Shop Roof VentsSolar Attic FansGravity VentilatorsStatic VentsRoof Mounted Power Attic VentilatorsRoof LouversRoof Jack Vent Caps, Pitch Pans & Roof Curbs

AVP Supports the Architectural & Building Code Specification Communities For The 2021 Building Construction Year. Improve your attic ventilation with AVP's roof vents.

As of August 28, 2020 AVP has been Identified as a High Volume Supplier to The Home Depot.

Featured Roof Vents
Exhaust Roof Vents
Intake Roof Vents
Roof Exhaust Fans
Solar Roof Exhaust Fans
Roof Jack Vent Caps
Rooftop Ventilation
Residential Aura Gravity Vent

The Aura Gravity Vent is an exhaust vent that removes heat from the attic in the summer and moisture in the winter. It functions as a spinning roof turbine but without moving parts.[More...]

Residential Static Vent

AVP's Round Back Static Vent is an exhaust vent for steep-slope ventilation. When it's near the roof peak, it will exhaust air from the attic for proper ventilation.[More...]

Round Back Roof Jack Shown in Black
The Round Back Roof Jack is for ventilating bathroom fans or other duct applications. In addition, the round design is aerodynamic to withstand wind speeds up to 200 mph.[More...]
Universal Dormer Vent
The Universal Dormer Vent is an off ridge vent that can be used as an exhaust or intake vent. This vent is capable of installation on roofs with a pitch of 3/12 or greater. [More...]
Aura Retrofit
This Vent is a perfect replacement for "Whirlybirds" Roof Turbines. The Aura Gravity Vent Retrofit does not need to spin in order to provide excellent ventilation. [More...]
Round back Solar Attic Fan
The Round Back Solar Fan is an exhaust fan that runs on both solar and wind power. It works best in bright direct sunlight however, it will vent passively with wind power.[More...]
Pop Vent on shingle roof
AVP's Pop Vent is used for ventilating steep slope roofs. The Air Exhaust Roof Louver removes moisture in the winter and heat in the summer to extend the life of the building structure.  [More...]
Assortment of PVC caps
The Aura PVC Vent Cap is perfect for ventilating vapors and particles from the PVC pipe. This Vent Cap can be for both commercial and residential applications. [More...]
Pop Vent with Curb Mount Flange installed
This Air Intake Pop Vent is ideal for maintaining proper attic ventilation. Our line of intake vents allows your exhaust vents to work efficiently by bringing in fresh air. [More...]
Commercial Aura Vent with Curb Mount Flange installed

The Aura Gravity Vent with Curb Mount Flange will fit over Roof Curbs. This allows for additional height to protect the vent as well as for installation on flat roofs.[More...]

Round Back Roof Vent with Curb Mount Flange
AVP's Round Back Static Vent with Curb Mount Flange is meant to be installed on Roof Curbs. In addition, it works as both an exhaust vent and as an air intake vent.[More...]
Ground of 3 Soffit Vents
The Soffit Vent is an air intake vent that goes underneath the eaves. When combined with exhaust vents, the soffit vents allow fresh air to create proper airflow.[More...]
The Keepa Attic Vent is built for Flat Roof Ventilation. This vent can be an exhaust vent or as an intake vent for ventilating attics and or plenums.[More...]
This Round Back Attic Fan is a small low profile residential exhaust fan. It will exhaust air continuously even when the motor is off by using wind power.[More...]
The Keepa Roof Jack is used for ventilating bathroom fans or other duct applications. The tall collar height allows for flat roof ventilation in all climate zones.[More...]
Pitch Pan - Pitch Pocket
Secure irregular roof penetrations with Pitch Pans - A Retrofit Flashing Kit. A pitch pan is a flanged, open-bottom, metal container that wraps around roof penetrations.[More...]
Roof Jack with curb mount flange
The Round Back Roof Jack with Curb Mount Flange is for ventilating bathroom fans or other duct applications. The curb mount flange will fit on top of roof curbs on flat roofs. [More...]
roof curb - prefabricated roof curbs
Roof Curbs will fit a Vent or Fan with a Curb Mount Flange of the same diameter. Save time and money with AVP's lightweight, heavy-gauge aluminum roof curbs. [More...]
Residential Aura Gravity Vent
Residential Gravity Ventilator in Grey

Exhaust out hot air in the summer and damp wet air in the winter

Commercial Aura Vent with Curb Mount Flange installed
Commercial Gravity Vent with a curb mounted flange

What do Roof Exhaust Vents do?

