Active Ventilation Products Inc. and GAF each sell roof ventilation systems on their respective websites. Each site offers several products for residential use to improve the efficiency of attic insulation.
Active Ventilation Products offers several whole-house and attic ventilation system options. The company's whole-house systems include a passive variety that uses wind to produce exhaust, and it also offers a solar and wind combination system.
The GAF website lists several roof ventilation products that ensure continual air flow through the attic, as required by federal regulations. Products include attic exhaust vents and options for homes with and without soffits, including choices for both cold and warm climates.