Internet #205924928

Model #ERV4M

Store SKU #1001332799

1000 CFM Mill Power Roof Mount Attic Fan

  • Helps cool attics up to 1,600 sq. ft. in size
  • Compact size with hemmed dome for a sleek look
  • High efficiency motor with adjustable thermostat
  • See More Details

Frequently Bought Together

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Price:
$7800

Product Overview

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 ERV4 Power Roof Vent is a great overall investment in attic ventilation. It can quickly 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 ERV4 model Power Roof Mount Vent can move air at a rate of up to 1000 cu. ft. per minute. It is designed for attic spaces up to 1600 sq. ft.
  • Energy efficient uses up to 55% less electricity than typical competitor's vents (based on GAF testing at 120-Volt)
  • Helps reduce energy costs and helps prolong the 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
  • Optional humidistat available (H1) - sold separately

Info & Guides

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

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1000 CFM Mill Power Roof Mount Attic Fan
1250 CFM Power Roof Mount Vent in Brown1080 CFM Weathered Grey Galvanized Steel Electric Power Attic Roof Ventilator
BrandActive VentilationMaster FlowMaster FlowMaxx Air
Name365 CFM Brown Powder Coated 5-Watt Solar Powered Roof Mounted Exhaust Attic Fan1000 CFM Mill Power Roof Mount Attic Fan1250 CFM Power Roof Mount Vent in Brown1080 CFM Weathered Grey Galvanized Steel Electric Power Attic Roof Ventilator
Price
$5396
$7800
$9630
$9699
Ratings
(259)
(126)
(6)
(79)
Power TypeSolar PoweredElectric PoweredElectric PoweredElectric Powered
FeaturesCorrosion Resistant,Weather Resistant,Wildlife GuardBuilt-in Screen,Thermostat ControlledAdjustable Thermostat,Built-in ScreenAdjustable Thermostat,Built-in Screen,Built-in Thermostat,Thermostat Controlled,Wildlife Guard
Rough Opening Width (In.)8151514.5 in
Wattage (watts)5160108Not Measured
Intake/ExhaustExhaustExhaustExhaustExhaust
Mounting PositionRoof MountRoof MountRoof MountRoof Mount
Ventilation TypeExhaustRoofRoofRoof
Rough Opening Height (In.)8151514.5 in
View ProductView ProductView ProductView Product

Specifications

Dimensions

Coverage Area (Sq.Ft)
480
Cut-Out Diameter (in.)
15
Net-Free Area (Sq. In.)
480
Product Depth (in.)
25
Product Height (in.)
9
Product Width (in.)
25
Rough Opening Height (In.)
15
Rough Opening Width (In.)
15

Details

Airflow (CFM)
1000
Amperage (amps)
1.35
Color Family
Silver
Color/Finish
Silver
Color/Finish Family
Silver
Features
Built-in Screen,Thermostat Controlled
Horsepower (hp)
1/12
Intake/Exhaust
Exhaust
Material
Galvanized Steel
Mounting Position
Roof Mount
Power Type
Electric Powered
Product Weight (lb.)
17
Recommended Sq. Ft.
1600
Returnable
180-Day
Ventilation Type
Roof
Voltage (volts)
120
Voltage (volts)
120
Wattage (watts)
160

Warranty / Certifications

Manufacturer Warranty
5-year Limited Parts/2-year Labor Warranty

Questions & Answers

50Questions12Answers

Can the motor be replaced without disturbing the attachment to the roof?

Asked by johnk February 24, 2021
1
Answer

Yes, the PVM105 replacement motor has a video showing how to replace the motor. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

Can I have the measurements of the motor

Asked by Clueless August 13, 2020
1
Answer

The overall height of the motor is approximately 5 3/4 inches , If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

Can these be left to run 24/7? What is their normal duty cycle?

Asked by Ken August 4, 2020
1
Answer

This is designed to run off a temperature control, it is not designed to run 24/7. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

What is the power source,,,a/c from house or solar?

Asked by Ray August 1, 2020
2
Answers

I got the one powered by electricity. I don't have good sun hitting the roof to get a solar powered one.

Does the UP arrow have to point up hill?

Asked by Sean July 12, 2020
2
Answers

With the arrow pointed up it is easier to mount the thermostat in the attic. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

Can I add a rheostat to this fan?

