The Hcalory 2KW 12V diesel heater is a compact parking heater with a built-in 10L fuel tank. It has an aluminium body that improves heating efficiency by 18%. It heats spaces up to 25m² and reaches 50°C in 3.5 minutes.
You can control it three ways: Bluetooth app (30 metres range), a remote or the LCD panel. It has 10 temperature settings and auto start-stop. Timer and thermostatic modes are also included.
It suits vans, trucks, RVs, boats and cabins. It weighs 6.2kg and measures 33.5 x 11 x 11 cm. Fuel use is 0.11-0.35 L/H.
The listing gives a heating area of up to 25m². That suits a van, a camper, a boat cabin, a truck cab or a small log cabin. It reaches 50°C in 3.5 minutes, so the warm air starts quickly. One owner uses it in a small bungalow of about 65m² and holds 19.5°C. That is well past the stated 25m² figure, so treat it as a real-world result and not a rating. Insulation and outside temperature will change what you get.
Fuel use is 0.11 to 0.35 litres per hour. The maths is simple. A 10L tank gives about 90 hours at the lowest setting. At the highest setting it gives about 28 hours. One reviewer ran it for 8 hours each night on low heat and used less than a litre of diesel. The 18% gain in burning efficiency comes from the upgraded aluminium body. Your real usage will depend on the temperature setting you pick.
Check this before you order. The title mentions a 10L fuel tank. The box contents list does not show one. It lists the heater, an LCD digital switch, a remote control, an exhaust pipe and a harness. One reviewer said the diesel container has to sit outside and another skipped the tank completely. A third bought a separate mount and tank kit. Ask the seller to confirm what ships with your unit.
There are three ways to control it. You can use the LCD panel, the remote control or the Bluetooth app. Bluetooth range is 30 metres. The app covers temperature setting, timers with multiple groups, gear setting, altitude mode, auto start-stop and fan mode. There are 10 temperature settings and a thermostatic mode. Several reviewers said pairing took seconds. One said it would not link to their phone. Another said the manual only explains how to download the app.
Yes. It has a dual altitude mode for 2,500m and 5,000m. The listed plateau range is 1,000m to 5,000m. Thin air changes the air-to-fuel balance. The heater detects this and adjusts the ratio itself, so you do not need to set it by hand. That matters for mountain trips because a fixed ratio can cause poor burning and fault codes. The listing states output at 5,000m is similar to sea level.
The heater has protection against over-heating, short-circuit, reverse connection and over-voltage. The exhaust must run to the outdoors. This prevents carbon monoxide poisoning and is not negotiable. Two reviewers also warned that the exhaust pipe gets very hot. One melted items nearby and another burned a hole in an awning. Keep the pipe clear of fabric and plastic. Heat-resistant wrap is worth fitting. Fit a carbon monoxide alarm in the living space too.
Installation is the weakest area in the reviews. Of 16 mentions only 5 were positive. People said the printed instructions were missing or thin. Others found plenty of videos online. The upside is that the pump and control unit are already fitted inside the case. You only connect the air in and out, the exhaust and the fuel line. One reviewer took a day to wire a leisure battery and mount the heater under a van. Another found the battery ring terminals did not fit and had to alter them. Expect smoke for the first 10 minutes of the first run.
Voltage is listed as 12V/24V DC. The title says 12V. The heater measures 33.5 x 11 x 11 cm and weighs 6.2kg. That makes it easy to move between a van and a workshop. One reviewer measured battery draw at about 3% of a 100Ah battery over an 8 hour night run. The model number is HC1-U2 and the manufacturer reference is HBU-2. Amazon states a 30-day right of return on many products. One reviewer said returns were refused, so check the seller's conditions first. Note the listing text mentions an 8KW heater in one place. This unit is 2KW. Mention the Hcalory 2KW 12V diesel heater model code when you contact support.
| Brand | HCALORY |
| Model | HC1-U2 |
| Manufacturer part number | HBU-2 |
| Colour | Blue and red |
| Heater type | Diesel air heater |
| Power output | 2kW |
| Voltage | 12V/24V DC |
| Fuel tank capacity | 10 litres |
| Fuel consumption | 0.11 to 0.35 litres per hour |
| Pump | Standard quiet pump |
| Body material | Upgraded aluminium |
| Dimensions | 33.5 x 11 x 11 cm |
| Weight | 6.2kg |
| Heating area | Up to 25m² |
| Time to reach 50°C | 3.5 minutes |
| Heating efficiency improvement | 18% |
| Temperature settings | 10 |
| Plateau model range | 1,000m to 5,000m |
| Altitude mode | Dual mode (2,500m and 5,000m) with automatic air-fuel ratio adjustment |
| Control methods | Bluetooth app, remote control and LCD panel |
| Bluetooth range | 30 metres |
| Automatic start-stop | Yes |
| Timer function | Yes, with multiple timing groups |
| Thermostatic mode | Yes |
| App functions | Temperature setting, timers, gear setting, power levels, altitude mode, auto start-stop and fan mode |
| Safety protections | Over-heating, short-circuit, reverse connection and over-voltage |
| Exhaust requirement | Must be vented outdoors |
| Suitable for | Truck, van, RV, camper, boat, log cabin, SUV and vehicle or marine cabin |
| Box contents | Heater, LCD digital switch, remote control, exhaust pipe and harness |
