Home ventilation is one of the most important things you can manage in order to maintain a healthy environment for you and your loved ones. The air in your home is used many times over, often with fresh air entering only when we open doors or windows. One way to improve the air quality of the home is through whole-house ventilation with a Panasonic WhisperLine fan which removes stale air and provides fresh air on a slow, continuous basis. Panasonic also carries accessories for their WhisperLine series. The Panasonic PC-NLF06D WhisperLine Accessory Kit is a double pick up kit that includes two 6-Inch double inlet grilles, two back draft dampers, two clamps, zip ties, and a 6- to 6-Inch Y-adapter. The sturdy metal grilles are slotted with a beveled edge and white finish. Constructed of 24-30 gauge aluminum, this kit is compatible with the Panasonic FV-20NLF1 WhisperLine 240 CFM and FV-30NLF1 WhisperLine 340 CFM In-Line Fans and the FV-NLF06G WhisperLine 6-Inch Duct Inlet Grille. The Panasonic PC-NLF06D WhisperLine Accessory Kit is covered by a manufacturer warranty for period of three years from the date of the original purchase and is sold one item per package.