Diesel heaters are suitable for large marquees and produce no naked flame. Diesel heaters are discretely hidden outside the marquee and connected via a pipe that transfers hot air safely into the marquee. As the name suggests they are powered by diesel fuel so have sufficient power, keeping the marquee warm when external temperatures are extremely low.
Blow heaters are suitable for small marquees and produce a naked flame. Blow heaters are visible in marquees. Instead these heaters are powered by gas compressed in a canister (We supply the gas cylinders). Unlike diesel heaters, multiple blow heaters will be required to produce the adequate amount of heat required to keep larger marquees warm when external temperatures are very low.