heat exchangers in cabins?

Working on designing my system.

My ? is, I'm going to run my house and two cabins on the same heat and storage system. The cabins or 120 feet away side by each. Each cabin is just under 400 sqft. My plan is to run underground piping heavy insulated to the cabins, from there what would one recommend for heat exchangers in the cabins. One is built already and one is going to be built in the near future. In floor? base board? There is no domestic water here just strait ambient air heating. Temps to deal with down to -40C is possible. The roof is 4 inch sprayed foamed with 8x8 timbers, 16x24 heating area, divider around a small bedroom. Is the layout. Basically open floor plan.

Byron

woodsmaster said:

I would go with radiator panels or in floor. baseboard typically has to have 170 F water for good output. rad panels operate well down to 140 maybe less if you oversize a little. In floor maybe 110 in your climate.

The lower temp water you can use the longer your storage will last. Any more advise will require 1 free stay at your cabin. Just kidding

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Anybody here on this forum is welcome anytime. Just PM me when you want a visit.

Sounds like I will put the infloor in on the new cabin during construction. The old cabin I will have monkey around abit and then somehow get the infloor in, I'll figure something out.

385 sqft. will this need only one heat zone?

Infloor sounds better as it can operate at lower temps.

THanks Byron