Plumbing help

[rickdavis]

I'm building a new house with an owb and am installing radiant floor heat, a heat exchanger in the duct work and plate heat exchanger for hot water. I have 3 zones for the floor heat, each has multiple loops. I think I need to run the incoming hot line thru the hot water plate first, then the plenum heat exchanger then the radiant heat next since it runs the coolest. I think I can run them in series or do I need to do parallel? I'm having a hard time deciding where to put all the pumps, valves, mixing valves etc. The house is 2000 sq ft down and 1000 up with a 1200 sq ft garage that has the infloor heat. 4 people using hot water. Any suggestions where to look for a complete diagram or a company I can pay to draw one up? I ordered an Acme wood boiler. I know, not liked by most, but theyre somewhat local and some friends have em and like em. Was going to go woodmaster but no one would return a call or email about local dealers in my area. Thanks in advance

 

[maple1]

A whole system from scratch is a lot to cover in a forum thread, especially one with that many different things going on.

A decent dealer should be able to provide guidance - have you asked the one you bought from? That would be my first ask. Or your friends? Eyes-on local input should be helpful.

Not knowing the heat load on each of your emitters (do you know that?), I might run the plenum exchanger first. Typically the highest load. And in-floor last, yes, and it should likely be pressurized and have a heat exchanger & mixing setup. A primary-secondary setup might be the way to go overall.

Hope you have good underground piping? Size & type?

 

[Bad LP]

Your HVAC contractor should be heavily involved in this design phase. It's not something you want to get wrong.

 

[rickdavis]

I don’t know why I hadn’t thought about asking my hvac guy. I have a meeting with him in the morning anyways