Nu-Calgon 4940-31 - PermaFilter 20" X 20" X 2" Each
Nu-Calgon 4940-31 – PermaFilter 20" × 20" × 2" (Each)
Description:
The Nu-Calgon 4940-31 PermaFilter is a high-efficiency permanent air filter designed for long-term performance and reduced maintenance. Measuring 20" × 20" × 2", it replaces standard disposable filters while providing superior filtration for HVAC systems. Its washable aluminum frame and electrostatic media trap airborne particles such as dust, pollen, and lint—helping maintain cleaner indoor air and improving system efficiency. Ideal for residential, light commercial, and HVAC service applications, PermaFilter units are reusable and environmentally friendly, saving costs over time.
Key Features:
- Permanent, reusable filter—simply wash and reinstall
- Durable aluminum construction with electrostatic media
- Helps maintain airflow and reduce strain on HVAC systems
- Designed for residential and light commercial use
- Fits standard 20" × 20" × 2" filter slots
Specifications:
- Brand: Nu-Calgon
- Part Number: 4940-31
- Product Name: PermaFilter 20" × 20" × 2"
- Material: Aluminum frame, electrostatic media
- Nominal Size: 20" × 20" × 2"
- Weight: Approx. 2.2 lbs
- Type: Washable permanent air filter
- Country of Origin: USA
Applications:
- Residential HVAC systems
- Commercial rooftop units
- Air handlers and furnaces
- Ideal for improving indoor air quality
| Package Quantity | 1 Item |
|---|---|
| Item Returns | Sorry, the item can't be returned |
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