greetings to those who know more than me & are willing to share it;

i would like to put together a small geothermal heat (only) pump using a condenser unit such as used at a supermarket for food. the complete unit, except for the txv, ***** to water exchanger & circ pump, would be totally enclosed in the discharge of my whole house air filtration system (approx 200-300 cfm). the small fan would be removed. available well water is 57f, though would like capabilty of +/- 10f. prefer 3000-4000 btu (already have two ton geo heat pump). any suggestions?

thanks much;
eddc