Roof exhaust vents remove heat and moisture from the attic during the summer. In addition to removing moist damp air during the winter. This benefits the attic because it will keep dry insulation. Dry insulation prevents mold and mildew from growing. 

Where do I install Roof Exhaust Vents?

In order for roof exhaust vents to work efficiently, they must be near the peak of the roof. This is because hot air rises and will naturally collect near the peak.

What type of Roof Exhaust Vent should I use?

There are many roof exhaust vents to choose from, and choosing the right one may seem difficult. After all, not all roofs are the same. This is why AVP offers to assist all customers with their roof vent choices.

What if I can’t find the Roof Vent I’m looking for?

All roof vents are customizable. Choose your color, diameter, height, curb mount flange and/or tailpiece adapter for duct systems.

What if I have a flat roof?

Vents for a flat roof tend to be built differently than vents for a steep roofs. The main difference is the height of the vent. Vents for a flat roof need to be built taller. AVP offers vents for both roof types. For more information on roof exhaust vents for flat roof applications please click on: Aura VentsAura Vents with Curb Mount Flanges, Round Back Vents with Curb Mount FlangesKeepa Vents and Witches Hat Vents.

Commercial Pop Vent with Curb Mount Flange
Pop Vent Roof Louver Air Intake - PV-20-C12-CMF
Group of soffit vents, width of 10in.
Group of Soffit Vents - Width of 10in.

The Aura Attic Fan exhausts air for proper attic ventilation. This fan will exhaust air continuously even when the motor is off. It also works passively because of the Venturi Effect. This occurs when the wind blows against the outer louver to create an upward draft. As a result, allowing air to freely flow in and out. Aura Attic Fans remove hot humid air during the summer and moist damp air during the winter. This not only keeps the insulation dry but will lengthen the life of the roof.

AVP offers exhaust fans with both flat flange and curb mount flange options. In addition to solar fans.

Attic Fan with Curb Mount Flange shown from bottom
Aura Solar Fan
Aura Solar Fan Installed on a Pitched Roof

Receive Solar Powered Ventilation for a more energy-efficient home

Round Back Solar Attic Fan
Round Back Solar Roof Fan Painted Black

Round Back Roof Jack for Pitched Roofs

Residential Roof Jack Vent Cap in Black

Keepa Roof Jack Vent Caps for Flat Roofs

Commercial Roof Jack Vent Cap in White

AVP's Roof Jack Vent Caps are designed for ducted ventilation 

The Round Back Roof Jack Vent Cap is for steep-sloped roofs; while on the other hand, the Keepa Roof Jack Vent Cap is for flat or low sloped roofs. Both roof jack vent caps are ideal for ventilating bathroom fans and range hoods. All roof jacks are made of rust-free aluminum and come with a 2-inch tailpipe.

The inner vertical louvers not only ventilate the duct efficiently but also act as an insect screen. In addition, the round aerodynamic design allows the vent to deflect wind and debris. Both Roof Jacks come in an array of sizes allowing for installation in all climate zones.

Roof Jack Exhaust Diagram

Ventilation Systems Balance Intake and Exhaust

Proper ventilation will remove excess heat during the summer and moisture during the winter. As a result, extending the life of the roof and the efficiency of the HVAC systems. In addition, having a balance of exhaust and intake air will keep insulation dry. Having proper roof ventilation is beneficial in all climate zones. For exhaust vents, we recommend our Aura Gravity Ventilators as they come in an array of sizes. For intake air, we have Pop Vents and Soffit Vents to balance your attic ventilation. 

Proper ventilation is when you have equal amounts of air exhaust with air intake. Exhaust vents go on the upper portion of the roof, meaning no lower than 2ft from the peak. While on the other hand, air intake must be on the lower end of the roof. 

