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Surface Mount Solar Powered Attic Ventilators

Broan® 537 CFM Solar Powered Attic and Garage Ventilation Fan, Surface Mount, Black

Prevent heat and moisture build-up with the Broan® 345SOBK Solar Powered Attic and Garage Ventilation Fan. Attics can reach over 150°F in summer, warming your living area, increasing the air-conditioning load and your energy bill. In winter, ice dams can form, and moist air can condense causing mildew, rotting wood and wet insulation. Year-round attic ventilation ensures a cooler, drier attic which can extend the life of your roof and air conditioner, while lowering air conditioning expense. Besides the attic, this ventilation fan is also designed for one and two car garages. Say goodbye to unbearable heat, humidity and unwanted smells that accumulate in the garage. The Broan® 345SOBK Solar Powered Attic/Garage Ventilation Fan uses energy from the sun to operate and requires no additional electricity, which means you save up to $180 per year that you might pay to operate an electric powered attic and garage ventilation fan, depending on your local electric rates, size of attic, climate, etc... Plus, you can save even more with a 22% Federal Tax Credit on both the purchase price and installation costs of your Solar Powered Attic/Garage Ventilation Fan. Because these solar ventilation fans operate without fuel, waste, or pollution, they earn points towards Green building. So you can save money on electricity without using any to do it, which is green for the environment, and puts some extra green in your wallet. For most roofs, our one piece Solar Powered Attic Ventilator is the perfect solution. Because our solar cells are highly efficient at capturing the sun’s energy, there is no need for unsightly raised panels or tracking systems. Instead, what you see is a low profile ventilator in a contoured design that integrates well with the roof.




  • Prevent heat and moisture build-up for a cooler, drier attic which can extend the life of your roof and air conditioner, while lowering air conditioning expense.
  • Fight heat, humidity buildup and unwanted smells inside the garage
  • Effectively ventilate a one car garage, either attached or detached from the home
  • 28-watt solar panel captures sunlight from dawn to dusk and efficiently converts it into electric power to keep your attic cool and dry all day long, providing 537 Maximum CFM and year round protection for the structure of your home
  • 12” diameter, one-piece aluminum 5-blade fan is pitched for maximum air flow to keep your living area cooler, extend the life of your air conditioner and save energy and money
  • Compact base footprint means fewer shingles to cut for easier, faster installation
  • Low profile, integrated design for an attractive, unobtrusive addition to your roof without the need for props or pivoting stands used by some manufacturers
  • Rugged, tempered glass solar panel withstands large hail and won’t delaminate so you can be confident in its reliability, functionality and attractive appearance
  • Housing is a molded design of UV-stabilized, color-dyed, rugged ABS plastic that withstands hail and resists fading to remain attractive for years
  • Housing frame features positive stops to “seat” the dome for fast, easy installation
  • Direct-current, variable voltage motor is dynamically balanced for superior performance and silent operation for years of worry-free operation
  • Includes stainless steel fasteners and galvanized steel brackets for durability and corrosion resistance
  • Optional Broan CWT45 thermostat (sold separately) is easy to install and disables the motor when the temperature dips below 50-degrees, to extend motor life; recommended for climates where cold weather condensation isn’t a concern
  • 重测量铝屏幕保持昆虫,animals or birds without impeding airflow
  • 额定的阁楼3200立方英尺
  • Tested and approved for extreme hot and cold weather
  • Specs
  • Downloads
  • Videos


Automatic Shutoff No
Built-In Timer No
cUL Listed No
Dome Material ABS
ENERGY STAR® certified No
ETL Listed No
Fan Blade 5 Blade Aluminum
HVI Certified No
Insect/Critter Screen Yes
Installation Type Surface Mount
UL Listed No
CFM 537
Dome Dimensions 26-5/8" x 29-7/8"
Dome Height From Roof 9
Power Type Solar
Roof Opening - Width 14" Diameter
Solar Panel Makeup Polycrystalline Silicon
Solar Panel Watts 28
Sound Level (Sones) 0
Housing Dimensions 25-1/2" x 25-1/2"
Motor 直流Variable Voltage
Manufacturer Warranty 1 Year
Motor Engineered For Continuous Operation No
High Efficiency Luminaire No
Solar Powered Attic Exhaust Fans - Danny Lipford
Solar Options For Your Attic Ventilation
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