Air recirculation in ventilation systems is essentially the mixing of a certain amount of exhaust air into the supply air. This process provides a reduction in energy consumption when heating fresh ...

Geothermal heat exchangers almost always use condenser water or glycol as the heat transfer medium — and, sometimes, refrigerant. Wastewater heat recovery systems typically preheat domestic cold water ...

Mole Valley District Council planning committee is expected to pass a bid to install new air handling units as well as an ...