Active Vs Passive Attic Ventilation

Poor attic ventilation can also be a contributing factor in the formation of ice dams in winter.

Active vs passive attic ventilation.

Any unconditioned attic requires ventilation. The most common types of active vents include wind turbines wire powered vents and solar powered vents. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Our passive roof vents are ul certified and rated to withstand wind pressure in excess of 200 mph.

Passive active options. Since i want to reduce the heat load on the house to limit a c bills i need to install vents in the roof. Attic fans and powered attic ventilators pavs can provide active ventilation in attic areas. Active roof vents will exchange the air inside the attic with fresh air from the outside many times faster than passive vents.

The best way to get air moving in an attic is by using powered vents. If oversized negative pressure in the attic can suck conditioned air from the living spaces below. Use avp s roof vent calculator to determine the number and size of exhaust vents you will need. For balanced ventilation an equal amount of intake vent area net free area should also be installed.

Choose the style of vent you like and pick the size and height. Taking advantage of this natural process referred to as passive ventilation. This type of ventilation is especially important for. Below are pictures of common static roof vents also called passive roof vents and gravity roof vents.

Without some means of ventilation moisture and in summertime heat can accumulate to undesirable levels in the attic space. Active ventilation is a system that provides air circulation in indoor spaces using mechanical fans. Passive attic vent vs active attic vent my question. A vent pipe running from the sub slab of the basement up above the eave line of the roof or in the garage attic sealed and caulked cracks in the foundation there are several ways for an active mitigation system to be installed depending on the layout of the home.

I can install the simple roof louver. This is because active airflow is more consistent than passive airflow. However this type of active ventilation can do more harm than good if your home has not been properly air sealed. Active ventilation products has exhaust roof vents for both flat roofs and pitched roofs.

I can install the rotary things i can install a powered roof vent or i can install a solar powered fan vent thing.