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Air Vent University

 

Air Vent University


Air Vent is committed to helping roofing professionals everywhere by collecting and sharing best practices and solutions in residential attic ventilation.

Air Vent University is an extension of this commitment. Here you’ll find useful information to help you in the field now and as a reference for the future. We’ll add new “lesson plans” regularly. We’ll also mix in some fun with pop quizzes and occasional prizes. And check out our podcast, too. Welcome.

 

 

 

Use the Tabs below to switch between lesson plans and quizzes:

Lesson Plans

 

October 2020 Lesson Plan

Lean on Air Vent to Help Educate the Homeowner

 

A roofing contractor interviews Air Vent “Ask the Expert” seminar host Paul Scelsi in two quick minutes to boil down the “How’s and Why’s” every homeowner should factor in when it’s time for a new roof. NOTE: If you’d like your own customized short video with Paul, send us an email and perhaps we can arrange it via a Microsoft Teams video chat (pscelsi@gibraltar1.com).

 

dafa888,dafa888大发平台Video interview courtesy of Drew Cope, Cope Construction & Renovation, Kelton, PA.

 

 

 

 

September 2020 Lesson Plan

SLA Slant-Back Box Vent Installation Animation

 

In this short video, you’ll see how our metal, slant-back box vent (also called a roof louver or static vent) installs, including positioning on the roof, hole size and using sealant. Hope you find it helpful.

 

 

 

 

 

August 2020 Lesson Plan

Sizing NON-MOTORIZED Attic Vents for the Attic

 

 

 

dafa888,dafa888大发平台To help you determine how many NON-MOTORIZED attic exhaust vents are needed for an attic (as well as the intake vents required for those exhaust vents to perform properly), Air Vent has three different tools you can use.

 

1. Use the Air Vent App for iOS and Android devices. It’s free, easy to use and has many additional features beyond a built-in calculator.

2. Use the Air Vent Online Calculator in either its web-based version or the jazzed up spreadsheet that is customizable with your company colors and personalized text message to clients. It’s free as well.

3. Calculate it yourself by hand. You never know when a client may ask you, “Can you walk me through the math used to calculate that?

• Step One: Determine the attic square footage (measured length x width, floor of the attic). If you cannot measure the attic floor, an acceptable Plan B measurement is the footprint of the house aerial view.

 

• Step Two: Determine the Net Free Area (NFA) needed in total for the entire attic. (Note: Non-motorized vents are specified in terms of Net Free Area – the clear, unobstructed area a vent has through which air can move.) To do that, divide the attic square footage by 150 (This is based on the 1/150 ratio of attic ventilation; which is 1 square foot of NFA for every 150 square feet of attic floor space. If you want to use the 1/300 ratio, divide attic square footage by 300.) The resulting number is the total amount of NFA in square feet needed for the attic.

 

• Step Three: Balance the attic ventilation by determining the NFA needed for EXHAUST VENTS and for the INTAKE VENTS. Using the results from Step Two, divide by 2 because proper attic ventilation is balanced between EXHAUST VENTS (which will be installed at or near the peak of the roof) and INTAKE VENTS (which will be installed in the soffit/undereave or low on the roof). The resulting number is the total amount of NFA in square feet needed from the EXHAUST VENTS and the total amount of NFA in square feet needed from the INTAKE VENTS. Next, multiply by 144 (the number of square inchesdafa888,dafa888大发平台 per square foot) because non-motorized vents are specified in square inches not square feet. You now know the NFA needed in square inches for EXHAUST as well as for INTAKE.

 

• Step Four: Select the EXHAUST and INTAKE Vents Desired and Determine the Quantity.dafa888,dafa888大发平台 It’s time to pick both the EXHAUST VENT and the INTAKE VENT suitable for the size and design of the roof/attic. Once that is done, learn the vents’ NFA as rated by the manufacturer. Use that NFA number to determine the quantity by dividing the “NFA Needed” by the actual “NFA the vent provides.”

 

Here’s an example of the math start to finish.

Step One: (measure the attic) 40 feet length x 50 feet width = 2,000 square foot attic.

Step Two: (determine the NFA needed for the entire attic) 2,000 ÷ 150 = 13.3 square feet of NFA in total needed for the entire attic.

Step Three: (balance the system with EXHAUST and INTAKE vents).

