Passive Vs Active Attic Ventilation

Passive attic vent vs active attic vent my question.

Passive vs active attic ventilation.

Active ventilation actively draws air our of the attic. The paper compares between passive and active turbine ventilators. This type of ventilation is especially important for. Choose the style of vent you like and pick the size and height.

Below are pictures of common static roof vents also called passive roof vents and gravity roof vents. 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 rotary things i can install a powered roof vent or i can install a solar powered fan vent thing. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents.

I can install the simple roof louver. Taking advantage of this natural process referred to as passive ventilation. Active ventilation products has exhaust roof vents for both flat roofs and pitched roofs. Since i want to reduce the heat load on the house to limit a c bills i need to install vents in the roof.

The best way to get air moving in an attic is by using powered vents. The most common types of active vents include wind turbines wire powered vents and solar powered vents. Active roof vents use a motor fan blade or turbine to exhaust air from the attic. Passive wind driven turbine ventilator is inappropriate approach in tropics.

To understand which is recommended you have to first understand which each type of ventilation is. What are active roof vents. Most local and state building codes require a minimum of 1 foot of passive ventilation for every 300 square feet of attic floor space. Active ventilation is a system that provides air circulation in indoor spaces using mechanical fans.

The paper summarizes the most pioneer studies of hybrid turbine ventilators that use solar panel. These type of vents are measured for the amount of cubic feet of air they move per minute cfm. A well insulated well designed home may only need to use active ventilation for rooms where moisture is generated bathroom laundry and kitchen while passive ventilation will be sufficient for maintaining air quality through the rest of your home. A simple passive system uses no energy will work just as well for free as a powered active system and in almost all instances has the benefit of being silent.