Active Ventilation Product’s line of roof air exhaust and air intake ventilators provide the necessary ventilation functions. Find the most common types of roof vents here.

At AVP, our focus is on our Customers

With over 24 years of experience, we know how to manufacture ventilation. We harness the force of nature to circulate air in your home. The following pages will help to explain the different types of ventilation systems. Each will help explain how to keep your home cool with your type of roof.

Here is an article of a nearby installation of over 100 of our roof vents for a large commercial complex.

AVP President, Martin Kolt, next to an installation in Teaneck, NJ

This installation had existing wooden roof curbs. This Pop Vent installation was done in just a few minutes right before a major rainstorm. To the left, you can see the Pop Vent. The bottom image shows the inside of the wooden roof curb. To the right is AVP's Aura Gravity Vent which is ideal for exhausting air. In order to have proper ventilation, you will need a balance of intake and exhaust air. 

Pitch Pocket Group

Group of 3 shown for size comparison 

Open Pitch Pan - Pitch pocket

Square pitch pan 

Pitch Pan Rectangle

Rectangle pitch pan

Secure irregular roof penetrations with Pitch Pans - A Retrofit Flashing Kit

A pitch pan is a flanged, open-bottom, metal container that wraps around roof penetrations. They are with mastic material to provide a water-tight seal. In other words, a pitch pan is a retrofit roof flashing kit.  Also known as a pitch pocket, they function as a container to hold fluid sealant to seal all roof penetrations. They effectively secure odd-shaped penetrations to prevent leaks. Some of these roof penetrations may include electrical conduit, I-beam support, or plumbing.

Pitch Pan Roof Flashing: Used with HVAC systems, TPO, PVC, and EPDM roofs.

Pitch pans – pitch pockets are for flashing roof penetrations that would be difficult to flash in any other way.  They will work with all roof types such as TPO, PVC, and EPDM. Pitch pans will also work with all HVAC systems to ensure a leak-proof seal. AVP’s pitch pocket will prevent leaks from occurring right at the roof penetration. The open pitch pocket design is ideal for wrapping around electrical conduit, I-beam support, and plumbing. This allows for easy installation while eliminating the risk of leakage.

AVP’s pitch pan shapes also vary from square boxes to rectangular boxes. Square pitch pockets are ideal for containing single penetrations; while on the other hand, the rectangle pitch pockets are made to contain multiple small penetrations close together. As a result, every customer will be able to find a pitch pocket to fit all roofing needs.

Meet One of Our Valuable Members Here at AVP

Jose Ramirez Lopez is shown here with an Industrial Sized Aura Ventilator, AV-42-C6-CMF in white with a Curb Mount Flange. Jose has been a painter for many years. Immigrating from Honduras 12 years ago, this father and grandfather works tirelessly at Active Ventilation Products to ensure that orders ship on time. His work ethic, positive attitude and friendliness to others at the factory is greatly valued as he is one of AVP’s key members.

Apollo 11 Space Capsule Replica Ventilated with the Pop Vent

The Pop Vent is more than a roof vent; it's also a cool way to ventilate a really fun art project. Los Angeles-based composer, Chad Fischer, built a replica Apollo 11 Space Capsule in his garage during quarantine. This incredibly beautiful and realistic model is now a playhouse for his daughter.

Chad installed the Pop Vent to ensure that his child played in a safe well-ventilated space. He also knowingly chose The Pop Vent because of its aerodynamic shape; he knew it would make for a great looking installation.  

AVP's vents can withstand wind speeds in excess of 200 mph while also keeping out wildlife, insects and rain. As a result, the pop vent will protect the playhouse for years to come. 

To the right, you see images of this one-of-a-kind playhouse as well as part of the assembly process. 

  • Pop Vent installed on Apollo Simulator
  • Pop Vent installed on Apollo Simulator
  • Assembly

The Importance of Installing Roof Vents during the 2021 Winter Season

Proper attic ventilation is important during the winter. Without it, moisture can get trapped in the roofing system which could cause decay of the structure. To achieve proper attic ventilation, you need both exhaust and intake air. This will remove excess moisture from the attic, ultimately lowering energy costs. In addition, the intake air will allow fresh air to circulate the attic.