‣ 13.3 square feet of NFA ÷ 2 = 6.7 square feet of EXHAUST ventilation needed as well as 6.7 square feet of INTAKE ventilation needed.

‣ (convert to square inches by multiplying by 144) 6.7 x 144 = 965 square inches of EXHAUST net free area needed, and 965 square inches of INTAKE net free area needed.

Step Four:dafa888,dafa888大发平台 (select the EXHAUST and INTAKE vents desired; determine quantity).

‣ Select an INTAKE vent desirable for the project, determine its net free area rating in square inches per unit/linear foot.

dafa888,dafa888大发平台 ✓ For example, an 8 x 16 rectangular undereave vent allows 56 square inches of net free area per unit. Thus, 965 ÷ 56 = 17 rectangular undereave vents needed.

dafa888,dafa888大发平台 ‣ Select an EXHAUST vent desirable for the project, determine its net free area rating in square inches per unit/linear foot.

dafa888,dafa888大发平台 ✓ For example, ShingleVent II ridge vent is 18 square inches of NFA per linear foot. Thus, 965 ÷ 18 = 54 linear feet of ridge vent needed.

 

 

 

July 2020 Lesson Plan

What Size Power Fan Does the Attic Need?

 

 

 

To help you size a roof-mount or gable-mount power attic fan (whether traditional electric or solar powered) for an attic, Air Vent has three different tools you can use.

 

1. Use the Air Vent Appdafa888,dafa888大发平台 for iOS and Android devices. It’s free, easy to use and has many additional features beyond a built-in calculator.

2. Use the Air Vent Online Calculatordafa888,dafa888大发平台 in either its web-based version or the jazzed up spreadsheet that is customizable with your company colors and personalized text message to clients. It’s free as well.

3. Calculate it yourself by hand. You never know when a client may ask you, “Can you walk me through the math used to calculate that?”

• Step One: Determine the attic square footage (measured length x width, floor of the attic). If you cannot measure the attic floor, an acceptable Plan B measurement is the footprint of the house aerial view.

 

• Step Two:dafa888,dafa888大发平台 Determine the CFM needed from the power attic fan to service the attic. Multiply the attic square footage by a factor of 0.7 (this produces 10-12 air exchanges per hour from the power attic fan). The resulting number is the CFM (Cubic Feet of air moved per Minute) needed from the power attic fan to properly exhaust the attic. Find a power attic fan with the required CFM or close to it. NOTE: It’s OK to have more CFM than needed as long as the fan(s) are given the necessary amount of intake ventilation (at the soffit/eave or low on the roof near its edge). That’s the next step.

 

• Step Three: Give the power attic fan proper intake ventilation. The amount of intake ventilation a power attic fan needs is based on its CFM. If the attic requires more than one power attic fan, this formula applies to each fan used or installed for the project. Here’s the formula:

‣ CFM of the power attic fan ÷ 300 = Square feet of intake net free area needed.

dafa888,dafa888大发平台 ‣ Since intake vents are rated/specified in square inches (not square feet), it’s necessary to convert from square feet to square inches. That is easily accomplished by multiplying by 144 (the number of square inches per square foot).

dafa888,dafa888大发平台 ‣ Once you know the intake ventilation net free area needed in square inches, find an intake vent best suited for the project, identify its net free area in square inches (each manufacturer should publish that number) and determine how many units/feet of intake vent are needed.

 

Here’s an example of the math start to finish.

Step One: (measure the attic) 40 feet length x 50 feet width = 2,000 square foot attic.

Step Two: (determine CFM of the fan needed) 2,000 x 0.7 = 1,400 CFM power attic fan needed.

Step Three:dafa888,dafa888大发平台 (give the power attic fan proper intake ventilation).

dafa888,dafa888大发平台 ‣ 1,400 ÷ 300 = 4.7 square feet of intake ventilation net free area needed.

‣ (convert to square inches by multiplying by 144) 4.7 x 144 = 677 square inches of intake ventilation net free area needed.

‣ Select an intake vent desirable for the project, determine its net free area rating in square inches per unit/linear foot.

‣ For example, an 8" x 16" rectangular undereave vent allows 56 square inches of net free area per unit. Thus, 677 ÷ 56 = 12 rectangular undereave vents needed.

