I use an Venor all in one diesel heater. This season was the first time I used it to heat an 8 man tent. I got a longer pipe for the heat output so I had a little distance from the tent to the unit. The exhaust pipe gets hot so I didn’t want it close to the tent. It got us roasting on a late November mule deer hunt when the temps were at 5-10 degrees. It was on the lowest fuel pump cycle and it was great. Fuel pump does make a bit of noise but for me it was well worth the noise. In the future, I am going to use it for a wall tent to see if it can heat the 10x14 wall tent. After my experience this fall I am optimistic it will be enough BTUs to keep it comfortable at night. I also replaced the fuel lines with higher quality lines and added a fuel filter based on what I read online.
The unit itself has the digital controller with remote, tank, fuel pump, and heating unit. Everything you need minus the power and fuel to get it going. I think a crafty guy could make a much higher self contained unit with a pelican case or a metal case. The benefit of a DIY unit in my opinion would be a more weather proof unit. I have not used mine in a snow storm where it would be exposed to the elements. Based in the digital display, I’m a bit hesitant to leave it out without any type of extra cover to keep the moisture off it. The power consumption is low voltage. I had an extra RV size battery sitting around that I used and if worked great. If you were to used it for a long time a solar charger and an extra gas can could keep you running for a long time.
From my experience, it has been a great unit at the price point. Watch some YouTube videos and you can see quite a few people using it for overland rigs.
Feel free to send over any specific questions you have and I can try to answer.
Here is the one I use:
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