First off I would like to say that I have received a damaged unit upon inspection before installing so I reached out to the seller and they communicated well and sent me a replacement unit within a week. I’m very pleased with the customer service and would buy from this seller again.I installed this in my school bus/ tiny home and it works awesome to keep us warm in the cold Michigan winter. This thing will kick out some serious heat!Just YouTube how other people have installed Chinese diesel heaters so you get a visual on how it works and you’ll save yourself some time.For the bus, it’s most fuel efficient running on a low setting with another separate complementary heat source.I like the LCD controller version of this heater better than the knob style because the LCD controller has a thermostat that allows you to set a desired temperature and it will show you the current temperature and any error codes that might be causing it to shut down. Once the thermostat reaches the set temperature it will slow down the fan and fuel pump to almost nothing. The LCD controller also has advanced settings if you enter the passcode 1688 where it lets you change the pump and fan speeds which are meant for higher elevations to maximize efficiency.I’ve had 5 Chinese diesel heaters and as long as you receive a completely intact unit not damaged from transportation or manufacturing defects, the only issue I’ve run into with them is that after a while (2 years in my case) the exhaust and the inner body will become very black with soot and need to be cleaned to maintain proper combustion and exhaust. The controller would show an error E-08 code which is lack of fuel or air in fuel line and would shut down. Sometimes the fuel filter needs to be cleaned as well if it’s throwing the E-08 code.One thing to also be aware of is that in extreme cold temperatures, diesel fuel can freeze up or gel if not treated with anti gel.I can definitely recommend these heaters. They are well worth the mone
Nellie 
