The ground source heat pump used at 21 Acres farm helped to earn them a LEED Platinum certification. A geothermal system is the most efficient and healthy way to heat a building, with minimal environmental impact and long lasting performance. The heating/cooling system uses 1/4th the amount of energy as a conventional system, and when coupled with radiant floor heating, delivers an even dispersion of heat across the floor, making it suitable for buildings with high ceilings.