Getting ready to buy line for my garn install wich for the first year will be a heat exchanger in the furnace and then hopefully radiant panels next year. Im going to be using rehau 1.25 pex insualted line into the house and then switch to non-insualted rehau once im into the house. I found this on a central boiler site and am wondering if this is the right way to hook up my system. http://www.centralboiler.com/Tech/C110.pdf Although im not really sure about the thermostatic valve and what its for. Does this seem like the correct way to hook up to everything? And do you guys see any problem with using pex for everything inside? I know at the garn I will have iron pipe then hook that to the insulated pex. But once im inside do you see any problems with hooking everything up with the pex?