I sure hope not, because I just started using my home-built tank-n-Tarm system. But, the real question involves storage strategy. The liner supposedly shouldn't be regularly heated beyond 170F, yet that is precisely the temperature at which my plumber claims my baseboards really do their thing well. Wouldn't we want to heat a bit beyond ideal and cool down not much below it? For example, last night I elected to not stoke anymore wood because my tank had reached precisely 170. When I woke up this morning, it was down to 140. I wasn't confident that 140 would be enough to keep my house warm all day, so I had another fire this morning, and the evidence indicates that that was probably a good decision. I guess I'm wondering what temperature regimes are typical for effective heating of a typical house in a cold climate.