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1500 CFM Shingle Match Weathered Wood Power Roof Mount Attic Fan with Humidistat/Thermostat

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  • Helps cool attics up 2,800 sq. ft. in size
  • Compact size with hemmed dome for a sleek look
  • High efficiency motor with adjustable thermostat/humidistat
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Product Details

More homes and businesses in the U.S. are protected by a GAF roof than by any other product. We are the leading roofing manufacturer in North America.

Nothing protects quite like a roof.

Nothing protects quite like a roof. That's why millions of Americans live, work, and play under quality products from North America's largest roofing manufacturer - GAF.

Always have a balanced ventilation system. The amount of exhaust ventilation should always be equal the amount of intake ventilation.

How much Ventilation do I need?

Include 1 sq. ft. of attic ventilation, evenly split between intake and exhaust, for every 300 sq. ft. of attic floor space.

Choosing the right attic ventilation for your home is very important. GAF offers a great selection of Master Flow and Cobra products.

What type of Ventilation do I need?

Review the ventilation options below to determine the best fit for your home application.

Available in both roof mount and gable mount, power attic vents exhaust the greatest volume of hot and/or humid air from the attic.

High efficiency Electric, Solar or Hybrid

Quickly removes large volumes of heat and moisture from your attic.

Cooler external air enters through vents lower on the eaves or soffits that “pushes” the hot/moist attic air out of the vents higher on the roof.

No electricity required

Allows excess heat and moisture to escape your attic without the need for electric hook-up.

Wind Turbines utilize the wind to pull heat and moisture from your attic and acts as a static exhaust vent when wind is still.

Wind-powered, smooth, and quiet operation

Utilizes the wind to pull heat and moisture from attic; acts as a static exhaust vent when wind is still.

Located at the lowest part of the roof, intake vents are a critical part of the attic ventilation system, allowing fresh air to flow into the attic

The most overlooked and critical part of attic ventilation

Allows cooler, fresh air to enter the attic at/near the soffits driving heat and moisture out higher exhaust vents.

Your home offers warning signs when your attic isn’t properly ventilated. You may recognize some of these signs in your own home.

5 Warning Signs

Here are some poor attic ventilation warning signs that you may recognize:

A possible cause of higher cooling costs could be insufficient attic ventilation, requiring the cooling system to run excessively.

1. Increased energy costs

Excess attic heat can cause your cooling system to work harder, raising your energy costs.

If you see that your shingles are dry or breaking, that could mean you have inadequate attic ventilation or you may need a new roof

2. Curling/cracking shingles

Inadequate ventilation can cause your roof shingles to curl and crack.

Moisture in the attic can become trapped and condense on rafters and insulation if not insulated properly. This can potentially increase energy costs

3. Roof decking moisture

Excess attic moisture can drip into attic insulation reducing effectiveness, even damaging ceilings below.

Stains or mold growth inside your home may be caused by inadequate attic ventilation. Excessive moisture in the attic allows mold and mildew to thrive

4. Attic mold/mildew

Excessive moisture can cause dangerous mold and mildew causing additional concerns.

Ice damming can cause water to enter the attic and house if you don’t have an adequate shingle underlayment or if the flashing has deteriorated.

5. Winter ice dams

Ice dams can cause expensive leaks and damage in attics, as well as living spaces.

The GAF Master Flow ERV6 Power Roof Vent with built-in humistat/thermostat is a great overall investment in attic ventilation. It can efficiently remove a larger volume of hot and/or humid air from your attic when compared to static ventilation. This in turn can help save money on your heating and cooling costs. The ERV6 model Power Roof Mount Vent can move air at a rate of up to 1500 cu. ft. per-minute. It is designed for attic spaces up to 2800 sq. ft.
  • Energy efficient uses up to 55% less electricity than typical competitor's vents (based on GAF testing at 120-Volt)
  • Helps to reduce energy costs and helps prolong life of the roof and shingles
  • Galvanized steel construction for durability
  • Excellent for roof slopes 3:12 to 12:12
  • Heavy-duty internal screen helps prevent animal infestation
  • UL Listed
  • Miami-Dade County product control approved, State of Florida approved, and meets or exceeds the requirements of Texas Department of Insurance
  • Includes humidistat/thermostat control (not pictured)
  • Return Policy


Dimensions: H 10 in, W 25 in, D 25 in


Coverage Area (Sq.Ft)2800Cut-Out Diameter (in.)15
Net-Free Area (Sq. In.)720Product Depth (in.)25 in
Product Height (in.)10 inProduct Width (in.)25 in
Rough Opening Height (in.)15 inRough Opening Width (in.)15 in