Every roof should have exhaust vents along the peak and air intake vents towards the bottom. We also have soffit vents for under-eave installation to minimize the look of bulky ventilators.

Without proper ventilation, you may experience a variety of problems with your home:

Elevated energy costs

Prolonged heat causing damage to roof systems

Possible mold, mildew or even dry rot to the attic structure

Damage occurring because trapped water is on the wood deck, rafters and possibly sheetrock below

Condensation will cause rust and corrosion of metal nails, straps and HVAC ducting clamps amongst other things

Having roof vents for air intake and air exhaust can alleviate all of these problems. Roof vents are fairly inexpensive but can have a huge impact on your home. For most people, owning a home is the biggest investment they will make. Therefore, venting your home is not only important, but it also makes your home a healthier place to live.

For over 30 years we have focused our engineering and creative prowess to make the best roof vents possible.

But our heart and passion has always been staying connected to our staff and customers. Helping others and giving back to our local community has always been our greatest accomplishment. 
A variety of exhaust and intake roof vents

Video on Large Gravity Ventilators
AV-30-C12 

Commercial Attic Vents. Featuring a Roof Vent 8 Inches in Diameter for a Flat Roof

Covering the Smallest Static Vents. Both with 3" Diameter, One Vent with a 2" Tall Collar, the other with a 4" Tall Collar

Talking about a 30 inch diameter Commercial Roof Vent
Going over the features of a Vent for Flat Roof Ventilation
Covering the Smallest Roof Vents

In May of 2019, AVP’s president, Martin Kolt, began shooting informational roof vent videos. The goal is to help answer frequently asked questions about roof vents. In addition, these videos also support other technicians out in the field. It’s important that Martin shares his knowledge with AVP’s customers. After all, he has been supporting the roof ventilation industry for over 30 years.

At work, Martin and his team engineer better roof vent designs and also find new and innovative ways to help the end-user. He has discovered ways to manufacture vents more efficiently and safely for his team.

When Martin is not working on roof vent designs, he acts as corporate liaison with Underwriters Laboratories (UL)Texas Department of Insurance, and Florida State. Martin and Ethan plan to release more videos later this year. The goal is to create a video library of valuable information that will be easily accessible. Their videos are available for viewing on AVP’s websiteFacebook and AVP’s YouTube channel.

Smallest Static Roof Vent 
3 inch Round Back Roof Vent

Static Vent 3 inch in diameter

This Round Back Static Roof Vent is 3 inches in diameter and is for a wide variety of applications. Some of which are bathroom fans, plumbing ventilation or range hoods. Shop roof vents at AVP.

AVP has an Array of Roof Vent Sizes to Choose From

Pop Vent - Roof Louver - PV-12-C2

AVP's roof vents vary in size from 3 inches in diameter to 48 inches. While on the other hand, the collar heights range from 1 inch to 12 inches. As a result, ensuring each customer to find a roof vent to fit their home. Some roof types may be EPDM, TPO, PVC, asphalt shingle, cedar shake, slate, or tile. AVP serves the residential, commercial, and industrial roofing sectors.

Largest Gravity Roof Vent
48 inch Aura Ventilator

Gravity Vent

This Aura Gravity Roof Ventilator is 48 inches in diameter. A Roof Vent of this size is for commercial or industrial applications. It is shown here with a curb mount flange to go on top of roof curbs.

Residential Roof Vents

All Gravity Vents, Roof Louvers, Static Vents, Dormer Vents & Keepa Vents are UL Listed, Uphold to CAL FireFlorida State Approved, Texas Department of Insurance Approved & All Support IBC

Exhaust Roof Vents remove hot air from the attic in the summer and moisture from the attic in the winter. Attic Ventilation will extend the life of your roof and can make your home or building more energy efficient. AVP form’s its roof vents out of heavy gauge aluminum so that they can hold up to the toughest weather conditions. Roof Exhaust Vents are manufactured to handle different climate zones. Roof pitch is a factor when deciding which roof vent to purchase.

