This air is then exhausted through the fan to the outside.
Do attic fans work in florida.
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.
This was observed on numerous days following the installation.
How solar attic fans in florida differ from full house fans.
The attic fan kept my house cooler by 8f compared to pre fan installation days.
One of the leading causes for fires.
During workdays would leave air conditioner off when leaving in the morning.
After attic fan installation ac still off during day.
Ridge vent must me installed per the manufactures instructions.
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.
Instead of installing a fan just make sure your attic is well ventilated.
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.
Depending on these things and a few other factors it is possible that your solar attic fan can save you enough on the cost of utilities to have paid for itself in as little as one or two summers of use.
Ideally this will lower the high temperatures that have built up in your attic.
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.
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.
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.
How an attic fan works.
Temp 92 f at 5pm.
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.
Cooler outdoor air enters through open windows lowering the indoor temperature.
A whole house fan is usually installed on the attic floor near the center of your house.
Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic.
Temp 84f at 5pm.
Some experience 30 lower cooling costs by using an attic fan.
Best ventilation is open soffit venting to a open vented ridge vent.
Do not use mechanical means electric attic fans.
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.
In the late evening or early morning the fan is turned on to exhaust hot air from the house.
