This 5kW diesel air heater from LF Bros is a self-contained unit with the heater, 5L fuel tank and controls built into one body. It measures 38.1 x 24.5 x 29.5 cm and weighs 11.5kg. A foldable handle makes it easy to carry.
Heat output runs from 4,700 to 17,000 BTU (1,400 to 5,000 W). Fuel use is just 0.18 to 0.53 L/h. It covers roughly 20 to 25 m², depending on insulation and outside temperature.
It runs on 12V, 24V or 220-240V using the included transformer. An LCD controller and a pre-paired remote work from up to 30 m away. Overheat protection is built in. It costs £205.98 against an RRP of £279.98.
Heat output and coverage - The heater gives 4,700 to 17,000 BTU, which is 1,400 to 5,000 W of thermal power. What does that mean in practice? In LF Bros' test conditions it lifted a tent from 0°C to 20°C in about 8 minutes. It suits spaces of roughly 20 to 25 m², though insulation and outdoor temperature change that. It works in temperatures from -40°C to 40°C.
Fuel economy and tank size - Fuel use sits between 0.18 and 0.53 L/h. The 5L tank can run for up to about 27 hours on a low setting. Why does that matter? You refuel less often, which helps on overnight stays. One customer reports it lasting 4 to 5 days on low heat while fishing. Actual run time depends on power setting and conditions.
Three power options - It works from 12V and 24V supplies and has a transformer for 220-240V UK sockets. So can you use it in a van and a garage? Yes. A reviewer confirms both a 12 volt lead and a mains lead come in the box. Another says it runs on a Bluetti power station. The 12V rating is 15 amps.
Remote control and LCD display - A pre-paired remote works from up to 30 m away. You can start the heater before you reach the vehicle so it is warm when you get in. The LCD controller shows settings clearly. Reviewers call the screen easy to read. Note that this N2 model has no timer or thermostat.
All-in-one portable design - The heater, tank and key parts sit in one unit. Fewer separate parts means fewer assembly steps. Instructions, a printed manual, QR-code guidance and an assembly video come with it. A reviewer says every bracket you need is included. The foldable handle helps with moving and storing it and the whole unit weighs 11.5kg.
Fuel cap and safety - An internally threaded fuel cap seals the tank to cut spills in transit. Overheat protection is built in. What about exhaust? The outlet must go outdoors, away from windows and air intakes, with the muffler horizontal and its small hole facing down. Exhaust contains combustion gases. Do not use it in enclosed sleeping areas. Fit a carbon monoxide alarm.
Output runs from 4,700 to 17,000 BTU. That is 1,400 to 5,000 W of thermal power. LF Bros rates it for spaces of about 20 to 25 m². Insulation and outside temperature change that figure a lot.
In the maker's test it took a tent from 0°C to 20°C in about 8 minutes. Real use will vary. A well-insulated garage will warm faster than a draughty shed. One reviewer says it keeps a 3-bedroom house at 22°C. Another uses it in an outdoor workshop. A third heats a garage through winter.
The tank holds 5 L. The heater burns 0.18 to 0.53 L/h. On the lowest setting that works out at roughly 27 hours. On the highest it is closer to 9 hours. The listing gives 9 to 27 operating hours.
So what does that mean for overnight use? A full tank on a low setting covers several nights of 8 hour use. One reviewer who fishes says it lasts 4 to 5 days on low heat in a bivvy. That will depend on how often it runs each day.
It runs on 12V or 24V direct current. It also comes with a 220 to 240V transformer for a standard UK socket. Listed current draw is 15 amps. Reviewers say a 12V lead and a mains lead are both in the box.
Can you run it off a portable power station? One reviewer says it works on Bluetti Elite power stations. Another says a lead-acid style battery setup would not hold charge past 30 minutes and had to stay plugged in. Check your battery capacity before you rely on it off-grid.
It is an all-in-one unit. The heater and fuel tank sit in one body. That means fewer separate parts to fit than a split heater. The pack includes assembly parts and brackets. You also get a printed manual and QR-code guidance. LF Bros supplies an assembly video as well.
Reviewers call it simple to set up. One says every bracket needed was included. One says the supplied hose is short and bought a longer exhaust pipe. The exhaust must go outdoors. Fit the muffler horizontally with the small hole facing down. Keep it away from windows and air intakes.
The exhaust carries combustion gases. That is why the manufacturer says to route it outside and not to use the heater in enclosed sleeping areas. It has overheat protection. Fit a carbon monoxide alarm in any space where you sleep.
This matters. One reviewer reported holes in the supplied exhaust pipe. Their carbon monoxide alarm went off on the first night. Another reviewer found a leaking fuel cap. Not every buyer has these problems. Inspect the exhaust and fuel cap before first use. The fuel cap has an internal thread meant to seal the tank during transport.
Reviews are split. Of 10 mentions of noise, 4 are positive and 6 are negative. Some owners call it quiet or low in noise. One says the pump is quite noisy and suggests soundproofing it or fitting it outside. Another calls it extremely noisy.
LF Bros says upgraded internal parts cut noise. The N2 has a standard oil pump. The N2pro and N3 have a silent pump. If noise bothers you in a small van then those models are worth a look.
No. The N2 has no timer and no thermostat. You control it with the LCD controller or the pre-paired remote. The remote works from up to 30 m away. That lets you start it before you get into a van or out to the garage. The temperature setting range is 10°C to 35°C.
Want a timer? The N4 and N2E have one. The N2pro and N3 have both a timer and a thermostat. The N4 has a smaller 3.5 L tank. The N2 and N4 take 24V. The N2E, N2pro and N3 list 12V and 230V only.
The unit measures 38.1 cm deep by 24.5 cm wide by 29.5 cm high. It weighs 11.5kg. A foldable handle helps you carry it. One owner found it too big for the back of a Land Rover and used it in a garage instead.
It works in air temperatures from -40°C to 40°C. The N2 is rated to an altitude of 1,500 m. The N2E, N2pro and N3 are rated to 5,200 m. It is white and floor mounted. It comes with a 1 year manufacturer warranty. Customer rating is 4.2 out of 5 from 172 ratings. 69% gave five stars and 10% gave one star.
| Specification | Detail |
|---|---|
| Brand | LF Bros |
| Model | N2 |
| Colour | White |
| Form factor | Portable all-in-one |
| Power source | Diesel |
| Fuel type | Diesel |
| Heating method | Convection |
| Heat output | 4,700 to 17,000 BTU |
| Thermal power | 1,400 to 5,000 W |
| Fuel consumption | 0.18 to 0.53 L/h |
| Fuel tank capacity | 5 L |
| Maximum run time per tank | Up to about 27 hours |
| Supported voltage | 12 V / 24 V / 220 to 240 V (transformer included) |
| Current | 15 A |
| Temperature setting range | 10°C to 35°C |
| Operating temperature range | -40°C to 40°C |
| Altitude rating | 1,500 m |
| Heating coverage | About 20 to 25 m² |
| Mounting type | Floor mount |
| Controller | LCD display with pre-paired remote |
| Remote control range | Up to 30 m |
| Glow plug | Standard |
| Oil pump | Standard |
| Timer function | No |
| Thermostat | No |
| Safety features | Overheat protection |
| Dimensions (D x W x H) | 38.1 x 24.5 x 29.5 cm |
| Weight | 11.5kg |
| Included components | Machine body, remote control, assembly parts, instructions |
| Country of origin | China |
| Manufacturer warranty | 1 year |
