Product Brochure
30
Foundation Ventilation
Foundation Vents
Master Flow
®
 Foundation Vents 
help to remove damaging  
moisture, which can lead to 
mold growth and structural  
decay in the foundation area  
of the home. They can even help  
lower the risk of frozen pipes  
by providing ventilation in the 
crawl space area.
•
Removes damaging moisture – helps prevent structural decay 
and mold growth
•
  Fits in traditional foundation vent openings, with simple 
plug-and-go operation
•  Powered operation helps to reduce increased volumes of moisture 
during peak times
• 
 Automatically opens at 70°F, closes at 40°F
• 
Helps prevent foundation decay
• 
Lowers risk of frozen pipes
• 
Replaces manual vent
• 
Snap-in installation
Power Foundation Vent
PFV1
Automatic Foundation Vent
FVRABL










