Highlights:

• Color: White
• Replaces old-style manual vents
• Fits standard 8" x 16" vent openings
• Automatically opens at 70 degrees Fahrenheit and closes at 40 (approximately)
• The key mechanism, bi-metal coil, fully enclosed in protective cover
• Stainless steel compression spring with 1 adjustable screw for easy installation
• 65 square inch net free area
• High-density thermo-plastic construction
• Stainless steel and corrosion resistant metal parts
• Heavy-duty aluminum mesh screen, front and back
• No electrical hook-up required
• Thermoplastic with automatic damper