reviews. The title quotes 4.74 GPM and 80,000 BTU, while a capacity field says 18 litres, so the page does not settle whether you are buying a tankless flow or a stored volume. A review says the pressure reducer does not fit European gas bottles, and the listing never names a 27 mm clip-on or 37 mbar. Other comments in the 11-text sample say the water stays warm rather than hot, the digital panel stays off with new propane and new batteries, or the unit smells of gas. One German review calls the quality acceptable for the money, which does not answer the UK cylinder fit. The model field says without handle, and the two D batteries are not included. The shelf price is real. A working Calor shower is not what this review sample describes.
Pros
- Lowest price in the set at £74.13
- Outdoor propane use is what the title claims
- Shower head named in the bullets
- Overheat, dry-fire, and flame-failure protection are claimed
Cons
- 3.4 from only 19 reviews
- Regulator reported not to fit European bottles, and 37 mbar is not named
- Title flow and an 18 litre capacity field conflict
- No ignition, weak heat, and a gas smell appear in the short sample
Best for: A buyer who already owns a confirmed UK propane regulator and will test ignition outdoors before a trip.
Less suitable: Anyone expecting a Calor-ready shower from the box, and any indoor or tent use.
Specifications
- Model
- Gearpass portable propane tankless water heater
- Brand
- GEARPASS
- Price
- ∼£74
- Customer rating
- 3.4/5(19)
- Fuel
- Propane
- Place
- Outdoor
- Pump
- No
- Flue
- None
- Rain cover
- No
- Ignition
- 2 D batteries
- Weight
- 6.98 kg
Common questions
Is this a storage tank?
The title says tankless and quotes 4.74 GPM. The capacity field says 18 litres. The listing does not explain that clash, so the flow and heat cells are left blank here.
Does the regulator fit UK bottles?
A captured review says the pressure reducer does not fit European gas bottles. The listing does not name a 27 mm clip-on or a 37 mbar figure.
How we compared
Scores compare the nine amazon.co.uk listings kept for this category, priced on 15 October 2026. There is no laboratory test. Review points use the written samples captured with those listings, not a fresh reading of every comment. The highest composite score is the top pick. The highest price-against-duty score is the best value. They are different listings. The five weights below sum to 100.
1
Review evidence
30%Star points and review-count points come from the amazon.co.uk lines. Written reviews that copy another ASIN keep the star points plus a small fixed addition, and do not earn the count points. A sample that mixes other models loses points. Fewer than 30 reviews cannot score above 12 on this block.
2
Stated UK job
25%A listing starts full marks when fuel, place, and the flow and kilowatt pair agree. Points come off for a 5 L/min shower limit, a fuel or pressure clash, a heat figure that disagrees with flow, a flue that is not room-sealed, or a 20 mbar line that is not a UK commissioning result.
3
Review sentiment
20%Repeated praise in the captured review sample, minus recurring faults named there, such as a pump that did not run, a short leaking hose, or early failure.
4
Price against duty
15%What the listing includes for the GBP price in this snapshot. This block is the price-performance score. The highest score here is the best value, which is not the same listing as the top pick.
5
Listing confidence
10%Points come off for internal conflicts, a missing hose or flue the job needs, and review text that is not about that model.
Independent review
Last updated: 17.10.2026
8 sources checked
Gas water heater buying guide
Decide the place and the fuel before you read the star rating. Lighting, the leak check, and draining an outdoor unit are in [how to use a gas water heater](/hub/hot-water/gas-water-heater/sub/gas-water-heater-how-to-use). Indoor flued models stop at a Gas Safe engineer. This page does not give a DIY sequence for house gas pipework.
What is a gas water heater?
A gas water heater here is an instantaneous burner. It is not an electric cylinder and it is not a combi boiler. On amazon.co.uk the nine listings kept for this page are mostly portable outdoor LPG showers for gardens, campsites, stables, and vans, plus a few indoor natural-gas heaters with a flue. Prices, stars, and review counts are the amazon.co.uk figures from 15 October 2026. There was no lab test. Place comes first.
