Attic Moisture Fan

In summer the thermostat operates the fan when the attic temperature reaches a preset level usually 90 to 95 degrees f.

Attic moisture fan.

How is an attic fan controlled. The warm air escapes through the attic and to the attic vents allowing the circulation of chilly air from the windows. The whole house fan is installed inside the attic between the living space and ceiling. It is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air.

This will help to avoid premature damage to the shingles or mold building up in moist hot. The short answer to this very involved question and the pages of temperature and humidity level data you sent is yes there is a risk that moisture from humid air in your attic will condense on. By adding moisture to the lower floor you increase the partial pressure of the water vapor which pushes it to areas of lower vapor pressure like the attic. Unlike a ventilation fan a whole house fan an attic mounted fan that exhausts air from a home at night is designed to cool a house that is to lower the indoor temperature.

Whole house fans work on the principle of removing the hot and humid air out of the house. After moisture penetration is controlled as best as possible the next approach to reducing attic moisture is by controlling air infiltration. Humidity settings are another issue that can make or break the performance of your heating and cooling systems and your attic ventilation. The whole house fan and the attic venting fan.

A powered attic ventilator has a different purpose. An attic fan works by exchanging the hot air in your attic space for fresh air pulled through the vents. The difference in the two spaces is the dry bulb temperature. Simply by sealing the various possible paths of air leakage already discussed infiltration will be reduced therefore restricting the movement of air and eliminating the stack effect.

It helps to cool your home temperatures and the attic by approximately 30 degrees. This ventilation process helps lower the attic air temperature and reduce humidity levels thus reducing the. An attic fan pulls hot air out of the space and draws in cooler air from outside. If you raise the attic temperature the rh in both places would be the same.

So they equalize pretty quickly. In winter the humidistat operates the attic fan when the relative humidity exceeds a preset. The normal indoor humidity range in winter should be 15.