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Using a geothermal system for house with 275' mine attached?
Hi there, my house is attached (via the laundry room) to a 275' tunnel with a constant 55 degrees year round. I currently have a hot water boiler system installed (boiler is 8 yrs old, system/house is 58 yrs old), but my gas bills are very high during the winter ($150/mo ave plus electric). I'm intrigued by the idea of heating the 55 degree air that is available by opening the laundry room door (the house is literally attached to the mine portal, so no outside air) but don't know what the options are - geothermal, heat exchanger, or something else? Anyway, just exploring options. Thanks!