 

 

 

June 2020 Lesson Plan

What Good Are Attic Exhaust Vents? They’re Not Without Proper Intake Vents

 

Overlooking intake ventilation is the #1 mistake in residential attic ventilation.
Read why these roofing contractors work hard to avoid it.

 

 

 

 

 

 

May 2020 Lesson Plan

ShingleVent II Installation Animation

 

In this quick video you’ll see how our four-foot stick ridge vent ShingleVent II installs, including roof pitch requirements, slot cut and the ever important, often overlooked intake ventilation needs. Hope you find it helpful.

 

Take the 5-Question Quiz

 

 

 

 

 

April 2020 Lesson Plan

Attic Ventilation Educational Video
(Shortened version of the “Ask the Expert” Seminar)

 

This video is extracted from the annual Air Vent Seminar “Attic Ventilation: Ask the Expert™” held in-person for roofing professionals across North America every 1st quarter. The seminar is an overview of residential attic ventilation best practices, solutions, categories of intake & exhaust vents, and much more.

 

Take the 5-Question Quiz

 

 

Ask the Expert Seminar: Early Notification

To be added to the email list to attend a future in-person seminar, please add your email address below, and we'll notify you when our annual Ask the Expert schedule is announced.

Click here for additional information about the “Attic Ventilation: Ask the Expert™” seminars.

 

 

 

 

 

 

 

 

Quizzes

 

Quiz: SLA Slant-Back Box Vent Installation Animation (based on the September 2020 Lesson Plan)

 

View our September 2020 Lesson Plan: SLA Slant-Back Box Vent Installation Animation

To test your knowledge about what you learned in the September 2020 Lesson Plan featuring the “SLA Box Vent Installation Animation,” please take our short 5-question Pop Quiz.

Your answers will be “graded” as you go, so you’ll know immediately if you were right or wrong.

 

EXTRA CREDIT: Anytime you take any of our Pop Quizzes (from any month, at any time) your name is automatically entered into the current random drawing for a FREE Air Vent golf shirt (10 shirts per month, every month as long as you register).

 

 

 

 

 

 

 

 

Quiz: Sizing NON-MOTORIZED Attic Vents for the Attic (based on August 2020 Lesson Plan)

 

View our August 2020 Lesson Plan: Sizing NON-MOTORIZED Attic Vents for the Attic

To test your knowledge about what you learned in the August 2020 Lesson Plan featuring the calculations used for “Sizing NON-MOTORIZED Attic Vents for the Attic,” please take our short 5-question Pop Quiz.

Your answers will be “graded” as you go, so you’ll know immediately if you were right or wrong.

 

EXTRA CREDIT: Anytime you take any of our Pop Quizzes (from any month, at any time) your name is automatically entered into the current random drawing for a FREE Air Vent golf shirt (10 shirts per month, every month).

 

 

 

 

 

 

 

 

Quiz: What Size Power Fan Does the Attic Need? (based on July 2020 Lesson Plan)

 

View our July 2020 Lesson Plan: What Size Power Fan Does the Attic Need?

To test your knowledge about what you learned in the July 2020 Lesson Plan featuring the calculations used for “What Size Power Fan does the Attic Need?” please take our short 5-question Pop Quiz.

Your answers will be “graded” as you go, so you’ll know immediately if you were right or wrong.

 

EXTRA CREDIT: Anytime you take any of our Pop Quizzes (from any month, at any time) your name is automatically entered into the current random drawing for a FREE Air Vent golf shirt (10 shirts per month, every month). Optional giveaway registration will occur after completion of the quiz.

 

 

 

 

 

 

 

 

Quiz: Attic Exhaust Vents without Intake Vents are Useless (based on June 2020 Lesson Plan)

 

To test your knowledge about what you learned in the June 2020 Lesson Plan featuring the industry article “What Good are Attic Exhaust Vents? They’re not without Proper Intake Vents,” please take our short 5-question Pop Quiz.

dafa888,dafa888大发平台 Your answers will be “graded” as you go, so you’ll know immediately if you were right or wrong.

 

EXTRA CREDIT:dafa888,dafa888大发平台 Anytime you take any of our Pop Quizzes (from any month, at any time) your name is automatically entered into the current random drawing for a FREE Air Vent golf shirt (10 shirts per month, every month). Optional giveaway registration will occur after completion of the quiz.

