Automatic Damper for Turbine Ventilator

Automatic Damper for Turbine VentilatorSlash home heating cost today. It's so easy. Cuts turbine winter heat loss by 80%. Roof turbines are great in summer. But, suck warmth from your rooms in winter. Never cover turbine with a bag. A roof fall is very dangerous. See 1 Min. Video. Louvers: OPEN in summer (70F) CLOSE in winter(40F) Powered by temperature (needs no batteries) U. S. Patent; new energy saver Winterize your home quick, install: 1 unit 30 min. 3 units 60 min Fits into new or old

Slash home heating cost today. It's so easy. Cuts turbine winter heat loss by 80%. Roof turbines are great in summer. But, suck warmth from your rooms in winter. Never cover turbine with a bag. A roof fall is very dangerous. See 1-Min. Video.

Features

Item Weight	.7
Product Weight (lb.)	1
Bracing	Internally Braced
Color Family	Gray
Intake/Exhaust	Exhaust
Screen Included	No
Power Type	Wind Powered
Returnable	180-Day
Material	Plastic
Color/Finish	Gray
Paintable/Stainable	No
Shape	Round
Features	Automatic Shutter,Built-in Thermostat,Corrosion Resistant,Thermostat Controlled,UV Resistant
Mounting Position	Roof Mount
UV Resistant	Yes
Product Width x Depth	11.7 in. x 2.2 in.
Rough Opening Width (In.)	11.7
Net-Free Area (Sq. In.)	78
Product Width (in.)	11.7
Product Height (in.)	11.7
Rough Opening Height (In.)	2
Cut-Out Width (in.)	2.2 in
Product Depth (in.)	2.2
Coverage Area (Sq.Ft)	2000
Manufacturer Warranty	25-year factory replacement of thermostatic controller as needed. This is the drive mechanism.