---
title: HEHC Kits - Furnace Filter Whistle
---

<https://hehc.duke-energy.com/furnace-filter-whistle#mainContent>

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# **Furnace Filter Whistle**

![N9150-Furnace-Filter-Whistle-3](https://hehc.duke-energy.com/hs-fs/hubfs/N9150-Furnace-Filter-Whistle-3.jpg?width=500&height=500&name=N9150-Furnace-Filter-Whistle-3.jpg)

 

### Overview

Our furnace filter whistle easily attaches to a new furnace filter and sounds when your filter becomes 50% clogged, letting you know when it is time to replace the filter. Having a cleaner furnace filter can help a furnace be more energy efficient.

### Benefits

- Whistle alerts you to change filter
- Reusable
- Helps improve HVAC efficiency
- Fits all 1” filters
- Easy to install

[Materials And Tools](https://hehc.duke-energy.com/furnace-filter-whistle#tab-1) [Installation Instructions](https://hehc.duke-energy.com/furnace-filter-whistle#tab-2)

| ![N9150-Furnace-Filter-Whistle-3](https://hehc.duke-energy.com/hs-fs/hubfs/N9150-Furnace-Filter-Whistle-3.jpg?width=200&height=200&name=N9150-Furnace-Filter-Whistle-3.jpg) Furnace Filter Whistle |
| --- |

####   1. Locate and remove your HVAC system’s filter.

#### 2. Prepare to Install

Your filter whistle comes in two pieces: a “base” and a “hat.” Make sure that the base is on the incoming airflow side and that the hat is on the opposite side, where the air exits the filter.

#### 3. Install the whistle

Align the two pieces on their appropriate sides of the filter and press them together through the filter until they click into place.

#### 4. Reinstall the HVAC filter

Reinstall the filter in your HVAC system. The whistle will sound when the filter has become 50% clogged. Be sure to replace the whistle each time you change the filter.

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