The Sunster A2422 diesel heater is a 12V and 24V air heater with a built-in 6L fuel tank. A 110-240V transformer comes in the box, so you can plug it into a 240V socket. It suits vans, campers, trucks, cabins, tents, garages and narrowboat cabins.
What makes it different? The A2422 wireless switch has a CO alarm. If it picks up unsafe levels it sounds an alarm and shuts the heater down. You can also control the heater from the Sunster app over Wi-Fi, from the remote switch or from the LCD on the heater.
It uses 0.1L to 0.35L of diesel per hour. The heater has thermostatic control, a timer, Ventilation Mode and Turbo Heat Mode. It adjusts combustion automatically up to 5500 metres.
CO alarm remote switch - The A2422 wireless switch sounds an alarm and shuts the heater down if it detects unsafe carbon monoxide levels. Why does this matter? Diesel heaters in small spaces like vans and tents carry a CO risk. The switch also changes modes, adjusts settings and shows the heater status.
Wi-Fi app control - The Sunster app works anywhere in the country as long as the heater is connected to your WLAN. You can switch it on before you arrive. One reviewer heating a 32m2 garage needed a Wi-Fi extender to keep the connection steady. Check your signal where you plan to park.
12V, 24V and 240V power - The heater runs on 12V and 24V DC. A 110-240V AC transformer is included. So can it run from a mains socket? Yes. You can plug it straight into a 240V outlet at home or on a campsite. One reviewer ran theirs from a power bank.
Silent fuel pump - Traditional diesel heaters have an irritating tick from the fuel pump. This one does not. The air duct outlet is the main noise source at 35 dB. That is about the level of normal conversation. It makes sleeping in a van, cabin or tent easier.
Altitude adaptation - The heater adjusts combustion on its own up to 5500 metres. Thinner air at height normally hurts burn quality and fuel economy. This keeps heat output and fuel use steady on mountain trips or at alpine worksites. Most UK users will never reach that height but it shows the build quality.
Low fuel use and safety cut-out - Fuel use is 0.1L to 0.35L an hour. One reviewer used 20 litres over seven nights at 7 hours each. That works out at roughly 2.9L a night. Overheating protection triggers at 270°C. A ceramic ignition plug turns fuel to gas for quick ignition and full burn.
The box holds the diesel heater with its built-in LCD screen and the A2422 remote switch. You also get an AC power supply (the 110-240V transformer) and a set of installation accessories. The model code is WIFI-TB10PRO.
The package measures 47.1 x 41.1 x 38.7 cm and weighs 9.94kg. The listing doesn't give a full breakdown of the installation accessories. Check the parts list before you plan the install. Some buyers also look at separate exhaust pipes and air ducting. Those are sold by other sellers.
Yes. The heater runs on 12V or 24V DC. That covers most vans, cars, caravans and lorries. The included transformer takes 110-240V AC. This means you can plug it straight into a 240-volt outlet.
This helps in a garage or a cabin where there is no vehicle battery. One reviewer used it to heat a 32 square metre garage and said the set-up was easy.
The A2422 wireless switch has a built-in carbon monoxide alarm. If it detects unsafe levels it sounds an alarm and shuts the heater down automatically. Carbon monoxide has no smell or colour. A small sleeping space like a van or tent is a risky place to miss it.
The same switch also does the everyday jobs. It turns the heater on and off and changes the operating mode. It adjusts settings and shows the heater's working status. The heater also has overheating protection at 270°C.
The loudest part is the air duct outlet at 35 dB. That is about the level of a normal conversation. Many diesel heaters have a fuel pump that ticks all night. This one uses an upgraded silent fuel pump with no ticking sound.
The makers also added a fixed bracket and a better-balanced fan impeller. This keeps the fan turning more steadily and cuts noise. A garage owner who bought it said it was quiet even at full speed. Another reviewer simply called it "excellent and quiet".
Fuel use is 0.1 to 0.35 litres per hour. The built-in tank holds 6 litres. At the highest setting that gives roughly 17 hours of running. At the lowest setting it is closer to 60 hours.
Real use will vary with the temperature and the size of the space. One reviewer used about 20 litres over a week of cold nights in France. They ran it for 7 hours each night to keep a bivouac warm. A narrowboat owner found it gave plenty of heat but could be thirsty on diesel. Another reviewer said it burned very little fuel.
Yes. Thinner air at height can upset combustion in some diesel heaters. This one adjusts its combustion automatically up to 5500 metres. The listing says this keeps heat output and fuel economy up in the mountains.
That suits mountain camping and alpine worksites. One reviewer used it while storm camping with family in Snowdonia National Park and said they stayed warm.
There are three ways to control it. You can use the LCD on the heater or the A2422 wireless switch. You can also use the Sunster app. The app works over Wi-Fi, so you can manage the heater from anywhere as long as it is connected to WLAN.
The modes are thermostatic control, a timing function, ventilation mode and turbo heat mode. One reviewer found the app very easy to use. Another needed a Wi-Fi extender to keep the connection reliable in their garage. If your heater sits far from your router, plan for that.
The heater has 4.0 out of 5 stars from 21 ratings. Of those, 67% are 5 star and 19% are 1 star. Reviewers describe it as well built and good at what it claims. One reviewer said it failed after 6 weeks. Another got a "check ignition" error while camping and the unit would not fire up.
The heater uses a ceramic ignition plug, which is a common wear part. A reviewer with several diesel heaters said it is very easy to service and that they always carry a spare plug. Their tips were to let the heater cool down fully after it switches off. They also run it on max power for a few minutes before shutting it down. This burns off carbon. Sunster products carry CE, WEE, FCC, EAC and UKCA certification. Amazon also gives a 30-day right of return on many products.
| Brand | Sunster |
| Manufacturer | Sunster |
| Model | WIFI-TB10PRO |
| Manufacturer part number | WIFI-TB10PRO |
| Variant | TB10PRO WIFI Version (with A2422) |
| Fuel type | Diesel |
| DC voltage | 12V and 24V |
| AC supply | 110-240V via included transformer |
| Mains plug-in | Can be plugged directly into a 240-volt outlet |
| Fuel tank capacity | 6L (built in) |
| Fuel consumption | 0.1L - 0.35L per hour |
| Ignition | Ceramic ignition plug with volatile technology |
| Fuel pump | Silent fuel pump with no ticking |
| Noise level | 35 dB at the air duct outlet |
| Maximum altitude | 5500 metres |
| Altitude adaptation | Automatic combustion adjustment |
| Operating modes | Thermostatic control, timing function, Ventilation Mode, Turbo Heat Mode |
| Overheating protection | 270°C or above |
| Control methods | Sunster app over Wi-Fi, A2422 wireless remote switch, LCD on heater |
| Carbon monoxide alarm | In A2422 switch with automatic shutdown |
| Wiring | Two wiring methods |
| Cable | Extendable |
| Suitable for | RVs, trucks, camper vans, cabins, tents, garages, narrowboat cabins |
| Certifications | CE, WEE, FCC, EAC, UKCA |
| Package dimensions | 47.1 x 41.1 x 38.7 cm |
| Weight | 9.94kg |
| Included | Diesel heater with LCD, A2422 remote switch, AC power supply, installation accessories |
| Date first available | 28 September 2025 |