AVP’s Roof vents have the option of over 40 powder coating colors to choose from. Powder Coating lasts longer than conventional wet paint. How do you powder coat roof vents? First, roof vents get a coating of a special magnetic paint powder. Then the roof vents go into an industrial oven at 400 Degrees Fahrenheit for 15 minutes. The baking process melts the paint powder giving the roof vent a fresh look. Once the roof vent cools, the paint cures and hardens. As a result, this process makes the vents look new for longer versus other painting methods. 

Need more convincing? See AVP's testimonials to see what customers are saying.

Commercial Gravity Ventilators & Industrial Roof Vents

 
Commercial Gravity Ventilator
Commercial Gravity Roof Exhaust Ventilator with Curb Mount Flange on a Roof Curb
7 inch static roof vent

Attic ventilation is important as it can help maintain the health of the building. Removing excess heat in the summer and moisture in the winter will help the life of the roof. As a result, this will also help the functionality and efficiency of the HVAC systems. Flat roofs are anything under a 3/12 pitch. Here at AVP, we design our vents specifically for low slope or flat roofs.

These vents typically have a taller collar and/or come with a curb mount flange for installation on roof curbs. The additional height prevents precipitation from entering inside the vent. In addition, this will protect the attic from moisture. 

Off Ridge Dormer Vents

The Universal Vent is a low-profile off ridge roof vent. It's for a roof pitch of 3/12 slope or greater.
These vents can be both an air intake vent or an air exhaust vent. 

The Dormer vent can be an air intake vent as well as an air exhaust vent. If it's on the upper portion of the roof, this vent can be used as an exhaust vent. This vent will allow heat and moisture to escape. However, when on the lower end of the roof it can be used as an air intake vent similarly to a soffit vent.

The off-ridge roof vent is also excellent for ventilating parapet walls because it will allow the buildup of heat and moisture within the wall to escape. Above all, the Dormer Vent is ideal for proper attic ventilation. 

The 1/8 inch opening between the louvers will keep out precipitation and wildlife while allowing air to move freely. In addition to its functionality, it has a low-profile design. This allows the vent to look pleasing on shingle roofs and parapet walls. Powder coating is available to match the color of your roof.

These vents are UL listed, and meet the standards of the Texas Department of InsuranceFlorida State and have CAL FIRE approval. Need more convincing? See AVP's testimonials to see what customers are saying.

Commercial Roof Louvers & Industrial Roof Vents

Air Intake Roof Vents for Low Slope & Flat Roofs 2:12 and under

Commercial Roof Louver Air Intake For Flat Roof Ventilation
Commercial Roof Louver Air Intake with Curb Mount Flange
7 inch static roof vent

Commercial Attic Vents for Air Intake

In order to exhaust air, you need a fresh air intake. Roof Louvers and Static Vents that intake fresh air to the attic allow exhaust vents to work efficiently. This pressurizes the space so that there is air available to flush out. As a result, excess heat can escape through the exhaust vents. All commercial air intake roof vents have a vertical height requirement for flat roof ventilation.

As a result, AVP's vents can also be made with a curb mount flange. Curb mount flanges are only necessary if going onto roof curbs. Roof vents can be made to connect to a duct with a tailpiece adapter if connecting to a duct system.  Above all, AVP's roof vents have an aluminum construction; therefore they will not rust.

Residential and Commercial Soffit Venting

Soffit Vents
Group of 3 Soffit Vents

AVP's Intake Soffit Vents made are with a Multi Louver Design for optimal fresh air intake.

They are essential for proper attic ventilation. In order to exhaust heat from your roof, you need a soffit vent to bring in the cool dry air. The Under Eave Vent is an air intake roof vent. To clarify, Soffit Vents are roof vents that go underneath the eaves of a roof that extend the warm wall line. When properly combined with other roof ventilation devices, soffit vents allow fresh air to enter into an attic to create proper airflow.

At first, it may seem odd to add insulation for warmth then purposely allow cold air to enter the attic through soffit vents. On the contrary, attic ventilation is the key to an energy-efficient home.

Allowing a natural flow of air to ventilate the attic helps the attic properly ventilated.

As a result, this prevents mold from growing and keeps the insulation dry. In addition to intake air, you will also need to exhaust out the stale air from the attic. See our Exhaust Vents to complete your attic ventilation.

