Search found 4 matches

by davew26
Tue Nov 23, 2010 9:05 am
Forum: General Discussion
Topic: HVAC GeoThermal Heating and Cooling
Replies: 7
Views: 1204

Re: HVAC GeoThermal Heating and Cooling

Yes, I could use antifreeze and I do use some I dilute my water with about 5% Propylene Glycol. That lowers the freezing temperature some. My closed loop system contains about 350 gallons of water and Glycol. The heat exchanger is capable of dropping the water temp down to around ten degrees but hea...
by davew26
Mon Nov 22, 2010 9:16 pm
Forum: General Discussion
Topic: HVAC GeoThermal Heating and Cooling
Replies: 7
Views: 1204

Re: HVAC GeoThermal Heating and Cooling

what about running the system in parallel rather than series...? not possible or ? I tried running them in parallel, didn't work well. The pipe is 7 ft underground and runs back and forth in a side yard. Luckly we have a long 3 acre lot so there was plenty of room. The engineers calculated everythi...
by davew26
Mon Nov 22, 2010 5:22 pm
Forum: General Discussion
Topic: HVAC GeoThermal Heating and Cooling
Replies: 7
Views: 1204

Re: HVAC GeoThermal Heating and Cooling

Thanks for the reply. I timed the unit running periods and it is usually 3 to 10 minutes. I am afraid of leaving the secondary open. I remember how easily the audio output transformers would blow if you power up an amplifier with no speakers attached. This was on older amps but Would probably still ...
by davew26
Mon Nov 22, 2010 1:12 pm
Forum: General Discussion
Topic: HVAC GeoThermal Heating and Cooling
Replies: 7
Views: 1204

HVAC GeoThermal Heating and Cooling

I have been using a geothermal heating/cooling system for thirty years and love it. I circulate water in 2,000 feet of 2" polybutyl pipe in a closed loop system. We decided to add on to our house and have added a second geothermal unit. It is installed in series in the closed loop system. A problem ...