What to look for in geothermal equipment, including heat pumps, loop pumps, loop fluids and piping.
The circulating loop pump in a geothermal system should provide a flow of fluid through the loop adequate enough to maintain good heat transfer during both cooling and heating modes.
Water-to-air and water-to-water heat pumps are available in a number of capacities and configurations.
Options for loop fluids include water, glycols and alcohols.
Polyethylene is the most common piping material used in geothermal heat exchangers.