Anyone have any experience with the Lanair waste oil heaters? Guy selling them says just have to clean the cleanable screen once in a while (no spin on filters, just screen in canister), clean the buildup in the heat exchanger a couple times (mid heating season and at the end of the season) and says they are not much trouble at all. Is he giving me the used care salesman pitch, or are these heaters really not much of a hassle?

Prices seem reasonable enough compared to at least one other brand I priced from a dealer.

John