First I'd like to say since joining in February, I've increased my brain power tenfold. Kudos to you and Erin.
I have never really done properr hydronic installations I guess. The company I learned from, everything got a 007. What book of yours would you recommend where I can learn about GPM needed and feet of head to size a zone circ, and with those zones, how to size a primary pump for said system.
I dont do installations anymore, service only, but I plan to replace my own system in the spring.