 

 

 

 

 

 

 

 

Quiz: ShingleVent II Installation Animation (based on May 2020 Lesson Plan)

 

To test your knowledge about what you learned in the May 2020 Lesson Plan , please take our short 5-question Pop Quiz.

dafa888,dafa888大发平台 Your answers will be “graded” as you go, so you’ll know immediately if you were right or wrong.

 

EXTRA CREDIT:dafa888,dafa888大发平台 Anytime you take any of our Pop Quizzes (from any month, at any time) your name is automatically entered into the current random drawing for a FREE Air Vent golf shirt (10 shirts per month, every month). Optional giveaway registration will occur after completion of the quiz.

 

 

 

 

 

 

 

Quiz: Attic Ventilation Educational Video (based on April 2020 Lesson Plan)

 

To test your knowledge about what you learned in the April 2020 Lesson Plan featuring our , please take our short 5-question Pop Quiz. Your answers will be “graded” as you go, so you’ll know immediately if you were right or wrong.

 

EXTRA CREDIT: Anytime you take any of our Pop Quizzes (from any month, at any time) your name is automatically entered into the current random drawing for a FREE Air Vent golf shirt (10 shirts per month, every month). Optional giveaway registration will occur after completion of the quiz.

 

 

 

Podcast

 

Airing it Out with Air Vent is a podcast focusing on residential attic ventilation best practices, tips, and solutions. It is an extension of our popular Attic Ventilation: Ask the Expert in-person seminars held for residential roofing professionals across North America every winter. Listen to episodes below, or find us on your favorite Podcast Network.

 

 

 

Episode 6 - Roofers VENT about Homeowners

 

Episode 6: Not every homeowner agrees with the residential roofing contractor’s assessment of the attic ventilation improvements needed. They want a new roof but not necessarily attic ventilation fixes. Sometimes it’s due to price. Sometimes it’s the homeowner’s refusal to understand the project. In this episode of Airing it Out with Air Vent, we let roofing contractors VENT about homeowners.

 

Download .mp3 File       

 

A special thank you to all who contributed to this podcast episode!

Jeff Heitzenrater
dafa888,dafa888大发平台 Triple Peaks Roofing and Construction - Olmstead Falls, Ohio

Matt Cooper
Redemption Roofing - Conroe, Texas

Corey Ballweg
dafa888,dafa888大发平台 Mid-Towne Construction - Cross Plains, Wisconsin

Clayton Putman
Elite Roofing - Denver, Colorado

Greg Pike
Campo Roofing - Twinsburg, Ohio

Sabrina Johnson
KDCO Home Improvement - Akron, Ohio

Chris Arrington
Arrington Roofing - Dallas, Texas

Jeff Barnett
Barnett Roofing & Siding - Canton, Michigan

Richard Turner
R. J. Turner Remodeling - Winston Salem, North Carolina

Patrick Readyhough
Pond Roofing Company - Fairfax, Virginia

 

 

Have a suggestion for a future Podcast topic? Add it below and we'll select the best ideas for future episodes

 

Episode 5 - Costly Lesson Learned After Skipping Attic Inspection

 

Episode 5: It’s hot in the attic. Getting inside the attic can be tricky. And navigating around is not always easy. But skipping an attic inspection prior to installing a new roof could result in a costly callback – possibly a brand new roof paid for by the roofing contractor. In this episode of Airing it Out with Air Vent, Pond Roofing shares its story.

 

Download .mp3 File       

 

A special thank you to Patrick Readyhough of in Fairfax, Virginia for sharing his story for this podcast episode!

 

 

Have a suggestion for a future Podcast topic? Add it below and we'll select the best ideas for future episodes

 

Episode 4 - 2nd Most Common Attic Ventilation Mistake

 

Episode 4: Sometimes a homeowner or a roofing contractor or even the HVAC contractor during a house call suggests adding a second type of attic exhaust vent to boost the vents already in place. In this episode of Airing it Out with Air Vent, residential roofing pros share their first-hand stories of why mixing types of attic exhaust vents is a problem to avoid.

 

Download .mp3 File       

 

A special thank youdafa888,dafa888大发平台 to all who contributed to this podcast episode!

