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 Brown1500 CFM Shingle Match Weathered Wood Power Roof Mount Attic Fan
BrandActive VentilationMaster FlowMaster FlowMaster Flow
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 Brown1500 CFM Shingle Match Weathered Wood Power Roof Mount Attic Fan
Price
$5396
$7800
$9630
$12400
Ratings
(257)
(124)
(5)
(206)
Power TypeSolar PoweredElectric PoweredElectric PoweredElectric Powered
FeaturesCorrosion Resistant,Weather Resistant,Wildlife GuardBuilt-in Screen,Thermostat ControlledAdjustable Thermostat,Built-in ScreenAdjustable Thermostat,Built-in Screen,Paintable
Intake/ExhaustExhaustExhaustExhaustExhaust
Ventilation TypeExhaustRoofRoofRoof
MaterialAluminumGalvanized SteelGalvanized SteelGalvanized Steel
Rough Opening Width (In.)8151515
Rough Opening Height (In.)8151515
Mounting PositionRoof MountRoof MountRoof MountRoof Mount
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

49Questions32Answers

Is the animal guard metal or plastic? Thanks

Asked by DMU September 9, 2018
5
Answers

Mine was metal

Does this unit have louvers?

Asked by cvs March 25, 2018
4
Answers

No, this unit does not have louvers.

how many volts work

Asked by mark June 25, 2017
3
Answers

120 Volts and 145 Watts. So in 6.8 hours, you will use 1 kWh which costs between 10-20 cents on average.

Does this include a thermostat?

Asked by timo July 25, 2015
3
Answers

1000 CFM Mill Power Roof Mount Attic Fan 4.4 out of 5 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

My thermostat has a white wire and a black wire for power supply hook up, but what are the two wi...

Asked by Neil March 24, 2019
3
Answers

Yes, just tuck those back into the box. That is the connection between the thermostat and the fan motor. If you want to get fancy, you can use a 3 conductor wire and a switch to connect in with that pigtail to bypass the thermostat. That way, if the switch is off, the fan come on as the thermostat requires, but if the switch is on then the fan runs continuously. note, there is also a green screw in the thermostat box for your ground wire connection.

What is the noise level? It will mounted over the bedrooms.

Asked by Shevawn March 23, 2016
3
Answers

Just installed one over my bedroom and it is much quieter than I thought it would be, noise is not a problem.

Could this be installed on an outside wall of a 14 x 23 pool room? If not, do you have a product that could?

Asked by Swimmer June 22, 2018
3
Answers

You should I have mine wall mounted on my garage and it does fine. No water gets in

Why does it have to be located 24" below the ridge. I would like to install in a storage shed clo...

Asked by Arrie August 10, 2018
3
Answers

In most cases it gives protection from wind driven rain. This fan helps cool attics up to 1,600 sq. ft. in size and requires 480 Sq. Inches of NFA intake. I would not recommend this for a storage shed. If you have any other inquiries about our Master Flow products please call Technical Services at 800-211-9612.

Is there a minimum air space need?

Asked by Zack May 22, 2018
3
Answers

This should help with that. It should move all the air you need. I would recommend it.

Can this fan be installed on a flat roof.

Asked by Martin June 30, 2018
2
Answers

No, these are not for use on flat roofs. For roof slopes 3:12-12:12. 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

  • 124 Customer Reviews
  • 4.5 out of 5 stars overall
93% of customers recommended.
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I bought this unit to replace the old one which lasted about 10 years built with the home. This n...
Quality :
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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.
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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.
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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
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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
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Moves good air volume. A bit more vibration than...
Moves good air volume. A bit more vibration than I like.
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I have vaulted ceilings and hot air gets trapped. Just one of these acts like a whole house fan. ...
I have vaulted ceilings and hot air gets trapped. Just one of these acts like a whole house fan. With 2x6 construction, r19 and r30 plus an attic fan we don't need ac. Very green option!
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