Ideal attic temperature and humidity settings.
Positive oressure ventilation reduce attic temp.
You can bring in outside air and get positive pressure in the house in one of a few ways but the main way that home builders do it around here is by using the air handler unit ahu in the heating.
Intake vents located at the lowest part of the roof under the eaves allow cool.
The interpretation of the results follow.
This pressure fluctuates based on the duty cycle of the fan coil.
Or break the performance of your heating and cooling systems and your attic ventilation.
At this point the investigation is essentially complete.
Instead the goal is to design an attic ventilation system that effectively compensates for the additional heat gain produced by the high levels of insulation.
The normal indoor humidity range in winter should be 15.
However the effect may be beneficial in the context of decompensated heart failure where the decreased preload and afterload result in a return to a more productive part of the starling curve.
That would only create problems at other times of the year.
My father is interested in removing heat from his attic to try to keep the upstairs of his house somewhat cooler.
The solution to this dilemma isn t to reduce the insulation in an attic.
Install electric ventilators and attic fans which remove hot air from an attic.
Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.
If the home doesn t have ducts there still may be reasons a homeowner would want to reduce the attic temperature.
The room is measured to have a positive air pressure with respect to the exterior that varies between 1 pa.
Based on the duty cycle of the fan coil.
They have thermostats that turn the fan on at a recommended preset temperature of 100 110 degrees.
Again i m assuming that you re not considering a sealed attic lowering the temperature of an attic that contains ducts can reduce your air conditioning costs.
However with that understanding that creating negative pressure in the attic can cause all kinds of problems sucking out air from the conditioned space possible back drafting.
I have advised him that generally speaking attic fans are a bad idea which he has come to terms with.
Alternatively install passive vents such as gable soffit and ridge vents which are openings in the roof that allow hot air to escape.
In existing homes the question is important.
By positive pressure i mean that the air pressure inside the house is higher than outside pressure which tends to push air from inside to outside.
