Master Flow 500 CFM Solar Powered Roof Mount Exhaust Fan-PRSOLAR - The Home Depot
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Master Flow


Internet # 100551938

Store SKU # 220825

500 CFM Solar Powered Roof Mount Exhaust Fan

Master Flow 500 CFM Solar Powered Roof Mount Exhaust Fan

This item has been discontinued.
The Home Depot no longer carries this specific product.

$221.00 / each
  • 5 Year Parts Limited Warranty; 2 Year Labor Limited Warranty
  • No wiring required
  • Effectively ventilates up to 500 sq. ft. of attic space



Internet # 100551938

Store SKU # 220825

The Master Flow 500 CFM Solar-Powered Roof-Mount Exhaust Fan will help remove excess heat and moisture from your attic to protect your roofing system from premature deterioration. The Solar Powered fan requires no wiring, uses no electricity, and works with your existing intake vents to help lower the temperature in your attic. The 24 volt DC brushless motor provides airflow up to 500 CFM and requires no maintenance. The impact resistant, 10 watt solar panel has a tilt and swivel design to provide ideal sun exposure. Recommended usage for this unit is one unit per 800 sq. ft. of attic space with a minimum intake ventilation of 240 sq. in. of net free area.

  • No wiring required – uses no electricity
  • Airflow up to 500 CFM
  • Miami-Dade County Approved, Florida Building Code Approved, & Texas Department of Insurance Listed
  • ETL Listed
  • Extra-wide flashing helps prevent leaks
  • Solar powered, operates ONLY in direct sunlight
  • No battery back-up – runs ONLY when panel is in direct sunlight
  • Environmentally friendly operation – Solar!
  • Also available in gable mount version (PGSOLAR)
  • Home Depot Protection Plan:

    Home Depot Protection Plan

Info & Guides

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Assembled Depth (in.) 
30 in 
Assembled Height (in.) 
12 in 
Assembled Width (in.) 
30 in 
Cut-Out Diameter (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Width (in.) 
Color Family 
Color/Finish Family 
Galvanized Steel 
Power Type 
Product Weight (lb.) 
28 lb 
Reccommended Sq. Ft. 
Ventilation Type 
Voltage (volts) 
Wattage (watts) 
Wildlife Guard 
Warranty / Certifications
Manufacturer Warranty 
5 year Parts Limited Warranty; 2 years Labor Limited Warranty 


Rated 3.3 out of 5 by 8 reviewers.
Rated 5.0 out of 5.0 by Works very well and is quiet Puchased this solar fan at Home Depot for $221 and my roofer charged me $100 to install it at the same time they were re-roofing my house. The fan works very well and is extremely quiet. I was surprised at how well it moved out the air in the attic. This fan does not have a thermostat so it will work in both summer and winter which is a good thing as you need air circulation in your attic in winter as well as summer. Make sure you aim the solar panel to the south or southwest as much as possible and this is also noted in the instruction manual. It will work facing east or west but South works best year round especially in winter. I live in Michigan April 29, 2015
Rated 5.0 out of 5.0 by Great product! Good Value! I purchase 2 of these units when I put a new roof on the house. We noticed an improvement the upstairs temperature almost immediately after installing. I expect to see a return on my investment in reduced AC costs. I highly recommend. August 6, 2013
Rated 5.0 out of 5.0 by Solar Fan Depending on the size and volume of the attic, you may need more than one fan. My home is 2400 square feet with corresponding attic size and therefore required 2 such fans. Even at $400 for the both, I believe it was well worth the investment. The fan is quiet, unlike the powered fans, and requires NO electricity. I figure a 2 year payoff at my current utility rates for a home I will live in for the rest of my life makes it a comfortable solution. August 2, 2009
Rated 1.0 out of 5.0 by Solar power fan This fan may work for a very small attic. but don't get your hopes up. I put it up and in the direct sunlight the fan was spinning fast but it did not move very much hot air out of the attic. My attic tempreture only dropped about 10 degrees durring the hottest part of the day. I took it back and bought one of the less expensive powered attic vent fan and it dropped my attic tempreture around 30 to 40 degrees. My attic was getting around 170 to 185 degrees and now it stays around 120 to 130. I would reccomend one of the power ones way before I reccomend the solar fan. June 10, 2009
Rated 5.0 out of 5.0 by Solar Powered Roof Vent Purchased two unit to replace turbine vents..Attic temp down from 170 to 130 at AC now cycles on and off and the whole house stays a lot cooler..easy to install no wires to run deal around.. July 6, 2014
Rated 3.0 out of 5.0 by Going Green With Solar May Not Be The Best Solution... Like many of you reading this, we too thought going solar would be the way to go when adding roof ventilation to our home. While the cost of going solar was nearly 2.5x more expensive than a traditional AC powered system, you do save the on the installation costs. There is no additional wiring required so by the time you pay someone to wire up an AC unit, the total costs are pretty much a wash. Specification-wise: The number of watts used only indicates how much power the unit requires to run, not efficiency of the system. Cubic Feet per Minute (CFM) is the one you want to be concerned with as this number indicates the volume of air the fan with move in One Hour from under your roof or attic area in other words. I found that Solar systems typically are half of what AC units are. So you may need two. Most all of the solar units we saw did not include a thermostat. Why? Then it dawned on me, it’s because they are always running, at least when the sun is bright enough to power them. Since its free energy, who cares right? But here in lies the big problem... What happens on those hot summer nights, especially when the night is still? What happens to all that hot air trapped in your attic? Where is my little solar friend now?!?!... Nowhere, he is sleeping while my attic is being deprived of the night cool air. My guess is that I would be running the AC unit if I had one. At least with an AC unit, I could turn it on and still have roof ventilation to help cool off the house at night. No such luck with solar. Another added bonus of using an AC unit was that I could replace the attic access panel with a louvered unit that I could open and close so that the roof fan could help the draw of cool air into the house at night. In closing, I'm not saying going solar is a bad choice, just maybe not the correct one for your application. We chose hard wiring in an AC unit and just wanted to share our thoughts. July 28, 2013
Rated 1.0 out of 5.0 by bad for garages If you plan to put this unit in your garage roof, DON'T. RF interference from the motor stops remotes from working garage door openers. June 8, 2011
Rated 1.0 out of 5.0 by Don't waste your money This fan comes with a 5 year warranty. In year 6, mine stopped working. Was not powerful enough when it was working. Hold off until they improve solar technology. July 8, 2013
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