I've seen some that most definitely were not, usually along with a bunch of other high-efficiency tech. To be fair, I've seen minimum systems also, so it can b

I've seen some that most definitely were not, usually along with a bunch of other high-efficiency tech. To be fair, I've seen minimum systems also, so it can be done. My general take on home design is simple-passive-accessible. Someone in the future will thank you. It's worth poking around manufacturer's websites. http://www.pexheat.com/Catalog/Controls http://www.pexheat.com/Catalog/Controls and consider the lifespan of a house vs. the lifespan of the subsystems. My general take is that the more built-in and difficult to modify it is, the madder someone will be in 50 years. In the interest of full disclosure, I'm no fan of radiant heating systems having seen the issues of parts availability, latency, the tearing up of floors for repair,and a strong preference for point sources of heat (gas stoves for example), so it might show through in the comment.