Best for
- Garden and stable users who can drain an outdoor propane unit
- Campers who keep the burner in free air and add a pump if pressure is weak
- A mains-gas room where a Gas Safe engineer specifies a room-sealed flue
Not ideal for
- A bathroom, tent, awning, or bedroom with a portable cylinder heater
- Anyone who treats one Amazon fuel field as the data plate
- A long winter shower from a 5 L/min outdoor unit
Mistakes to avoid
- 1
Buying an outdoor unit because the title says shower
A portable LPG shower is not a room-sealed bathroom appliance. In England, Wales, and Scotland, regulation 30 requires a room-sealed appliance in a bathroom or shower room. The BD300NG title mentions a bathroom. The bullets say balcony or kitchen and a 108 mm exhaust.
- 2
Mixing regulators or trusting one fuel field
Propane is 37 mbar. Butane is 28–30 mbar and fades in the cold. UK mains gas is about 21 mbar nominal. The BW264BC specification field says Natural Gas while the bullets say propane. The Gearpass outdoor listing does not name 37 mbar, and a review says the reducer does not fit European bottles.
- 3
Reading CE or ErP class A as approval
CE, an ErP class A mark, and battery ignition are not Gas Safe registration. A battery spark does not replace a flue. Call a Gas Safe engineer for a fixed install, a flue, a fuel conversion, a smell of gas, or a landlord-supplied appliance.
What to weigh up
Place and fuel
HighOutdoor free air, or a fixed indoor flue, is the first split. A portable cylinder heater does not belong in a bathroom, a tent, an awning, or a bedroom. In England, Wales, and Scotland a bathroom or shower room needs a room-sealed appliance. The GX318NG is the listing that names a 60/100 mm balanced flue. The BD300NG’s 108 mm exhaust is not described as room-sealed, and the bullets say balcony or kitchen even though the title mentions a bathroom.
Flow, pressure, and frost
HighRead litres per minute at a stated rise, not the star rating. Figures of 5, 6, 10, or 12 L/min in this set are usually at about 25 °C. A plumbing rule of thumb is kilowatts roughly equal to litres per second times 4.19 times the rise in °C. About 24 kW is roughly 10 L/min on a 35 °C winter rise. The AY132B at 5 L/min and 10 kW is a short shower. The BW264BC and the G10 Pro state 10 L/min and 20 kW together. The BW158BC states 6 L/min and 12 kW together.
Which option suits you?
Three typical situations, each with a recommendation from this comparison.
Camping in free air
The burner stays in free air, not in a tent or an awning. If the pitch or the van supply is weak, the G10 Pro adds a pump at 10 L/min and names both UK LPG pressures. Very cold inlet water may still stay too cool to shower.
Mains-gas home
A fixed indoor heater needs a room-sealed flue and a Gas Safe engineer. The GX318NG is the listing that names a 60/100 mm balanced flue and natural gas. A portable LPG shower is the wrong machine for a bathroom.
Common questions about gas water heaters
Which gas water heater is the top pick in this set?
The top pick is the Camplux BW264BC at about £289.99. It is listed at 10 L/min and 20 kW for outdoor use, and amazon.co.uk shows 4.4 from 519 reviews, the strongest independent outdoor sample here. The specification field says Natural Gas while the bullets supply a 37 mbar propane regulator, so the data plate has to win before you connect a cylinder. It is the wrong machine for a bathroom. There was no lab test.
Which gas water heater is the best value?
The best value is the Camplux AY132B at about £150.44. It has the highest price-against-duty score in this set: a 37 mbar propane regulator, a 150 cm hose, and a shower head, with 4.1 from 201 reviews. The listing is 5 L/min and 10 kW, which is a short outdoor rinse, not a long winter shower. Two D batteries are not included. It is outdoor only.
How much does a gas water heater cost on amazon.co.uk?
In this 15 October 2026 snapshot, entry is about £74–£160, covering both Gearpass listings and the AY132B. Mid is about £180–£220, covering the pumped Gasland units, both indoor Camplux models, and the BW158BC. The top of this set is the BW264BC at £289.99. These bands are this Amazon snapshot, not a market census. Shelf prices move.
Can you use a portable gas water heater in a bathroom or a tent?
