Warm Roof Cavity Exhaust

The Roof Cavity Exhausting includes a switching assembly and allows the system to exhaust the warm air through the heat exchange unit and recover the heat within the roof cavity when its available. This heat is only available during the daytime when the sun is shining when heat within the home is minimal. This option is worthwhile particularly in homes that have a dark coloured steel roof where the heat gain can be significant even in winter. Obviously the benefits will be greater in some parts of New Zealand than others. At night this heat source is not available and the exhaust air can be switched back to be sourced only from within the warmer parts of the home.