Model # PR2DWW

Internet #100073735

Store SKU #108877

Master Flow 1250 CFM Power Roof Mount Vent in Weatherwood
0050206778050

Master Flow

1250 CFM Power Roof Mount Vent in Weatherwood

  • 5 Year Parts Limited Warranty; 3 Year Labor Limited Warranty
  • Adjustable thermostat included
  • Effectively ventilates up to 2400 sq. ft. of attic space
$84.60 /each

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Product Overview

The Master Flow Pro2 Power Roof Vent is a great overall investment in attic ventilation. This Roof Vent removes the greatest volume of hot and/or humid air from your attic, compared to our other models, saving you more in heating and cooling costs. Available in weathered wood.

  • Helps reduce energy costs and helps prolong the life of the roof and shingles
  • Excellent for roof slopes 3:12-12:12
  • Large pre-punched flashing for easier installation and less chance of leaks
  • Blows hot air outside and cools the attic
  • Galvanized steel construction for durability
  • Heavy-duty metal screen deters animals, birds, and insects
  • Miami-Dade county approved and Texas department of insurance listed
  • Optional humidistat available (H1) - sold separately

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Customer Questions & Answers

20 Questions35 Answers

Customer Questions & Answers

1250 CFM Power Roof Mount Vent in Weatherwood
1250 CFM Power Roof Mount Vent in Weatherwood

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4 answers

what is the noise level of the fan ? Please compare it to known sounds like a vacuum cleaner

This question is from 1250 CFM Power Roof Mount Vent in Weatherwood
Asked by
Chicago,Ill
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July 22, 2015
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Answers (4)

Asked by
Tampa, FL
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Home Improvement Profile: DIYer
August 18, 2016
Answer: 
If your ceiling is insulated you should not even know it is on. We have two, one over the dining room and another over the guest bedroom. The only time I hear either is when I am outside and it is quiet.
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Asked by
Florida
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August 3, 2015
Answer: 
The sound is similar to a ceiling fan on high, and that is right next to the fan. At 12' away on my roof I cannot hear it. Inside my house I cannot hear it at all.
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Asked by
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July 30, 2015
Answer: 
The noisy fan is in the attic above my bed... so I am acutely aware of the noise inspite of the fact that I use a breathing device. The noise is heavier than a vacuum cleaner and is a drumming stemming from an out-of-balance fan blade. There is no noise I can compare it to, but it is a heavy drumming noise. Before the roofing material was applied, the fan hopped up and down; I assumed the noise would be Read More
The noisy fan is in the attic above my bed... so I am acutely aware of the noise inspite of the fact that I use a breathing device. The noise is heavier than a vacuum cleaner and is a drumming stemming from an out-of-balance fan blade. There is no noise I can compare it to, but it is a heavy drumming noise. Before the roofing material was applied, the fan hopped up and down; I assumed the noise would be subdued by being fastened to the roof structure more soundly. I was wrong! Read Less
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July 24, 2015
Answer: 
Thank you for contacting Master Flow ... Our fans are very quiet. I would compare it to a refrigerator fan motor in operation.
Please call our Technical Services Group at 800-211-9612 with any additional questions.
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3 answers

Is there an On/Off switch on the fan or thermostat?

This question is from 1250 CFM Power Roof Mount Vent in Weatherwood
Asked by
New York
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June 21, 2016
Should have that switch for safety when working on or near it.
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Asked by
Tampa, FL
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July 1, 2016
Answer: 
I just wired in a HD 20A wall switch before the thermostat for both of mine.
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Asked by
Tampa, FL
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July 1, 2016
Answer: 
Yes, there is a thermostat. I set mine at 90 degrees for here in central Florida use.
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June 24, 2016
Answer: 
No, there is not an Off/On switch included with this product. It is a convenience item, nice to have to save steps when servicing a power fan. Please call Technical Services at 800-211-9612, M-F 8A-5P EDT, for additional information.
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3 answers

Can this fan be wall mounted

This question is from 1250 CFM Power Roof Mount Vent in Weatherwood
Asked by
Longview Washington
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March 30, 2016
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Asked by
Tampa, FL
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July 1, 2016
Answer: 
It is not designed to be wall mounted.
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March 31, 2016
Answer: 
This item is designed to be installed on a shingled roof inside of an unoccupied space (attic). The motor is air-cooled and contains an open spark. Please call Technical Service with any additional questions at 800-211-9612, 8A-5P M-F ET.
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March 30, 2016
Answer: 
This is made to be roof mounted.
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3 answers

does the fan come with a thermostat?