No. In England, Wales, and Scotland, regulation 30 of the Gas Safety (Installation and Use) Regulations 1998 requires a room-sealed appliance in a bathroom or shower room. A portable cylinder heater is not that appliance. nidirect warns that carbon monoxide from non-fixed fuel burners builds up in tents and awnings. A carbon monoxide alarm does not shut the gas off. A battery spark does not replace a flue.
Should you buy propane, butane, or natural gas?
Match the regulator to the gas. Propane regulators are 37 mbar. Butane regulators are 28–30 mbar, and butane fades in the cold. UK mains gas is about 21 mbar nominal. The BW264BC specification field says Natural Gas while the bullets say propane at 37 mbar. Trust the data plate, not one Amazon fuel field. A fixed mains-gas install is work for a Gas Safe engineer.
Do you need a Gas Safe engineer?
Paid domestic gas-fitting work needs a Gas Safe engineer. Call one for a fixed install, a flue, a fuel conversion, a smell of gas, or a landlord-supplied appliance. The 1998 portable-cylinder exception is not permission to use a water heater indoors. Check the engineer’s card. The public line is 0800 408 5500. Gas Safe technical bulletin 105 covers Great Britain, Northern Ireland, the Isle of Man, and Guernsey.
When is a gas boiler the closer match?
These nine listings are instantaneous burners: portable outdoor LPG showers, or a small indoor heater with a flue. They are not a combi that also heats the radiators. If the job is whole-house heating and hot water from mains gas, start with the gas boiler comparison instead. A portable cylinder heater still does not belong in a bathroom, a tent, or an awning.
Our verdict
The top pick for a 10 L/min outdoor hose shower is the Camplux BW264BC at about £289.99. It scores 76. The 4.4 from 519 reviews is the strongest independent outdoor sample, and 10 L/min agrees with 20 kW. The specification field still says Natural Gas, so the data plate has to win before you connect a cylinder. The best value is the Camplux AY132B at about £150.44. It has the highest price-against-duty score, 14, for a complete 5 L/min propane kit with 4.1 from 201 reviews. That flow is a short shower. The Gasland G10 Pro also scores 75, with a pump and both UK LPG pressures at about £199.99, and its value score is 13, so it does not take the best-value badge.
Best overallView offer
Camplux BW264BC 10 L gas water heater with rain cover
Highest composite score: 10 L/min agrees with 20 kW, and 4.4 from 519 reviews is the strongest independent outdoor sample.
Best value
View offer
Camplux AY132B 5 L portable gas water heater
Highest price-against-duty score for a complete 5 L/min propane kit at about £150.44, with 4.1 from 201 reviews.
Editorial
Editor
DIY & toolsamazon.co.uk listingsPublic UK sources
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.
Updated: 17.10.2026
8 sources checked
Guides to gas water heaters
Guides on what to look for, how to use a product, and common mistakes.
Gas water heater buying guideOutdoor LPG or indoor natural gas, then flow and pressure.Best gas water heaterWho the outdoor top pick and the indoor candidate are for, and who should skip each.How to use a gas water heaterRegulator, batteries, leak check, lighting, and draining an outdoor unit.LPG or natural gas37 mbar propane, 28–30 mbar butane, and about 21 mbar mains gas.Camping showerPitch, van, and horse wash, including tent and awning carbon monoxide.
Related comparisons
Sources
Public UK sources and the amazon.co.uk listings used for this comparison, last checked on 15 October 2026.
- Gas Safety (Installation and Use) Regulations 1998 (retrieved 15.10.2026)
- HSE: Gas safety in the home, FAQs (retrieved 15.10.2026)
- HSE: Gas safety for landlords (retrieved 15.10.2026)
- HSE: Check a gas engineer (retrieved 15.10.2026)
- Smoke and Carbon Monoxide Alarm (England) Regulations 2015, regulation 4 (retrieved 15.10.2026)
- GOV.UK: Gas types and supply pressures in the UK (retrieved 15.10.2026)
- Liquid Gas UK, Consumer Guidance Sheet 39 (retrieved 15.10.2026)
- nidirect: Carbon monoxide dangers if camping, caravanning or boating (retrieved 15.10.2026)
This page contains affiliate links to amazon.co.uk. If you buy through them, we may earn a commission at no extra cost to you. Prices, stars, and review counts are the UK listing lines. We did not run a lab test.