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.
Do attic fans work in florida.
Some experience 30 lower cooling costs by using an attic fan.
Best ventilation is open soffit venting to a open vented ridge vent.
This was observed on numerous days following the installation.
This air is then exhausted through the fan to the outside.
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.
After attic fan installation ac still off during day.
Find out whether it is economical to run an attic fan.
During workdays would leave air conditioner off when leaving in the morning.
A whole house fan is usually installed on the attic floor near the center of your house.
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.
The attic fan kept my house cooler by 8f compared to pre fan installation days.
Temp 92 f at 5pm.
Cooler outdoor air enters through open windows lowering the indoor temperature.
Temp 84f at 5pm.
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.
One of the leading causes for fires.
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.
In the late evening or early morning the fan is turned on to exhaust hot air from the house.
Do not use mechanical means electric attic fans.
Ideally this will lower the high temperatures that have built up in your attic.
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.
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.
How an attic fan works.
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.
Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic.
Attic fans exhaust hot air from your attic to the outside.
More than 50 of the attic fans i see do not work and have current still live to the motor.
Ridge vent must me installed per the manufactures instructions.
