Windvent » How It Works »

The Midtherm Windvent operates purely on aerodynamic principles. It is driven by the provision of an air supply and a corresponding extraction rate and therefore needs no power to activate the unit. In fact, the only power required at all is a low voltage controller unit that drives the dampers to modulate the input of natural air.

The system operates as air flows around the terminal itself, generating positive and negative pressure areas. On the positive side air enters the louvres of the terminal and is directed down through the internal vanes into the room below. The negative pressure on the leeward side of the terminal induces air to leave the louvres and stale air from the room below will rise and be expelled from the terminal.

This process is aided by the stack effect - as cool air enters the windward side of the unit it descends into the room below and the warm stale air rises into the ducts facing the leeward side.