Retrofittting

clammy

i would do a 2 pipe for the rads and do a primary secondary pumping for sure if you read up n the munkin you'll see i t needs constant flow through it,s heat exchanger other wise the unit will short cycle goodluck

Bob Larson_2

I'm installing a Munchkin with Vision 1 built-in controls in my 1920 craftsman with (tight) crawl space, indirect WH, and I'm using combination baseboard/steel panels. What's the best piping system to use? One pipe? Two pipe? Manifolds?

It seems like to go primary/secondary, I'll need another circulator and a whole extra set of controls. I'm thinking I only need one zone, since the radiators will have control valves on them.