The attic fan kept my house cooler by 8f compared to pre fan installation days.
Do attic fans work in florida.
On the other the florida solar energy center university of central florida found that attics with nominal natural ventilation and r 19 ceiling insulation do not need powered vent fans as it turns out because the insulation slows heat from moving down into the living space homes with well insulated attics don t see a significant reduction in their cooling load when they add attic ventilation fans.
If the air conditioner is working at the same time as the attic fan cool air from your living space is being wasted in your attic seeping through the attic access panel drywall and holes in the interior wall top plates where plumbing pipes and electrical wires feed into the attic.
After attic fan installation ac still off during day.
Attic fans exhaust hot air from your attic to the outside.
How an attic fan works.
Temp 92 f at 5pm.
This air is then exhausted through the fan to the outside.
This was observed on numerous days following the installation.
During workdays would leave air conditioner off when leaving in the morning.
An experimental study was carried out during the summer to investigate the natural cooling potential of use of a whole house fan in central florida s hot and humid climate.
Ideally this will lower the high temperatures that have built up in your attic.
Some experience 30 lower cooling costs by using an attic fan.
Cooler outdoor air enters through open windows lowering the indoor temperature.
Before the advent of vapor compression air conditioning the use of whole house fans was a popular means to enhancing natural ventilation to achieve greater comfort in hotread the rest.
One of the leading causes for fires.
How solar attic fans in florida differ from full house fans.
Do not use mechanical means electric attic fans.
Ridge vent must me installed per the manufactures instructions.
A whole house fan is usually installed on the attic floor near the center of your house.
In the late evening or early morning the fan is turned on to exhaust hot air from the house.
One static vent style is the turbine vent which uses wind to power its enclosed fan all it takes is a light breeze to rotate the blades and suck heat out of the attic view example on the home.
Attic fans are not recommended if you have central air conditioning because when you turn the fan on in the summer it depressurizes the attic but also reaches down into your house and starts drawing off air conditioned air effectively driving up your cooling costs.
Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic.
Instead of installing a fan just make sure your attic is well ventilated.
When the university of central florida s florida solar energy center tested homes they found that air leaking from a home s duct system can cause negative pressures within the home s interior when the air.
Temp 84f at 5pm.
Best ventilation is open soffit venting to a open vented ridge vent.
The problem with this design as argued by energy professionals is that attic fans also pull the conditioned air from your home into the attic.
