When it comes to adjusting the thermostat of your attic s fan it s best to adjust it to approximately 90 to 95 degrees.
Attic temp 85 in house.
The ceiling design temp should be the greatest attic temp delta t not the ambient air temps.
So my house burned down a couple of years ago.
They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees.
High temperatures inside your attic shorten the life span of shingles.
This will use more energy and make your air conditioner work harder which will increase your summer utility bill.
If your attic soars above 100 degrees and reaches the 150 mark its time to consult.
What temperature should attic fan be set at.
Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape.
Only about 10 of the hip roof is shaded so it gets plenty of direct sunlight.
The fire started on an outside wall went up the wall and into the attic space spread across the entire house in the attic with no smoke coming into the house until the ceiling was about to collapse which was far too late.
Luckily my wife and i were upstairs and hear the rafters crackling looked outside and saw the wall of fire and got our.
I m spending more money on running the dehumidifier year round than i previously was to heat the house with outside temperatures ranging between 5 f and 95 f attic temperatures range between 48 f and 92 f.
Of course some environments are much hotter than others so this will be the perfect time to measure out how warm your attic will get during the most heated of seasons.
For most homes the biggest concern is the effect of attic temperature on living space comfort.
The consensus seems to be that if you have the maximum amount of insulation in your attic floor for your area lowering the temperature of the attic by 10 or even 20 degrees will have a minimal if any impact of actual heating and cooling costs.
However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic.
The closer you can get the max attic temp swings to ambient the better but it is really hard in existing housing stock especially when the existing roofing surface is nowhere near needing replacement.
Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.