ratdoggy
Well-known member
I looked into Geo Thermal when building my house $30k upfront I passed on that....Luckily I have NG at my house with a $65 per month budget plan for heating,cooking clothes drier and a fireplace in a 2500 sq ft house
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School Me on Geothermal
- Thread starter cdd1
- Start date
I looked into Geo Thermal when building my house $30k upfront I passed on that....Luckily I have NG at my house with a $65 per month budget plan for heating,cooking clothes drier and a fireplace in a 2500 sq ft house
sms1974
Well-known member
Do you know how I know you live in a cold climate?
Are you implying that a heat pump making heat doesn't work as hard as it does in cooling???
pseudorealityx
Well-known member
Are you implying that a heat pump making heat doesn't work as hard as it does in cooling???
"Good" air to air heat pump in cooling = ~20 SEER
"Good" air to air heat pump in heating = ~2.4 COP at 17 degrees
"Good" geothermal heat pump in cooling = ~30 EER
"Good" geothermal heat pump in heating = ~4.5 COP with 50 degree water
What I'm saying is that... depending on your utility cost, standard air to air heat pumps can compete against natural gas on cost. Geothermal heats ~2x as efficiently as a "good" air to air heat pump, and typically doesn't require axillary heat like an air to air unit does because it never has to go into defrost mode, and it's overall capacity never falls off that much from nominal.**
And that's just talking the heating side... not the fact that you're cooling side is now 50% more efficient than a standard air to air condensing unit.
** - obviously dependent on climate and a host of other things. But you would do better to use a small gas fired boiler on your geothermal loop to add heat to the water loop than to burn it directly into the air.
sms1974
Well-known member
"Good" air to air heat pump in cooling = ~20 SEER
"Good" air to air heat pump in heating = ~2.4 COP at 17 degrees
"Good" geothermal heat pump in cooling = ~30 EER
"Good" geothermal heat pump in heating = ~4.5 COP with 50 degree water
What I'm saying is that... depending on your utility cost, standard air to air heat pumps can compete against natural gas on cost. Geothermal heats ~2x as efficiently as a "good" air to air heat pump, and typically doesn't require axillary heat like an air to air unit does because it never has to go into defrost mode, and it's overall capacity never falls off that much from nominal.**
And that's just talking the heating side... not the fact that you're cooling side is now 50% more efficient than a standard air to air condensing unit.
** - obviously dependent on climate and a host of other things. But you would do better to use a small gas fired boiler on your geothermal loop to add heat to the water loop than to burn it directly into the air.
While I won't dispute the majority of your statements, I'm curious as to your comment about you knowing that I live in a northern climate??
I'll also say that the efficency comparisons I've run and had the local electric and gas companies run for my area a 96% gas furnace beats geo for operating costs. Yes the geo comes out well ahead for air conditioning but our heating hours v/s cooling hours in northern ohio make heating costs a deciding factor...
theoldwizard1
Well-known member
WOW ! I find that hard to believe !!I'll also say that the efficency comparisons I've run and had the local electric and gas companies run for my area a 96% gas furnace beats geo for operating costs.
sms1974
Well-known member
WOW ! I find that hard to believe !!
It all depends on what your paying for gas and electric in your area... Around here gas is extreamly cheap and electric cost are going up up up...