Low cfm similar to a bathroom vent 300cfm and only in the hot spots basically by adding an inline ducting fan to the return ducts for the hotspot rooms.
Attic too hot for ac unit.
In many instances an attic fan can be helpful in improving air circulation.
Install electric ventilators and attic fans which remove hot air from an attic.
Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape.
As for attic air conditioners you have two best options without a window.
When things heat up you re more inclined to run the air conditioner longer than you should.
A portable air conditioner is the easiest solution for cooling your attic.
I live on long island ny.
The total square footage is about 500.
A hot attic is bad for several reasons.
I installed 3 large windows.
They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees.
Signs that the attic is too hot the attic should have a uniform flow of air circulating from the outside through the attic to exhaust the rest of the house.
Do i need additional roof ridge vents.
We are in the process of converting the attic to living space.
Hot summer weather poses the opposite problem for maintaining recommended attic temperatures.
Excessive heat deteriorates items you store in the attic and can cause moisture.
You can pipe the hot air out through a chimney.
My idea is to vent the build up of hot air that has risen to the ceiling in the hotspot rooms into the attic so that air from cooler parts of the house can move in.
As the ac.
Mini split ductless air conditioner.
An ac unit will keep the temperature much more pleasant and comfortable for you to be in your attic for long periods of time.
Another problem with vaulted ceilings at least here in the southeast is that builders use tradeoffs to put in less insulation than is required for flat ceilings.
Never try to vent a portable ac unit through a functional working chimney or fireplace that s a huge safety risk.
However it absolutely must be an unused chimney in an unused fireplace.
Ideal attic temperatures shouldn t be more than 10 to 20 degrees hotter than outside temperatures.
I plan on adding a ductless heat ac unit.
When the air conditioner ran it sucked lots of hot attic air right into the room and the ceiling near those lights got to temperatures well above 100 f.