Attic Ventilation Ratio

Vent Area Ratios Attic Ventilation Soffit Intake To Ridge Outlet Air Flow Or Square Inches Ratio Attic Ventilation Ventilation Ventilation Design

Vent Area Ratios Attic Ventilation Soffit Intake To Ridge Outlet Air Flow Or Square Inches Ratio Attic Ventilation Ventilation Ventilation Design

Common Types Roof Attic Vents Types Of Roof Vents Attic Vents Roof Vent Covers

Common Types Roof Attic Vents Types Of Roof Vents Attic Vents Roof Vent Covers

Individual Roof Slope Angle Sims 2 Denver Roof Repair Ladrillo Construccion Madera

Individual Roof Slope Angle Sims 2 Denver Roof Repair Ladrillo Construccion Madera

Roof Pitch Calculator Roof Truss Design Pitched Roof Building Roof

Roof Pitch Calculator Roof Truss Design Pitched Roof Building Roof

Radiant Barrier Stapled Up Over Duct Work In Attic To Keep Ducts More Efficient By Stopping Radiant Heat Gain From Foil Insulation Radiant Barrier Radiant Heat

Radiant Barrier Stapled Up Over Duct Work In Attic To Keep Ducts More Efficient By Stopping Radiant Heat Gain From Foil Insulation Radiant Barrier Radiant Heat

Pin By Lisa Feringa On Architectural Details Roof Truss Design How To Plan Roof Insulation

Pin By Lisa Feringa On Architectural Details Roof Truss Design How To Plan Roof Insulation

Pin By Lisa Feringa On Architectural Details Roof Truss Design How To Plan Roof Insulation

Ventsure inflow intake vent.

Attic ventilation ratio.

So in our example we will divide the 1 500 square feet by 300. Proper attic ventilation consists of a balance between air intake at your eaves soffits or fascias and air exhaust at or near your roof ridge. The recommended ventilation ratio to provide for vented attic assemblies when an air barrier is present is the 1 300 ratio as specified by most building codes. Ok so now we know the square footage of the attic area to be ventilated.

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. Attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. Ventilation manufacturers assign an nfa value to the non motorized vents they make.

According to the national roofing contractors association nrca a power vent with an airflow rate of 1 0 cubic foot per minute per square foot of attic space measured at the attic floor is generally considered to be equivalent to a 1 150 ventilation ratio. This is based principally on good historical experience and simple psychrometric analysis handegord giroux 1984. Now let s figure out how much ventilation space we need. Choose one of the following products to meet the recommended intake nfva of 528 square inches.

1 square foot of nfva per 300 square feet of attic floor if a vapor barrier is installed on the ceiling below. Without exception you should talk to a professional to determine what your home requires. 1 square foot of net free vent area nfva per 150 feet of attic floor. The following product options will allow you to achieve an intake nfva of 528 square inches.

You can also contact your local municipality to check on building code in your area. Remember the minimum area requirement when using a continuous system is a ratio of 1 300. Nfa is the unobstructed area through which air can pass through a vent usually measured in square inches. Attic square footage 2 square inches of exhaust and square inches of intake net free area nfa needed.

What does the code require. Intake vents located at the lowest part of the roof under the eaves. Allows cool dry air to enter the attic.

Gm 0905 Irc Faq Conditioned Attics Conditioner Plastic Insulation Attic Insulation

Gm 0905 Irc Faq Conditioned Attics Conditioner Plastic Insulation Attic Insulation

Metal Roofing Ridge Vents Fibreglass Roof Roof Design Roofing

Metal Roofing Ridge Vents Fibreglass Roof Roof Design Roofing

Flat Vent Snow Shake Roof Architecture Details Attic Ventilation

Flat Vent Snow Shake Roof Architecture Details Attic Ventilation

This Goes Back To Something The Romans Actually Did It Is Called A Solar Chimney It Turns Out That The Soil About 5 Solar Chimney Sustainable Energy Energy

This Goes Back To Something The Romans Actually Did It Is Called A Solar Chimney It Turns Out That The Soil About 5 Solar Chimney Sustainable Energy Energy

Pin By Joel Smith On Plans Details Architecture Details Construction Drawings Building Design

Pin By Joel Smith On Plans Details Architecture Details Construction Drawings Building Design

