It removes the heat that creates the need for big air conditioning systems. If bedrooms and the roof space above are filled with breezes of cool night air, they should never need to be air conditioned. A white ceiling shutter, whose blades pivot open and closed automatically, is fitted over the ceiling opening immediately below. There are three types of ceiling shutter. A 250W single phase, variable speed motor belt drives the fan blades.
Exhaust vents in the under eave, gable end or if there are no eaves or gables, on the roof itself.
Existing wind turbines can form part of the exhaust system so money spent on them is not wasted. The system is usually located in a hallway or some other walk-through area. There is only one fan of appropriate size and one ceiling shutter needed to cool the whole home. The shutter blades close up when the fan is off. Back to top Expels Roof Space Heat.