This question is from 1250 CFM Power Roof Mount Vent in Weatherwood
Asked by
quincy , ma.
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September 8, 2015
i thought all roof vent fans came with thermostats.
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Asked by
Tampa, FL
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August 18, 2016
Answer: 
Yes, there is a thermostat. I set ours at 95 degrees for use in Florida.
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September 11, 2015
Answer: 
Yes, this fan comes with a thermostat.
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September 10, 2015
Answer: 
Thank you for contacting MasterFlow ... All MasterFlow Roof or Gable power fans have a thermostat as standard equipment. Please call Technical Services Group at 800-211-9612 with any additional questions.
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Customer Reviews

1250 CFM Power Roof Mount Vent in Weatherwood is rated 4.5 out of 5 by 47.
Rated 1 out of 5 by from Three damage fans I ordered this fan three separate times, all three had significant damage to every part of the fan due to absolutely horrible packaging and rough handling during shipment! The last one I ordered was supposed to be checked for damages prior to shipment and packaged much better than the previous ones but wasn't it was actually worse than the two previous ones
Date published: 2016-08-23
Rated 5 out of 5 by from Awesome product The product was what we ordered, but it was dented in several places and the box looked as if it had been drop kicked repeatedly. The dents were superficial, and the fane works like a charm.
Date published: 2016-07-28
Rated 3 out of 5 by from Attic Fan OK...BUT..... Purchased the PR2D fan 2 years ago and had a roofer install it. Forward to last week, It didn't seem to be working, so I crawled onto the roof to find out why. Long story short...I wanted to remove the set screw first since it would be easier to remove the motor and frame. Not quite...the set screw..4mm is just in the wrong position (at least mine is) for easy access..Looking at it as installed, it should be located about 3/8--1/2" to the right which would make it very easy to loosen and tighten. I challenge anyone from the factory to easily remove the set screw as positioned. As it is, one needs a very long 4mm or 5/32 flat blade screwdriver to access that screw thru the mesh. A 4mm hex head socket won't work, too fat. I found a red handled t-handle hex key 5/32" at ACE Hardware that works quite well in loosening the set screw. Also, the stainless steel mesh around the unit has the small protrusions that will scrap one's arm while working on the unit. These small nubs should be ground down at the factory, they're a nuisance. The fan works great, but working on it can be a pain. Oh and the paint on top of the cover is flaking off after only 2 years...
Date published: 2016-08-10
Rated 5 out of 5 by from perfect replacement and more efficient than older version perfect replacement and more efficient than older version
Date published: 2016-12-13
Rated 5 out of 5 by from Easy install, works as expected Easy install, works as expected
Date published: 2016-12-09
Rated 5 out of 5 by from So far, So good Just took the fan out of the box for some preliminary testing. Here are my thoughts so far: Well built unit, heavy gauge steel for dome and "duct". Assembled with bolts, not sheet metal screws. Dome supports heavy duty. Fan blade is "3 wing" type with the blades riveted to the hub. Much better design than the 6 blade stamped steel fan used on cheaper models. Fan runs quiet with decent airflow. Electrically the fan uses the PVM105 1/7hp motor. Motor is rated at 1050rpm/1.9amps. Motor is heavy duty PSC design with a 10uf capacitor. PSC motor designs are much more efficient than the cheaper "shaded pole" motors. I hooked it up to a "kill-a-watt" and the Motor Amps read 1.51A, Wattage 163W, Power Factor .88. Power use for a month based on 10hr per day run time would be 50kwh/month. If you pay 10 cents per KWH it cost about $5/mo to run the fan. IMHO the extra $15 over the entry level fan is well worth it. In addition to the better fan blade/motor you also get a paint job. I'll write another review once the unit is actually installed on the roof.
Date published: 2011-07-23
Rated 5 out of 5 by from This Fan Rocks! This was a piece of cake to install. I removed an old heat vent from the roof and cut the existing hole with a jigsaw about 1.5 inches larger. I slid the unit under the shingles, nailed it down and used plastic roof cement as instructed. The electrical hook up was easy as I tied into an existing circuit found in the attic and tied into it using 20 amp wire, staples and a new j-box with switch. This fan has cut my run time on my 5T unit by 25%. I set the t-stat @ 80deg for now as I want the attic to cool at least this low. I'll re-adjust to 95 in July sometime. Great product, low electrical usage and BIG savings on my HVAC usage.
Date published: 2014-06-10
Rated 5 out of 5 by from Cool running :) I hadn't installed a roof mount in 40 years so I was nervous but all went GREAT. The heat that came out once I punched the hole was like putting your head in a hot oven. Instructions were simple, it's all about organizing your work. I have very sensitive hearing and it took a very quiet room and concentration to hear the fan from inside the house. We love it and notice the considerable difference in our home temperature. PS I watched a couple YouTube videos to help with confidence on installation.
Date published: 2015-08-04
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