Energy savings by balanced ventilation with heat recovery and ground heat exchanger.

This paper investigates quantitatively the energy conservation achieved by balanced ventilation with heat recovery and upstream ground heat exchanger. The investigations were conducted on an occupied single-family house equipped with such a balanced ventilation system. The heat recovery unit of this system consists of a plate-type heatexchanger with a downstream small air-to-air heat pump. In addition this house is equipped with a ground heat exchanger. This balanced ventilation system with heat recovery and upstream ground heat exchanger not only covers the entire ventilation heat requirement for the house, but also a part of the transmission heat requirement.