I'm trolling for thoughts on final design for a Garn system. I’ve got portions of the puzzle in place and would welcome thoughts on design/control/piping approaches. Situation to date is as follows:
3 buildings in play: Garn Barn, 2-story existing house, 1-story shop with loft located up in northern WI.
1.) Garn 1500 is in place in a remote insulated structure.
2.) 150’(x 2) of 1 ½ “ PEX buried and spray foamed in a 1’ block of closed cell foam. (40% of the run is actually inside the house between the entry point and the utility room)
3.)Lower (walk out) level of pre-existing house - in process of laying sleepers and 1 ½” of rigid over most of the uninsulated slab. This will be covered with Warmboard. Isolated areas (+/- 1/3 of the level) to have low temp rads- ideally with thermostatic valves.
4.)Lower level of shop is tubed with 3x300’ ½” pex in slab (insulated below slab– 2” rigid/Perimiter slab - 4” rigid
5.) 8-2” conduits run +/- 15’ between house and shop in an insulated underground chase encased with 2” of rigid - to allow feeding heat to the shop building from the utility room in the house.
6.) Intent is to place ??? pump in Garn barn along with HX
7.) Insulated Garn barn will have aux electric baseboard if Garn is not fed.
8.)It is my intent to use glycol in all lines other than Garn primary loop - all of house and shop.
9.) Lower level House Heat load +/- 30k using 2/3 Warmboard and 1/3 low temp rads
10.)Upper level House Heat load +/- 35k up and all Warmboard
11.) Lower level Shop Heat load +/- 20k and already tubed in the slab
12.) Upper level Shop Heat load +/- 15k and low temp rads are intended.
13.) I would like to run (indirect??) Domestic HW off the Garn when it is running and ??? when it is not.
14.) I intend to include an LP fired back up boiler of the Garn is not fed.
15.) Heat loads are preliminary and will likely be a bit lower when final.
There is a ton of ways to skin this cat and your thoughts on control logic/design concepts/piping would be welcomed. I’m working with a local guy with a background in more conventional systems to pipe thing up, and am looking for approaches to suggest to him to assist in incorporation of the Garn into his design thought process.
I appreciate the input form the brain trust.
Dan
3 buildings in play: Garn Barn, 2-story existing house, 1-story shop with loft located up in northern WI.
1.) Garn 1500 is in place in a remote insulated structure.
2.) 150’(x 2) of 1 ½ “ PEX buried and spray foamed in a 1’ block of closed cell foam. (40% of the run is actually inside the house between the entry point and the utility room)
3.)Lower (walk out) level of pre-existing house - in process of laying sleepers and 1 ½” of rigid over most of the uninsulated slab. This will be covered with Warmboard. Isolated areas (+/- 1/3 of the level) to have low temp rads- ideally with thermostatic valves.
4.)Lower level of shop is tubed with 3x300’ ½” pex in slab (insulated below slab– 2” rigid/Perimiter slab - 4” rigid
5.) 8-2” conduits run +/- 15’ between house and shop in an insulated underground chase encased with 2” of rigid - to allow feeding heat to the shop building from the utility room in the house.
6.) Intent is to place ??? pump in Garn barn along with HX
7.) Insulated Garn barn will have aux electric baseboard if Garn is not fed.
8.)It is my intent to use glycol in all lines other than Garn primary loop - all of house and shop.
9.) Lower level House Heat load +/- 30k using 2/3 Warmboard and 1/3 low temp rads
10.)Upper level House Heat load +/- 35k up and all Warmboard
11.) Lower level Shop Heat load +/- 20k and already tubed in the slab
12.) Upper level Shop Heat load +/- 15k and low temp rads are intended.
13.) I would like to run (indirect??) Domestic HW off the Garn when it is running and ??? when it is not.
14.) I intend to include an LP fired back up boiler of the Garn is not fed.
15.) Heat loads are preliminary and will likely be a bit lower when final.
There is a ton of ways to skin this cat and your thoughts on control logic/design concepts/piping would be welcomed. I’m working with a local guy with a background in more conventional systems to pipe thing up, and am looking for approaches to suggest to him to assist in incorporation of the Garn into his design thought process.
I appreciate the input form the brain trust.
Dan