I havent bought a diesel heater yet. Im looking at the Webasto the Espar and the Planar. I feel they are all pretty equal. The Planar dealer is located very close to me and is working on a system that I feel would be better for our use. So probably going to go that route. He is very interested in the build and has been working on a full hot water system for the van crowd. I am running the heated floor through a Kumma electric hot water heater that has motoraid. I will be building a system that uses, Engine heat, Electric heat (24 volt 900 watt element) and the diesel heater.