Our all-aluminum Under Eave Vents are corrosion-resistant and easy to install.  All vents are available in a wide variety of colors. The 1/8 inch louvers will prevent rain, snow, insects, and animals from entering inside the vent. As a result, allowing the air to move through the vent without resistance.

Group of soffit vents, width of 10in.

Roof Jacks Vent Caps

For Ventilating a Duct

For duct ventilation, you will need Roof Jack Vent Caps. They allow air to exhaust out without rain, snow, or insects from getting into your home.

The Round Back Roof Jack Vent Cap is for pitched or steep-sloped roofs while the Keepa Roof Jack Vent Cap is for flat or low sloped roofs. Both roof jack vent caps are ideal for ventilating bathroom fans and range hoods. The Roof Jack’s tailpipe is 2 inches long and will fit existing ductwork. As a result, allowing for a quick and easy installation. The inner vertical louvers of the roof jack vent caps not only ventilate your duct effectively but also act as an insect screen. Additionally, having a round design makes the roof jack vent caps aerodynamic; this allows them to deflect wind and objects carried by the wind.

Retrofit (Replacement) Roof Vents, Solar Fans & Vent Pipe Caps

Leave the old roof turbine vent base on the roof & replace it with an easy-to-install vent, attic fan or pipe cap.

AVP's Retrofit Roof Vents & Vent Pipe Caps will fit over an existing roof base. 

It’s a great time to replace your old, noisy roof turbines with one of our roof vents, solar attic fans, or vent pipe caps. AVP's roof vents remove excess heat and moisture from the attic or exhaust pipe. All roof vents and accessories operate silently. As an extra upgrade, have your roof vents match the color of your roof or pipe. Need more convincing? See AVP's testimonials to see what customers are saying.

PVC Pipe Caps & PVC Solar Fans

Gravity Air Exhaust, Air Intake Caps & Solar Powered Exhaust 

Protect your PVC Pipes from the weather

All PVC Vent Caps and Solar Fans can be for both commercial and residential applications. Exhaust caps and solar fans are remarkable for eliminating heat and moisture. While on the other hand, the passive air intake caps allow for fresh air to enter the PVC Pipe. They will continually exhaust air with no moving parts while preventing rain and snow from entering. Additionally, the vertical louvers keep out insects and animals allowing for optimal airflow. To add to to that, the round design is aerodynamic to withstand wind speeds up to 200 mph.

Commercial & Residential Attic Fans

Mechanical Roof Ventilation – For Ventilating Attics, Plenums or Ducts

Roof Mounted Power Attic VentilatorCommercial Attic FanAura Gravity Fan with Curb Mount Flange

Exhaust Attic Fans are designed for efficiency and energy savings year-round.

AVP offers quality attic exhaust fans that provide airflow for optimal ventilation. The fans remove hot humid air during the summer and moist damp air during the winter. As a result, this not only keeps the insulation dry but will lengthen the life of the roof. All fans have vertical louvers that prevent rain and snow from entering. In addition, these louvers also keep out insects and animals. As a result, this keeps the fan clean which allows maximum air exhaustion without resistance. Additionally, this fan has a removable top which makes it easy for maintenance on the unit. The curb mount flange is only for installation on roof curbs.

Residential Solar Roof Exhaust Fans

Solar Powered Fans – For releasing heat in the summer and moisture in the winter

The Round Back Solar Fan uses both solar and wind to power the ventilator. It exhausts air continuously even when there is no sun and the motor is off. It works passively because of the Venturi Effect. To clarify, when the wind blows against the outer louvers this creates an upward draft that allows air to freely flow in and out of the vent. 

This exhaust fan works best if it's near the peak of the roof. It removes hot humid air during the summer and moisture in the winter. This Solar Fan comes in an array of diameters and collar heights allowing for installation in any climate zone. See the Climate Zone Chart to determine the proper collar height for installation in your area.

The 1/8 inch louvers will prevent rain, snow, insects and animals from entering inside the fan.

Commercial Solar Exhaust Fans

Solar Powered Ventilation – For Flat or Low Sloped Roofs Needing Added Ventilation.