Ron Gonzalez
Roofing Contractor - Aurora, Illinois

Trevor Atwell
Atwell Exterior Services - Greenville, North Carolina

Tim Chapin
Your Safe and Healthy Home - Akron, Ohio

Paul Vosen
Degenhardt Home Improvement - Madison, Wisconsin

Scott Dennison
Dennison Exterior Solutions & Gutter Topper - Saint Joseph, Michigan

Shawn Bellis
Epic Exteriors - Overland Park, Kansas

Ron Bastian
Bastian Roofing - Richfield, Wisconsin

Sean Toms
S & K Roofing - Eldersburg, Maryland

Tom Picha
dafa888,dafa888大发平台 Affordable Roofing - Aurora, Illinois

 

 

Have a suggestion for a future Podcast topic? Add it below and we'll select the best ideas for future episodes

 

Episode 3 - #1 Attic Ventilation Mistake Across North America

 

Episode 3: No amount of attic exhaust ventilation can overcome the lack of intake ventilation at the eave/soffit or roof’s lowest edge. In this episode of Airing it Out with Air Vent, residential roofing pros explain why they ensure attic ventilation includes exhaust and intake.

 

Download .mp3 File       

 

A special thank you to all who contributed to this podcast episode!

Sue McCollum May
A Better Way Construction and Roofing - Lincoln, Nebraska

Chris Arrington
Arrington Roofing - Dallas, Texas

Jeff Barnett
Barnett Roofing & Siding - Canton, Michigan

Clayton Putman
Elite Roofing - Denver, Colorado

Greg Pike
Campo Roofing - Twinsburg, Ohio

Sandra Daffer
dafa888,dafa888大发平台 Hawaiian Built Roofing - Boise, Idaho

Sean Jegen
Gorilla Exteriors Contracting - Shawnee, Kansas

Sean Toms
S & K Roofing - Eldersburg, Maryland

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Have a suggestion for a future Podcast topic? Add it below and we'll select the best ideas for future episodes

 

Episode 2 - Top 10 Residential Attic Ventilation Tips from the Field

 

Episode 2: The most qualified people to offer tips and guidance for avoiding mistakes and callbacks are the very people who have first-hand experience with the issue. In this episode of Airing it Out with Air Vent, we asked residential roofing pros to give us their top attic ventilation tips based on what they have seen in the field.

 

Download .mp3 File       

 

 

A special thank you to all who contributed to this podcast episode!

 

Scott Dennison
Dennison Exterior Solutions - St. Joseph, Michigan

Tom Picha
dafa888,dafa888大发平台 Affordable Roofing - Aurora, Illinois

Sabrina Johnson
KDCO Home Improvements - Akron, Ohio

Shawn Bellis
EPIC Exteriors - Overland Park, Kansas

Sean Toms
S & K Roofing - Eldersburg, Maryland

Corey Ballweg
Mid Towne Construction - Cross Plains, Wisconsin

Jeff Heitzenrater
Triple Peaks Roofing & Construction - Olmstead Falls, Ohio

Richard Turner
dafa888,dafa888大发平台 RJ Turner Remodeling - High Point, North Carolina

Jake Jacobson
SF5 Construction - Little Elm, Texas

Trevor Atwell
dafa888,dafa888大发平台 Atwell Exterior Services - Greenville, North Carolina

Tim Chapin
Your Safe and Healthy Home - Akron, Ohio

Ron Bastian
dafa888,dafa888大发平台 Bastian Roofing - Richfield, Wisconsin

Jerry Becker
Roof Life of Oregon - Tigard, Oregon

Sue May
dafa888,dafa888大发平台 A Better Way Construction & Roofing - Lincoln, Nebraska

Paul Vosen
dafa888,dafa888大发平台 Degenhardt Home Improvement - Madison, Wisconsin

Steve DuCharme
dafa888,dafa888大发平台 Innovative Builders Roofing & Construction - Edmond, Oklahoma

 

 

Episode 1 - Most Homes Have Incorrect Attic Ventilation. So What?

 

Episode 1: Most attics have incorrect or insufficient ventilation. Our survey shows it’s 77% of today’s homes. So What? In this episode of Airing it Out with Air Vent, we dive deep into the potential consequences of improperly ventilated attics and explain why it matters.

 

Download .mp3 File       

 

 

 

 

 

 

 

 

Air Vent Contractor LocatorOur exclusive Contractor Locator will allow you to find contractors in your area who can assist with Air Vent product installation—including solar attic fans and skylight tubes. Click the link below to register and get started.

 

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