The best replacement for geothermal is solar.

The best alternatives to geothermal are rated as following:

★★★★★	solar
★★★★	heat pump
★	nuclear
★	oil heat
★	geoexchange
★	air heat pump
★	ground source
★	wood boiler
★	radiant heat
	ground source heat pumps
	conventional hvac
	solar energy
	radiant heating
	forced air
	wind energy
	gas furnace
	hvac
	propane heating
	solar heating
	natural gas heating
	electric heat
	oil heating
	solar panels
	radiant floor heat
	wind power
	air source heat pump
	high efficiency heat pump
	biomass
	dual fuel
	wind
	inverter heat pump
	heat pump savings
	air to air
	vrf
	solar thermal
	electric heat pump
	gas heat
	outdoor wood furnace
	acadia heat pump
	air to air heat pump
	traditional heat pump

Your alternative for geothermal is not listed? Suggest!

Speaking about geothermal, one probably shouldn't forget about radiant floor heat.

Other search terms related to geothermal and their ratings are:

★★★★★	radiant floor heat
★★★★	solar
★★	radiant heat
★	tankless water heater
	cooling tower
	water heater

You have in mind a companion for geothermal and it is not yet here? Propose!

Google Trends

Scale is based on the average worldwide traffic of geothermal in all years. Click on graph for more.

geothermal

solar

heat pump