How effective are roof ventilation fans in moving the ambient temperature throughout the roofspace? Not very effective at all. What is the purpose of moving the ambient temperature throughout the roofspace?
WELL THIS IS THE ANSWER TO ROOF VENTILATION – TO BE ABLE TO TAKE THE OVERLOAD OF BUILT UP HEATED AIR FROM THE ROOFSPACE
To further allow the inside of the home to cool in the hotter months of the year and to dry the roofspace from condensation and/or humidity moisture all year round.
SO CAN ROOF VENTILATION FANS EFFECTIVELY VENTILATE A ROOF CAVITY ENOUGH TO COOL A HOME IN THE HOTTER MONTHS OF THE YEAR AND DRY THE ROOFSPACE FROM CONDENSATION AND/OR HUMIDITY MOISTURE ALL YEAR ROUND? THE RESOUNDING ANSWER IS NO
It is physically impossible for one fan to remove the built-up heat from all areas or zones of the whole roofspace, unless of course you have multiples across a roof to take the heat from each zone or area if you like. You will need at least 3 or 4 mechanical fans for an average size home, then you will need at least 4 eaves vents to each fan then possibly you may get a reasonable amount of comfort. However this comes at great cost, each unit is hundreds of dollars then you need eaves vents. In order to effectively ventilate a roof cavity with fans of any type it is going to be an expensive exercise in the thousands of dollars. Then you have the maintenance costs and they will need replacement at some time, as well as energy costs.
WHAT ABOUT SOLAR FANS, WHEN THE SUN GOES DOWN SO DO SOLAR FANS
And in winter when they are needed most to remove damaging condensation moisture, they do not even work at all.
So what you really need for real effective ambient air flow throughout the roofspace is a product that has inlets and outlets in every zone of the roof, that has no moving parts to wear out that never needs replacement that will move the ambient air throughout the roofspace – cooling the home in summer and keep the roofspace dry from condensation and/or humidity moisture 24/7 365 days of the year. With a one off cost and a guarantee that no other ventilation system gives – you can find such products on this website The Universal Tile Ventilator System for tiled roofs and The Smoothline Ventilation System for corrugated colorbond roofs – you can’t beat that.