8KW Diesel Heater

How big a space can the HBS-3 heat?

HCALORY rates it for spaces of 20 to 25 m². That covers a van, a caravan, a boat cabin or a single garage. How fast does it get going? The listing says you feel warmth after 3 minutes and the outlet reaches 100°C within 5 minutes. The upgraded aluminium heat exchanger gives an 18% boost in combustion efficiency.

Buyers back this up for small spaces. One keeps a garage at 18°C when it is 3°C outside. Another heats an 8.5 m motorhome with no trouble. Larger spaces are harder. One buyer has a well insulated workshop of about 6 m x 6 m. They say it is only just enough there. Is it really 8 kW? The same buyer doubts it. They compare the body size and pump speed with 5 kW units. That is one opinion. The listing still states 8 kW adjustable output. This 8KW diesel heater suits smaller spaces best.

How much fuel does it use and how long does the tank last?

Fuel use runs from 0.11 to 0.35 L/h depending on the power setting. The tank holds 5 L. So what does that mean in hours? At the lowest setting a full tank gives roughly 45 hours. At the highest it gives roughly 14 hours.

Real use sits in between. One buyer ran it on setting 3 and got about 20 hours from 4 L. Another heated parts of a stone house with 2 L over 12 to 18 hours. A third said fuel lasted only about 2 days in their use. Your result depends on insulation and outside temperature. The auto start-stop mode also helps. The fuel pump stays on standby and only works when the room drops below your set temperature.

What power supply does it need?

It runs on 12 V or 24 V DC for vehicles and on 220 to 240 V AC through the supplied adapter. That means you can use it in a van on the road and then plug it in at home or on a campsite. You do not need to buy a separate mains converter.

Does 24 V work? Feedback is mixed. One buyer found it did not run on 24 V even after switching the setting in the hidden menu. They fitted a voltage reducer to get it going. If you have a 24 V truck system check this first. A 12 V battery needs to be in good health too. Low voltage is a common reason for failed starts on any diesel air heater.

Will it start in freezing weather?

Yes. The listing says it starts in temperatures as low as -20°C. The glow plug preheats for 1 minute before ignition. It keeps running for another 30 seconds afterwards to hold a stable flame.

Starting can still take patience. The pump needs fuel in the line first. One buyer struggled to fire it up until they used the app. Another says you may need to repeat the priming process if you use it regularly. Expect a ticking sound from the pump. Buyers describe the unit as fairly quiet once it is running. One says the pump is a bit noisy. Another fitted an intake silencer and a larger exhaust to cut the noise. If noise matters to you HCALORY also sells silent pump versions.

How do you control it?

There are three ways. You can use the Bluetooth app on your phone. You can use the LCD control panel. Or you can use the wireless remote. The remote works up to 30 m away. The app works up to 10 m. The panel can sit inside the vehicle or room on the included 1.5 m extension cable.

What can you change? There are 10 heat settings. The app adds a multi-group timer and thermostat control. It also has plateau mode and a fan mode. Fan mode blows cool air in summer. You can switch the language and the units. One buyer runs fan speed control to keep noise down. Then they swap to temperature control once warm. Check that the remote has a battery. One buyer had to buy one.

Does it work at high altitude?

Thin air upsets the fuel and air balance in a diesel heater. This model has five altitude settings at 1,000 m / 2,000 m / 3,000 m / 4,000 m and 5,000 m. The control system adjusts the air-fuel mixture for each. Why does that matter? A wrong mixture causes incomplete burning and smoke. The altitude mode is there to prevent both.

The product description mentions a dual mode at 2,500 m and 5,000 m. It also quotes 16,400 ft. That equals 5,000 m. The bullet points and the specification list five steps. Check the manual or app when you set it up. Most UK users stay below 1,000 m anyway.

Is it safe to use indoors or in a vehicle?

The heater carries short circuit and reverse polarity protection. It also has over-voltage protection and overheat protection at 270°C or above. The listing says it can be used in cars and RVs. It can also be used on boats and indoors. The key rule is that exhaust gases must be vented outdoors. Carbon monoxide can poison you. Fit a carbon monoxide detector. One buyer did exactly that.

Buyers raise a few real concerns. One said the supplied fuel line was not suitable for diesel. It perished after 2 months and caused a small leak. Another suggests buying a harder fuel line before you start. Two reviews mention thick smoke on early runs. One reports a cracked heat exchanger. These cases are a minority. The rating is 4.3 out of 5 from 216 ratings. 69% gave five stars and 7% gave one star. Inspect the unit on arrival and check all lines and joints.

What is in the box and what else might you need?

The box holds the heater and the LCD switch. It also has the remote control and the exhaust pipe. You get a wiring harness and an AC power adapter. The package measures 50 x 48 x 20 cm and weighs 10.5kg. The model number is HBS-3.

What might you add? Buyers mention several items. A better fuel line is the most common. Some also bought extra vent hose and a jerry can. Others bought a battery charger and an outdoor box. A wall hole cutter helps for a house install. Some wires come at odd lengths. One buyer shortened them with proper connectors. Instructions get mixed comments. Some buyers found the user interface unclear. Plan the install before you start. This 8KW diesel heater is easy to set up for most buyers who have basic tools.