Reintroducing WhisperGreen® Select™, our whole house IAQ solution with enhancements that will provide greater value to our customers. First, our improved single-hinged Flex-Z Fast™ bracket for more flexible, fast and easy installation. Other enhancements include a new elegant grille design, an environmentally friendly 26 ga Zinc-Aluminum-Magnesium (ZAM) housing design and dual access junction box that helps simplify wiring in tight spaces.