Use our free Geothermal Heat Pump Sizing Calculator to accurately estimate the ideal capacity (in tons) and approximate ground loop length for your property. Input your conditioned area, insulation level, and climate zone to get tailored estimates for your geothermal HVAC system, ensuring maximum energy efficiency and comfort year-round.
Formula:
The calculator estimates peak heating and cooling loads, then converts these into the recommended heat pump capacity (in tons) and approximates the necessary ground loop length. The core simplified formulas are:
- Peak Heating/Cooling Load (BTUh) = Conditioned Area (sq ft) × Dynamic Load Factor (BTUh/sq ft)
- Heat Pump Capacity (Tons) = Dominant Peak Load (BTUh) / 12,000 BTUh/Ton
- Estimated Loop Length (feet) = Heat Pump Capacity (Tons) × Dynamic Loop Factor (feet/ton)
Where Dynamic Load Factor and Dynamic Loop Factor are adjusted based on your specific selections for building characteristics, climate, and ground conditions.