Manual Liquid fuel Heaters
Manual heaters are an efficient, clean combustion air heaters are the perfect solution for using waste oil or diesel (and other fuels) for heating in a simple and reliable and not in a capital intensive way. These heaters operate with the use of most engine oils; mineral or synthetic oils and gear or hydraulic fluids.
If you are looking for the best combination of simplicity, safety and minimal investment to get heat from the fuels mentioned, you should start your search here: