Air Furnace Filter Alarm Whistle Bulk Pack

Know when to change your filter, know when to start saving.  Our Air Filter Whistle lets you know when it's time to change your heating and air conditioning filter. If you change your air filter regularly, you reduce the risk of breathing unhealthy air and prevent your heating and cooling system from running harder than necessary. In addition to reducing your energy costs, changing the filters can extend the life of your heating and cooling units and keep them operating properly.   The Furnace filter alarm whistle includes - 2 parts - the flat base and the hat - (image shows both sides).  As dirt builds up, it produces an increase in pressure, which triggers the whistle.

Features 

• Winterize your home
• Save energy
• Stay alert when filter needs changing
• Comes with a hat and flat parts and instructions
• Made in the U.S.A

Specifications 

• Includes two parts - the base and the hat 
• Increase in air pressure from dirt build up triggers a whistle 
• Approximately 2" in diameter.  Hat is approximately 1" tall 

Instructions:

1. Line up the two pieces of the Air Filter Whistle on the front and back of the filter.

2. Filter must be in between the two pieces of the Air Filter Whistle.

3. Press the pieces together, pushing through the filter until you hear the two pieces of the Air Filter Whistle click into place. Install your air filter as usual.

Easy to install, inexpensive and reusable. Made from durable plastic. Each disk measures approximately 1 3/4" " in diameter. Efficient in heating and air conditioning. Complete with instructions.