How Does Attic Ventilation Work

Fresh air is pulled in from your soffits and or roof vent creating a draft through your attic.

How does attic ventilation work.

The purpose of attic ventilation is so that heat can leave the attic when the air conditioner turns on and is trying to circulate cold air around the house. When it is cold outside the ventilation system will work by maintaining the cold temperature so that ice will not melt on the roof and create ice dams. In cold climates the primary purpose of attic or roof ventilation is to maintain a cold roof temperature to control ice dams created by melting snow and to vent moisture that moves from the conditioned space to the attic ventilation acts to bypass the vapour barrier created by most roof membranes. Soffit vents may leave air trapped at the top of your attic.

It promotes a cool dry attic. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents. In such doing the attic fan will reduce the temperature in the attic space that in turn cools down the whole house. Proper attic ventilation offers all these benefits.

While it may seem silly to meticulously cover a home with insulation only to leave a place for air to escape the attic vent serves a few important purposes. An attic fan works by drawing in cool air to the attic space that pushes out the hot air through vents. Attic fans exhaust hot air from your attic to the outside. About attic ventilation natural attic ventilation.

It helps prevent moisture from becoming trapped in insulation structural wood shingles and roof deck it. This prevents hot air from seeping into your home and driving up the temperature in the living space which reduces the load on your air conditioner. The attic fans are fitted with thermostats that will switch on and off the fan depending on the homeowner s preference. An attic ventilator is essentially a port where air can escape to the outdoors.

Ideally this will lower the high temperatures that have built up in your attic. Most effective ventilation uses a ridge and soffit continuous ventilation system but even these designs can vary from roof to roof. Attic ventilation fans help cool air your attic by pushing out the stifling hot air from inside the attic and bringing in cool air from outside. At first it may seem odd to add insulation for warmth and then purposely allow cold air to.

Static roof line vents are effective for ventilation but generally aren t recommended due to issues with leaks. This air is then exhausted through the fan to the outside. It allows outside air to flow naturally upward and out of attic. Hot air exhaust vents located at the peak of the roof allow hot air to escape.

Intake vents located at the lowest part of the roof under the eaves allow cool air to enter the attic. It helps minimize the impact of ice damming.