Reply #31: The house was built in 1986 [View All]

[DancingBear]

Radiant heat was in its infancy back then, and the house has 22(!) zones for heat.

Nowadays, folks have figured out how to do multiple returns, so of course that many aren't needed, but it is quite something to look at. The piping is all copper, and the diameter of some of the pipes is 1". First thing the plumbers say is "what are you going to do with all that copper' - a couple even offered to barter out their servixes in return for the pipes.

It turns out, though, that we should be able to re-use a lot of it, even if we only have three zones, which is the plan.