Want to find the best Master Flow attic fans?
Master Flow is a brand of attic fans made by the company GAF Materials Corporation.
In this guide, you will learn...
- My #1 top pick for the best Master Flow attic fan
- Things that make Master Flow fans unique
- How to pick the best attic fan
Let's get started.
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Top Pick  | Top Pick | Gable Mount WiFi
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Close Second  | Close Second | Roof Mount WiFi
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 | Solar Powered
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 | Powered Gable
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| View on Amazon | |
 | Powered Roof Mount
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| View on Amazon |
My Overall #1 Rated Pick
Master Flow EGV5SMT Gable Mount WiFi Attic Fan
Updated On May 10, 2022
- Includes thermostat and humidistat for maximum ventilation control
- Control attic fan settings using your WiFi or bluetooth phone/tablet
- Installed vertically on gable vent (easier install without roof hole)
- Made of galvanized steel for a tough build
My overall top pick for the best Master Flow attic fan goes to the certified refurbished smart gable attic fan by GAF. This attic fan is rated at 1450-cfm and for attics up to 2300-sf. The great thing about this fan is that it has a thermostat and a humidstat that can all be controlled using your phone or tablet. It is also made of galvanized steel for a durable finish. The specs from GAF on the new fan can be found here.
Top 5 Best Master Flow Attic Fans
Are you short on time? Check out our top 5 master flow attic fans! Keep reading to see the full reviews of our top picks.
What Are Master Flow Attic Fans?
Master Flow is a brand of products by GAF Materials Corporation that includes attic fans, turbine vents, passive roof vents, and a few other roofing products.
GAF is a leading manufacturer in the world for roofing materials and has over 3,000 employees.
GAF is headquartered in Parsippany, New Jersey, and the company goes all the way back to the early 1900's.
Read Also: What Are The Best Gable Mounted Attic Fans?
Thermostat & Humidistat
One of the unique features of Master Flow attic fans is that many of the fans come with thermostats as well as humidistats.
A thermostat is a device that turns the attic fan on when the attic hits a particular temperature, and turns it off when the temperature drops.
A humidistat acts in the same way but it does it for humidity rather than temperature.
So if you have excess moisture in your attic, or if you are concerned about mold issues --- buying a Master Flow fan with a humidistat is a great idea.
Read Also: What Are The Pros And Cons of Attic Fans?
WiFi Connected
In addition, some Master Flow attic fans have a unique feature in that you can control the fan through your phone or tablet.
All you have to do is download the GAF app to your phone, and you will be able to control the thermostat, humidistat, or even manually turn the fan on & off all through your phone.
Most competing attic fans do not have this special feature.
How Do You Inspect Attic Fans?
#1. Will It Turn On?
Locate the thermostat (small metal box) usually mounted on a rafter or truss next to the fan in the attic. Turn the temperature knob so it is below the current attic temperature. You can also use a heat gun, hair dryer, or lamp to heat up the thermostat if the attic is cold.
#2. Turn The Blades
If the attic fan doesn't turn on, try turning the fan blades. If the blades won't turn, you may have a seized motor.
#3. Operation Quality
If the the attic fan turns on, are their any weird noises? Does it run smoothly? Can you feel air flow or is it very weak? The fan screen or louvers should not be blocked with debris impeding air flow.
#4. Water Stains
A common problem with attic fans are leaks. Are there any signs of water leaks around the fan on the roof sheathing?
What Are The Best Master Flow Attic Fans?
Here are my reviews of the top Master Flow Attic Fans with a brief description and their pros and cons. Check it out below...
Read Also: What Are The Best Roof Mounted Attic Fans?
This certified refurbished Master Flow gable mount attic fan is a quality attic fan that allows you to control the thermostat & humidistat by your phone.
The WiFi enabled attic fan is rated at 1450-cfm so is great for attics up to around 2,300-sf.
Constructed of galvanized steel by GAF, this gable fan is installed on your gable vent in a vertical position --- which is great if you don't want to mess with your roof.
The specs from GAF on the new fan can be found here.
- Powerful 1450-cfm attic fan for larger attics
- WiFi or bluetooth connected
- Includes thermostat and humidistat
- Only install on existing gable vent
- Certified refurbished
- May arrive in generic box
Here is my pick for a refurbished powered roof mounted attic fan by GAF.
This Master Flow attic fan is rated at 1250-cfm and for attics up to 2,200-sf.
The attic fan includes a thermostat and a humidistat for maximum fan control (turn on & off automatically). You can control the temperature and/or humidity from your couch with the GAF phone app.
It is made of galvanized steel and painted black for a durable and sleek look for your roof.
Read the original specs from GAF for new fan here.
- Made of galvanized steel & painted black
- Control thermostat and/or humidistat through your phone
- Rated at 1250-cfm
- Certified refurbish
- May arrive in generic box
This Master Flow solar powered attic fan by GAF is an energy efficient way to increase your attic ventilation.
It is a 1000-cfm fan, and it comes with a PSC (permanent split capacitor) motor and a heavy duty internal screen to help keep out pests.
The body is made out of galvanized steel to withstand the elements and for a long life.
This fan is great to exhaust large amounts of moist air from your attic and to protect your asphalt shingles from heat damage.
Unit is pre-wired.
- 10-watt impact resistant solar panel
- Solar panel can be tilted and moves on a swivel
- 24-volt brushless DC motor for longevity
- May need more than one fan due to low CFM
This is the refurbished non-WiFi gable powered attic fan from GAF Master Flow.
It is rated at 1600-cfm and is suitable for attics up to around 3,000-sf.
Also made of galvanized steel, this attic fan is installed in a vertical orientation on the gable vent.
This gable vent fan is controlled with an adjustable thermostat to automatically turn on & off the fan.
Read the original specs from GAF for new fan here.
- Made of galvanized steel
- Easier install on gable vent
- Rated at 1600-cfm for larger attics
- Certified refurbish
- May arrive in generic box
- No WiFi or bluetooth connectivity
The black powered attic fan is a high quality galvanized steel roof mounted attic fan with the Master Flow brand.
This GAF attic fan is rated at 1500-cfm so it is suitable for attics up to around 2,800-sf.
It comes with an adjustable thermostat and humidistat but it is not WiFi connected.
The attic fan width is 25-inches and the roof hole size is 15-inches.
Read the original specs from GAF for new fan here.
- Made of galvanized steel
- Rated at 1500-cfm for attics up to 2800-sf
- Colored black for a sleek look
- No WiFi or bluetooth connectivity
- Roofer may be required
My Top Pick: Master Flow EGV5SMT Gable Mount WiFi Attic Fan
My overall top pick for the best Master Flow by GAF attic fan goes to the smart gable mount attic fan. Here's why...
#1. Gable Mount
With this attic fan, you can install it in a vertical position at your gable vent. No need to go onto your roof, cut a hole, and possibly create leak issues.
#2. Thermostat & Humidstat
The smart gable attic fan includes a thermostat (temperature) and a humidistat (humidity). Most other attic fans only have a thermostat. The great thing about a humidistat is that it will turn on when humidity rises so you can avoid mold issues and possibly wood rot.
#3. WiFi Connected
The cool thing about this attic fan is that you can control the temperature and/or humidity settings by using the GAF app on your phone or tablet.
Read Also: How To Install An Attic Fan?
