Attic Ventilation In The House

That s how a house breathes.

Attic ventilation in the house.

Get started indoor air quality iaq poor indoor air quality can have a negative effect on your home. That said air resistance and interference such as vent grates reduces the area of true ventilation. Cedar wood rectangular louver vent. Attic fans are intended to cool hot attics by drawing in cooler outside air from attic vents soffit and gable and pushing hot air to the outside.

Provide ventilation for your chosen location with the provide ventilation for your chosen location with the al s millworks 16 in. Air flows in through the soffit vents and out through the roof vents. Before we explore how to ventilate an attic space it is prudent to understand how much ventilation is needed. If you see dampness or frost you need better roof ventilation and some attic vents.

However if your attic has blocked soffit vents and is not well sealed from the rest of the house attic fans will suck cool conditioned air up out of the house and into the attic. Don t avoid ventilating your attic for fear you re letting cold air into the house. Ventilation can be accomplished using various products and techniques. Replacing your bathroom fan range hood or even installing a new fan.

Generally speaking you need a ratio of 1 300 where for every 300 square feet of ceiling space you need 1 square foot of attic ventilation. Your actual living space is sealed and insulated at the attic floor the attic is outside this envelope. This product measures 16 in. In many homes these intake vents come in the form of soffit vents.

Soffit vents bring in cool air and roof vents let out warm air. Heat in the attic can roast shingles from below causing them to wear prematurely. For the best results place roof ventilation near the roof s peak and soffit vents in the eaves. In other words the entire vent opening doesn t count as vented space.

Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Grab a flashlight and inspect your attic during the winter. Ventilation of attic spaces is required by most building codes as well as by roofing material manufacturers and the national roofing contractors association nrca. Most building codes require a ratio of 1 150 ventilation space to attic floor space.

It s believed that good ventilation in the attic will help prolong the life of shingles by reducing heat which maintains the shingles quality and durability. Another important element of attic ventilation is protection for the roof s shingle. Attic ventilation estimating tool. If there are asphalt shingles on your roof the attic must be ventilated to comply with the terms of the manufacturer s warranty.

Use this tool to estimate the ventilation needs for your attic and get a list of broan attic ventilation product that will meet your needs. More product details close.