The Aura Solar Fan uses both solar and wind to power the ventilator. It exhausts air continuously even when there is no sun and the motor is off. It works passively because of the Venturi Effect. When the wind blows against the outer louvers this creates an upward draft which allows air to freely flow in and out of the vent.

The 1/8 inch louvers will prevent rain, snow, insects and animals from entering inside the fan.

This Solar Fan comes in an array of diameters and collar heights allowing for installation in any climate zone. See the Climate Zone Chart to determine the proper collar height for installation in your area. See AVP's roof curbs to find one to fit your AVP attic fan.

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Active Ventilation Products Inc. (AVP) manufactures Mobile Home Roofing and Whole House Ventilation Products specifically for HUD, FEMA & Modular Home Builders. Dave Carter & Associates, AVP’s National Distributor to the “Housing Industry” has locations all across the country that has been deemed “Essential”.

Why Install Roof Vents? (Frequently Asked Questions)

What is roof or attic ventilation?

The goal of roof ventilation is to provide a means of allowing outside air to enter and exit attics and ventilated spaces, so that heat and moisture can leave the building envelope.

What is a roof vent?

A roof vent is an engineered structure that is typically rigid and has two primary functions. First, to allow air to travel through it. And second, to prevent insects, precipitation and any wind-blown debris from passing through it.

What is a roof vent for?

Roof vents are for the purpose of air intake and air exhaust. Having vents of both types is a requirement by IBC International Building Code for steep slope roofs.

What are intake roof vents?

Air intake vents are used to allow outside air to enter into attics. Intake vents should be located low on the roof, or along the lowest eave or soffit of the roof assembly. Intake vents are best when used in conjunction with roof exhaust vents.

What are the most common types of roof vents?

(Source: NRCA)

Common problems with Soffit Vents


The most popular air intake vent is the Soffit Vent. These vents go underneath the eaves of a roof. This is the area that extends past the warm wall line. When properly combined with other roof ventilation devices, soffit vents allow fresh air to enter the attic. Thus creating proper airflow. However, this runs the risk of obstruction from attic insulation. You can avoid this problem by doing a visual inspection of the attic from the inside.  original image


Another way to avoid an obstruction is to install baffles. Baffles go between rafters keeping insulation from blocking air from the soffit vent below.  original image


Above all, intake vents will complete attic ventilation; In addition to preventing precipitation, animals and insects from entering the attic space.


NRCA does not recommend the use of drip edge vents as intake vents in northern climates where there is a likelihood of ice damming.

(Source: NRCA)

inside an attic pointing out lack of bafflesProperly installed baffles shown in attic

Roof Ventilation for Steep Slope

What is roof ventilation for steep slope?

Proper roof ventilation consists of air intake at low points and air exhaust on the high points of the roof. This design system works off of nature’s thermal dynamic, a process called Diurnal Convection.  original image

(Source: ResearchGate)

Below are some common types of roof exhaust vents:

Roof Vents diagram of Heat and Moisture flow in an attic

Static Vents

AVP's Static Roof Vents are roof vents that do not have moving parts. Therefore, they can be an exhaust vent as well as an intake vent. This will depend on the placement of the vent upon the roof. If the vent is on the upper portion of the roof, it will be an exhaust vent. While on the other hand, if it's on the lower portion of the roof, it would then be an intake vent. AVP's most popular static vents are the gravity vents and the round back vents. Below are pictures of common static roof vents also called passive roof vents and gravity roof vents.  original image 

Turbine Vents

Turbine vents rely on wind to rotate the turbine’s fan blades. The spinning of the blades rotate to keep out rain and snow, not to expedite the ventilation capacity as many people believe. (Source: NRCA)
The typical whirlybird turbine vent will rust and stop working overtime. While on the other hand, our gravity vents continuously work without any moving parts. 
Read our article comparing the typical turbine vent to our Aura Ventilator!

Gravity Vents installed
Aura Gravity Vent with Curb Mount Flange
Aura Gravity vent

Roof Vents designed, engineered and assembled in the U.S.A.

Copyright Active Ventilation Products, Inc. 2021 - All Rights Reserved
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