YHDD 8KW Diesel Air Heater

How much heat does the YHDD 8KW diesel heater give out and how fast does it warm a garage?

It is rated at 8KW. That is a lot of output for a unit that measures roughly 43 x 42 x 32 cm in its packaging and weighs 9.4kg. Reviewers who use it in garages say the space feels warmer within about 10 minutes. One person with a stand-alone art studio says the room heats up with the door closed in about 20 minutes on a medium to low setting. Before that, they ran a 2.5kW oil-filled radiator for 2 to 3 hours to get the same result.

How warm can you set it? The thermostat range is 5°C to 40°C. One reviewer set theirs to 22°C and another found the room sitting at 18°C when they walked in.

How long will the 5L tank last on one fill?

Fuel use is listed at 0.15 to 0.35 litres an hour. Divide 5 litres by those figures and you get roughly 14 hours on the highest setting and about 33 hours on the lowest. Real use sits in between. One reviewer measured around 200ml an hour on a medium to low setting. Another used about a quarter of the tank over four hours of work in a garage. Your figure will depend on the heat level you choose and how cold the space is.

What are the ways to control it?

There are three. You can use the display panel on the unit. You can use the 40m remote control. Or you can use the Bluetooth app on your phone. The product page also lists a timer function and auto on/off. It also shows several temperature levels.

Is the Bluetooth easy to set up? One reviewer needed two attempts to pair their phone. After that it worked fine and they changed the temperature from the end of their driveway. Another started it from the kitchen. Keep in mind that Bluetooth range is much shorter than the 40m remote range.

Can I run it from the mains as well as from a vehicle battery?

Yes. It is rated for 12V and 24V DC, so it suits cars, vans, trucks and RVs. It also comes with a 110V to 240V AC adapter. That means you can plug it into a normal wall socket in a garage or workshop. One reviewer plugged it straight into the wall. Another used a basic 240V to 12V converter for a fixed outdoor installation.

The mains adapter does not change how the heater works. It still burns diesel. So it still needs an exhaust that runs fully outside.

Is it safe to use indoors and what do I need to do about the exhaust?

A diesel air heater burns fuel and makes exhaust gas that contains carbon monoxide. The exhaust must be routed completely outdoors. The space needs proper ventilation too. A reviewer who installed one in a garage ran the exhaust down the outside wall and mounted the outlet high and out of the way. Fit a carbon monoxide alarm in any room or vehicle where you use it.

On the unit itself the tank has an inner thread cover with rubber sealing gaskets to stop fuel leaking. One reviewer says the cap seals tight and they noticed no diesel smell. Another noticed a faint smell on start-up only.

How loud is it and does it smell?

It is not silent. Reviewers describe a hum rather than a roar. One says you can hear it from the kitchen door but it is not loud. Another says it runs fairly quietly after the first few seconds of starting up. One reviewer notes fan and pump noise during use. There is a short burst of noise at start-up while the pump primes the fuel line.

Smell was minor in the reviews. Two people mention a slight smell when it starts. Nobody reports a strong diesel smell once it is running.

Does it work at high altitude?

Yes. It has automatic altitude compensation and the listing says it works reliably up to 4,500 metres. Thinner air at height changes how fuel burns. A heater without compensation can run poorly or cut out. This one adjusts for it by itself. You do not need to change a setting by hand. That helps if you camp in the Highlands or travel in mountain areas.

Is it difficult to install and what comes in the box?

Plan some time for it. The only item listed in the box is a user manual. One reviewer found the instructions very basic for a first-time installer. They got it working with help from a friend who had fitted heaters in campervans before. They also said it took a while to prime the fuel pump. Another reviewer says the setup needs careful attention to the fuel and power connections. Online videos helped them.

Two other reviewers say the connectors matched and the mounting points were sensible. Because the tank is built in, you can move the unit between a garage and a vehicle. It does not have to be a permanent fit. The model number is DP8000 and the colour is white. The listing says certain products cannot be delivered outside mainland UK. A 30-day right of return applies to many products. Check the return details for exceptions. This YHDD 8KW diesel heater page shows a 5.0 star rating from 109 ratings.