HCALORY 12V Portable Diesel Heater, 2024 upgrade Toolbox 2 Diesel Air Heater 8KW All-in-One Parking Heater, 6L Fuel Tank with APP Control Work at Altitude Max 20000 ft for Car Trucks RV and camper

I’ve had an interesting experience with this portable diesel heater, but overall, I’m really impressed with it. My first unit worked great for about 6–7 hours before the pump stopped working. I was using some very old, possibly contaminated diesel, so that might have been the issue. When I tried to return it, I learned it’s non-returnable due to the fuel content. However, Amazon was kind enough to give me a voucher for about 80% of the value, and I decided to order a second unit.Since I already knew the pump was the problem and didn’t want to uninstall everything, I swapped the pump from the new unit to the old one. That solved the issue! The heater has been working flawlessly for about five days now. The swap took me about 1.5 hours since I was figuring things out as I went, but it was surprisingly easy to service. I also contacted the manufacturer, who promised to send a replacement pump. It’s been about 10 days, and I’m still waiting—likely due to shipping from China during the holiday rush. In the meantime, I now have a full set of spare parts from the second unit, so it worked out well!Performance and Features:This heater puts out a ton of heat and is perfect for my needs. I’m using it to warm up a 1,000 sq. ft. space in sub-freezing temperatures, and it keeps the area warm enough to comfortably wear just a shirt. It uses about 1 gallon of diesel per day, which feels very efficient.One of the standout features is the altitude sensor, which adjusts the fuel-to-air ratio based on air pressure. This ensures the cleanest and most efficient burn possible. It’s even sensitive enough to account for normal changes in barometric pressure, which I find impressive.I also measured the exhaust gases, and at max power, the temperature was around 70°C, meaning minimal heat is lost through the combustion exhaust. Very efficient!Setup Tips:I mounted my unit indoors, but the included exhaust pipe was too short, so I had to buy a longer one. You’ll also want an adapter to ensure that the hot exhaust pipe doesn’t touch your walls, as it can get up to 220°C with the included short pipe (but much cooler with a longer one like mine). If noise is an issue, you can mount it outside and pipe the heated air inside, though that setup might require larger holes in your walls and a way to protect the heater from the rain.User Experience:The Bluetooth functionality is fantastic! I can monitor and control the heater from a few rooms away, which is incredibly convenient. It’s a feature I wouldn’t skip.One minor inconvenience is that you can’t easily see how much fuel is left without opening the unit. To fix this, I cut a small opening in the plastic lid to check the tank at a glance—problem solved in 15 minutes. The unit is generally easy to operate and service.There were no leaks, except for one time when I overfilled the tank while it was running. Even then, the risk of fire is minimal since it’s diesel. I haven’t noticed any smell of fumes or fuel indoors. The outside combustion exhaust may have a slight odor during the initial start-up, but once it’s running, the combustion is so efficient that there’s almost no visible exhaust and there's zero smell.Pros and Cons:I love that you can set a specific temperature and let the heater adjust its power or even turn off altogether, all automatically based on room temp. Alternatively, you can manually set a fixed power level. The heater also comes with cables to connect to a 12V battery, though I’ve been running it from a wall outlet with no issues, using the included power adapter.My only complaint is the noise. If you’re using it in a living space, you might want to consider mounting it outside, though that comes with trade-offs in efficiency and bigger holes in your wall.Final Thoughts:Overall, this is a fantastic heater, and I wouldn’t hesitate to buy it again. It’s powerful, efficient, and loaded with useful features. For a workspace or emergency heating, it’s perfect for indoor use as long as you vent the exhaust gases properly. Highly recommended!

This is my first diesel heater and did plenty of research before deciding to buy. So far I am very pleased with my choice. This comes at the very affordable end of the diesel heaters and I am very pleased with the build quality and function for the price. It was quick and easy to get set up and fired right up on the first try with no issues. My biggest worry was being able to run this off an Ecoflow powerbank and it works great. I was concerned that like many heaters, the glow plug would draw too much current for the Ecoflow's 12V output, but that has not been the case. My River 3 has been easily able to power this on the 12V circuit so that I do not need to worry about using the inverter to use the included 120V to 12V adapter, but I am glad it was included. The function, build quality, ease of use on this unit makes it completely worth the purchase price. I would call it a great value.

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I was looking for a heater for camping but also one to run in my garage to warm it up enough to work. I live in the north east and when the garage thermometer said 42 degrees, I tried running this on high for about an hour and got it to 53 degrees. I made a simple exhaust port to exit a piece of wood that I put in the window to prevent any fumes from coming in the garage.It works almost too well for my tent so just be aware to run it at a lower temperature and it will be perfect. I also recommend you buy a O2 sensor if you’re using it in a closed space like a rooftop tent like I am. It’s peace of mind more than anything.

I love this heater, I bought two of them and they work really well,, get one before the price goes up or China starts charging more because of tariffs.