High Tech Deck Most Efficient Geothermal Heating & Cooling System From Oklahoma Saves You Money May 6, 2021 Do you want to save money on heating and cooling and help the environment? A geothermal heat pump may be the answer! Oklahoma City-based supplier of residential geothermal products ClimateMaster has announced the designation of its Trilogy 45 QE as ‘Energy Star Most Efficient 2021’. The ‘Most Efficient’ designation from Energy Star represents the leading edge in energy efficient products, and the recent award confirms ClimateMaster’s position as an innovator in the field of residential geothermal systems. Geothermal heat pumps (GHPs) take advantage of the constant temperature that exists below the surface of the earth. These ground source heat pumps are able to heat, cool, and generate hot water by transferring heat to or from the ground.