,,-sourceheatpumps(thosethatexchangeheatwithoutdoorair,asopposedtobodiesofwaterortheground)areratedwitha"heatingseasonperformancefactor"(HSPF)4EGEE102GeothermalHeatPumpsTheyusetheEarthasaheatsinkinthesummerandaheatsourceinthewinter,#sidebar5EGEE1026EGEE102GeoExchangeHeatpumpsystemMovie7EGEE102World’sLargestHeatPumpTheGaltHouseEastHotelandWaterfrontOfficeBuildingsinLouisville,Kentucky,usea4,,000-square-foot(70,000squaremeter)pletedin1984,usesa1,700-tonGHPsystem,whichcost$1,500pertontoinstall/geothermal/?getrec=3297896&display_type=verbose8EGEE102ThishouseinAurora,Colorado,usesageothermalheatpumpsystemthatwillprovidealtheheating,cooling,,500squarefeetwithagoodbuildingenvelopeandageothermalheatpump,energycostsareabout$,,ponents3-tonAddisonheatpump,15kWauxiliaryheat Closedloop CentralthermostatInstallationCosts$4,parablesystem $3,600indoorhardcosts $2,766/ton $1,800/houseincentivefromJacksonEMCOperatingCosts(airsource/watersource)Heating$307/$211 Cooling$252/$230 Waterheating$270/$136 Annualtotal$1,073/$577 -yearpaybacktorecover$2,90010EGEE102
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