Using a dhc for a glycol loop
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For a glycol filled attached garage loop, Has anyone ever used a Domestic hot water coil to heat a radiator or modine? The coil in my boiler has 3/4” npt tappings. Other than that I don’t see any info on keystokers website. This would be a lot simpler than using a exchanger.
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It will have to be a pretty small modine. When the fan is running on them it takes a lot to keep up. You are going to need a small expansion tank for that loop also.
- McGiever
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*Phil* beat me typing;
Just remember that all hydronic rules still apply.
Need a expansion tank, air removal vents, PRV (pressure releif valve), make-up water and of course a circ. pump too.
All the above needs to be glycol compatable for this proposed setup also.
Just remember that all hydronic rules still apply.
Need a expansion tank, air removal vents, PRV (pressure releif valve), make-up water and of course a circ. pump too.
All the above needs to be glycol compatable for this proposed setup also.
Last edited by McGiever on Mon. Oct. 15, 2018 9:38 am, edited 1 time in total.
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- Member
- Posts: 558
- Joined: Thu. Sep. 04, 2014 10:01 am
- Location: Western NY 14141
- Stoker Coal Boiler: Keystoker KB-8
- Coal Size/Type: Buckwheat
- Other Heating: Utica Propane Hot Water
Yes i understand it will need all the components. It doesn't get me out of anything but the exchanger.
How big of a modine do you think it could handle? I know one limitation would be the 3/4" pex or copper.
How big of a modine do you think it could handle? I know one limitation would be the 3/4" pex or copper.
- McGiever
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- Posts: 10130
- Joined: Sun. May. 02, 2010 11:26 pm
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- Stoker Coal Boiler: AXEMAN-ANDERSON 130 "1959"
- Hand Fed Coal Boiler: BUCKET A DAY water heater
- Hand Fed Coal Stove: Warm Morning 414A
- Coal Size/Type: PEA,NUT,STOVE /ANTHRACITE
- Other Heating: Ground Source Heat Pump and some Solar
The math plays heavy on fluid temp and flow rate and physical size of coil (not pipe size) or HX...find all the unknowns.
If you have a modine size in mind you can work backwards with manufactuers data to find what would be required to have it perform to your needs.