6 Reasons You Should Choose Energy Efficient Homes Energy Efficient Homes Energy Efficient House Plans Energy Efficient House Design

6 Reasons You Should Choose Energy Efficient Homes Energy Efficient Homes Energy Efficient House Plans Energy Efficient House Design

Image Result For Roof Flat Detail Green Roof Building Roof Roof Architecture

Image Result For Roof Flat Detail Green Roof Building Roof Roof Architecture

Pin On Front Exterior

Pin On Front Exterior

Semi Rigid Ducting Is One Of More Popular Air Distrubutions Ductwork Type For The Ventilation System With Heat Bedroom Ventilation Ventilation Ventilation Duct

Semi Rigid Ducting Is One Of More Popular Air Distrubutions Ductwork Type For The Ventilation System With Heat Bedroom Ventilation Ventilation Ventilation Duct

Baby It S Hot Outside Whole House Fan University Of Colorado Boulder Natural Home

Baby It S Hot Outside Whole House Fan University Of Colorado Boulder Natural Home

A Better Roof Ridge Vent Ridge Vent Corrugated Plastic Roofing

A Better Roof Ridge Vent Ridge Vent Corrugated Plastic Roofing

Flat Roof Insulation Warm Roofs Proshield Warm Roof Flat Roof Construction Flat Roof

Flat Roof Insulation Warm Roofs Proshield Warm Roof Flat Roof Construction Flat Roof

Explore Radiant Barrier And Other Energy Efficient Roof System Options Radiant Barrier Air Conditioning Repair Air Conditioning Services

Explore Radiant Barrier And Other Energy Efficient Roof System Options Radiant Barrier Air Conditioning Repair Air Conditioning Services

Information About Aerolam Premium Roof Insulation Insulation Materials Bubbles

Information About Aerolam Premium Roof Insulation Insulation Materials Bubbles

If Cement Is Blended With Sand Stone Aggregates And Water A Paste Will Be Developed And It Can Be Ap Grade Of Concrete Concrete Mix Design Concrete Mix Ratio

If Cement Is Blended With Sand Stone Aggregates And Water A Paste Will Be Developed And It Can Be Ap Grade Of Concrete Concrete Mix Design Concrete Mix Ratio

Pin By Aci Groups On Air Ventilatores Air Ventilator Air Ventilation System Air Ventilation

Pin By Aci Groups On Air Ventilatores Air Ventilator Air Ventilation System Air Ventilation

Viper Cs Is A Vapor Barrier Designed Specifically For Controlling Moisture Migration In Crawl Space Applications Crawlspace Crawl Space Vapor Barrier

Viper Cs Is A Vapor Barrier Designed Specifically For Controlling Moisture Migration In Crawl Space Applications Crawlspace Crawl Space Vapor Barrier

28 Types Of Roof Designs Styles With Pictures Roof Design Roof Gable Roof

28 Types Of Roof Designs Styles With Pictures Roof Design Roof Gable Roof

Https Encrypted Tbn0 Gstatic Com Images Q Tbn 3aand9gctzbs1hiikn0fbgulluwpppeapcahohnnbf4qnfs8y1or Eymrv Usqp Cau

Https Encrypted Tbn0 Gstatic Com Images Q Tbn 3aand9gctzbs1hiikn0fbgulluwpppeapcahohnnbf4qnfs8y1or Eymrv Usqp Cau

It S Easy When You Know How Passive Solar Heating Passive Solar Heating Systems Passive Solar Heating Passive Solar Design Passive Solar

It S Easy When You Know How Passive Solar Heating Passive Solar Heating Systems Passive Solar Heating Passive Solar Design Passive Solar

A Comprehensive Overview On Home Decoration In 2020 Solar Greenhouse Greenhouse

A Comprehensive Overview On Home Decoration In 2020 Solar Greenhouse Greenhouse

Bouldering In The Attic Home Climbing Wall Bouldering Wall Rock Climbing Wall

Bouldering In The Attic Home Climbing Wall Bouldering Wall Rock Climbing Wall

D Studio Architecture P C Arhitektura

D Studio Architecture P C Arhitektura

Method Statement For Hvac Ductwork Insulation And Acoustic Lining Duct Work Hvac Ductwork Hvac

Method Statement For Hvac Ductwork Insulation And Acoustic Lining Duct Work Hvac Ductwork Hvac

Source : pinterest.com