Recommendations for loop sizing and piping guidelines

Installation cost and efficiency

These residential closed-loop ground source heat pump (a.k.a geothermal or groundcoupled heat pumps) design guidelines were developed in conjunction with a project sponsored by the Tennessee Valley Authority in conjunction with a TVA Ground Source Heat Pumps promotion. Previous guidelines were verified and adjusted according to data gathered during this effort and previous similar projects.

A set of recommendations for loop sizing, piping guidelines, piping arrangements, and antifreeze precautions is provided. They attempt to balance the conflicting constraints of installation cost and efficiency.

These guidelines have recently been extended to regions beyond the TVA service territory.