Well fellow fire starters after months of contiplation between conventional and gasifer boiler I finally desided on the next gen biomass 60 from zenon at newhorizon he gave me a hell of a deal, 5400.00 shipped. now i have to hook it up, im a doityourselfer type guy, i know somwhere in this forum it discusses controling pumps and saftey devices, i have 4 radiant heat zones and im kinda confused on how to wire the pumps in my zones when calling for heat so the pump on the boiler will come on also. i am useing a plate heat ex to seperate the boilers from the zones because of no oxy barrier pipe, the boilers will be ran parellel , what is the best way to pipe radiant floor heat. any help would be greatly appreciated thanks steve