Asked by Matt January 20, 2020
1
Answer

No, this is a single speed motor. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

Can I have this fan installed by home depot?

Asked by Wilbert September 25, 2019
1
Answer

Hi Wilbert, Thank you for your recent inquiry with The Home Depot. The price is $78.00 Unfortunately we do not install. We appreciate your business and look forward to serving you in the future.

When I power the fan on, it trips the 15 amp breaker.

Asked by Mark August 25, 2019
1
Answer

Did it trip the breaker with original thermostat? Please call Technical Services at 800-211-9612 for help with your situation.

When it rains heavy, water is getting through mesh wiring and dripping into my attic from the blade. Any way to prevent

Asked by Ron August 7, 2019
1
Answer

Please call Technical Services at 800-211-9612 for help with your current situation.

Can you use a speed controller with this fan?

Asked by Secure8 July 30, 2019
1
Answer

No, all Master Flow Attic Fans and Motors are single speed. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

1000 CFM Mill Power Roof Mount Attic Fan - page 2

Customer Reviews

  • 4.5
    out of 126 reviews
  • 93% recommend this product
5star-icon81
4star-icon34
3star-icon5
2star-icon1
1star-icon5
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Showing 1-10 of 126 reviews
I bought this unit to replace the old one which lasted about 10 years built with the home. This n...
I bought this unit to replace the old one which lasted about 10 years built with the home. This new one lasted less that 2 years and started squealing a LOT. Neighbors noticed how loud it was so time to replace it again. Really with it would have lasted a bit longer.
by cme4tv
2 people found this helpful
I bought this fan about 2 years ago and installed it back in winter in 2016. It was too hot i the...
I bought this fan about 2 years ago and installed it back in winter in 2016. It was too hot i the attic to do it in summer. When me and my wife moved into our new house, I put the remote thermostat in the attic. The house was newly built, and had attic insulation "blown" in. It was really good at holding in heat during winter and keeping the attic somewhat cool. The house we were renting was old, had worn down and flattened "Pink Panther" insulation. It was horrible. Our electric bills were about $200 a month during summer when we lived there. I put in a gable mounted fan, and it dropped our bills down to about $125-150, so a significant drop in costs. Having seen for herself the benefits of a attic fan, she allowed me to cut a hole in our new home to install this one. Even though the house was new, and had great insulation, this fan still helped to keep the heat to a minimum. I spray painted the aluminum cover with a galvanizing spray, then with Rustoleum brown, to match the house color. During summer, we keep the AC set at 75 when were gone (we both work), and drop it to 72 when we get home. After 10pm, we drop it to 69, because we sleep better when its cold. We use Green Mountain Energy as our provider, and they give us a decent rate. Our Electric bills are as follows: March: $68.74 April: $79.07 May: $123.76 Projected Cost For June (AS of this writing. I still have 2 weeks to go) $143.50 I anticipate a higher bill for June, as my wife took a week off from work and stayed home during the week. I'm sure it would have been lower had she gone to work. I also did an experiment last week. I shut off the fan from the power source for 2 days, so i could record the temps in the attic. I've also included 2 pictures of the before and after. The BEFORE (shutting off the fan) picture shows the highest temp in 48 hours was 135 degrees. The AFTER (turning the fan back on) picture shows that the highest temp in the attic was 101 degrees. Also, when the AC runs, since it doesn't have to overcome such a high temp in the attic, the house cools down significantly faster, which means less cycling of the outside unit, which means less energy used. As far as i'm concerned, this is a MUST HAVE for anyone in the Houston and surrounding areas. The cost of savings far outweigh the cost of installing this fan.
by levithan9
12 people found this helpful
by HomeDepotCustomer
Not as loud as I thought...
Not as loud as I thought
by KRISTOPHER
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
by David
1 person found this helpful
Manufacturer's defect made one of the fans unusable. The blades...
Manufacturer's defect made one of the fans unusable. The blades hit one side of the cylinder
by HomeDepotCustomer
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
Rating provided by a verified purchaser...
Rating provided by a verified purchaser
by HomeDepotCustomer
1 person found this helpful
It just a roof vent hope motor last have not...
It just a roof vent hope motor last have not had much luck with the motors lasting
by BOBBY
Showing 1-10 of 126 reviews