Airflow (CFM)1500Amperage (A)1.65 A
Color FamilyBrownColor/FinishWeathered Wood
Color/Finish FamilyWeatherwoodFeaturesAdjustable Thermostat, Paintable, Wildlife Guard
Horsepower (hp)1/9Intake/ExhaustExhaust
MaterialGalvanized SteelMounting PositionRoof Mount
Power TypeElectric PoweredProduct Weight (lb.)18 lb
Recommended Sq. Ft.2800Returnable90-Day
Ventilation TypeExhaustVoltage (V)120 V
Wattage (watts)127

Warranty / Certifications

Manufacturer Warranty10-Year Limited

Questions & Answers

Q:What size screen cover do I get for this? We're replacing our old one as it started making noise the same day we decided to replace our roof. Figured I'd fix everything while I have guys up there. The current fan has a wire mesh cover, is it needed?
by|Sep 11, 2023
1 Answer
Answer This Question

A:  You do not need to add a screen, The heavy-duty internal screen keeps animals out and helps prevent some insect infiltration. If you have any inquiries about Master Flow products please email MasterFlowTech@gaf.com

by|Sep 13, 2023
    Q:How does the fan work when there is snow on the roof.?
    by|Sep 10, 2023
    2 Answers
    Answer This Question

    A:  You don't want to run this in winter. It's for venting heat and humidity from the attc in summer. We turn ours off when it gets cool probably early/mid-October and don't turn it on again until probably late May in the St Louis area.

    by|Sep 12, 2023

      A:  The fan circulates the moist air out, helping to prevent frost inside the attic and ice dams.

      by|Sep 12, 2023
        Q:I just purchased a master flow 1500 CFM black power roof mount attic fan with humidistat/thermostat, how can I get an operating manual for this unit?
        by|Sep 1, 2023
        1 Answer
        Answer This Question

        A:  Please email Master Flow for more information on your ERV6 at MasterFlowTech@gaf.com.

        by|Sep 5, 2023
          Q:How is the thermostat and humidity controlled? Does it come with remote control that would work from home (or inside the attic only) or an wireless app?
          by|Aug 15, 2023
          1 Answer
          Answer This Question

          A:  The Humidistat/Thermostat (HT1) is a manual controller that has two separate dials to set the desired levels. The WIFI Control Module with QuickConnect Technology for Power Vent is available.

          by|Aug 16, 2023
            Showing 1-4 of 59

            Customer Reviews

            4.6 out of 5
            • 4.6
              out of 112 reviews
            • 88% recommend this product
            Filter by:
            Showing 1-10 of 112 reviews
            Easy to install working and looking good
            Response from Master FlowNov 1, 2023
            Glad you were satisfied with your Master Flow purchase. Thanks for the feedback. MasterFlow
              Arrived ahead of schedule, undamaged. Heavy duty construction, metal dome, uniform color and finish. When installed, asked electrician if the units were operational (purchased two). I could barely hear them running. After two weeks of use, extremely quiet operation (faint hum when running). These replaced 12 year old Broan units that were extremely loud. Very pleased with purchase. Trust this will continue into the future. Only "issue" is that the color of the dome is more "greenish" than "bronze/dark brown" in color than shown in the online image.
              Response from Master FlowOct 11, 2023
              Thank you for the feedback. Glad you were satisfied with your Master Flow purchase and we value your concern. MasterFlow
                I installed 2 units in my house and its amazing, my AC is very happy now, it does not have to work all day long.
                Response from Master FlowOct 5, 2023
                Thanks for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
                  would have given it a five but came with a big scratch on it. Otherwise works fine.
                  Response from Master FlowSep 19, 2023
                  Thank you for the feedback. Glad you were satisfied with your Master Flow purchase and we value your concerns. MasterFlow
                  • Verified Purchase
                  I can feel the difference. One of the best purchases yet.
                  Response from Master FlowAug 17, 2023
                  Glad you were satisfied with your Master Flow purchase. Thanks for the feedback. MasterFlow
                  • Verified Purchase
                  fan made a big difference in attic. Great product. Highly recommended
                  Response from Master FlowAug 10, 2023
                  Thank you for the feedback. Glad you were satisfied with your Master Flow purchase. MasterFlow
                  • Verified Purchase
                  • Verified Purchase
                  • Verified Purchase
                  • Verified Purchase
                  • Verified Purchase
                  Showing 1-10 of 112 reviews

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