The solar fan does have its downsides.
Solar conduit on roof vs in attoc.
A solar fan is able to actively pull more air into your attic than a turbine can.
They also create zones of negative pressure that could pull the ac cooled air into the attic.
When sunlight is blocked for whatever reason the fan comes to a halt immediately.
The fan blades spin but they don t lower the attic temperature at all.
This is a solar panel supplying free electricity to the attic fan under the silver dome on the rear roof.
It will only function when direct sunlight falls on the panel.
Conduit runs are hidden under the panels and inside attics not run over the top of the roof.
When there s sunlight the fan runs on solar and when there s not it switches to ac power so you get daily cooling regardless best roof mounted.
Other factors also affect the operation of the solar fan.
That means tough luck if your attic is still hot when the sun goes down.
These new england clean energy installations are neat tidy and attractive evenly spaced panels the arrays fit the roofs well and not an inch of conduit in sight.
A solar fan doesn t rely on the wind and it actually has a more powerful motor in it so it keeps the temperature of your attic regulated regardless of wind conditions.
The safety and effectiveness of an attic fan is a subject that is hotly debated but line powered products usually cost more to operate than they can produce in savings during the summer.