Product Description 
Reduce energy costs with our air filter replacement alert. Dirty air filters force the blower in heating and cooling systems to overwork, raising energy costs.
- They emit a whistle when dirt builds up in the filter, signaling that it is time to change it for maximum energy efficiency.
- Attaches to all 1" filters
- 2 position flap allows whistle to work with both fiber and pleated filters
- gradually notifies you when it is time to change your air filter
Vendor: Practecol
Please Note: Prices, promotions, styles and availability may vary by store and online. While we do our best to provide accurate item availability information, we cannot guarantee in-stock status and availability as item quantities are constantly changing throughout the day. Inventory last updated 5/22/2013 at 5:00am CT. Rebates are an in-store service; therefore online purchases do not qualify towards rebate redemption.
