Nu-Calgon 4940-08 - PermaFilter 14" X 20" X 1" Each
Nu-Calgon 4940-08 PermaFilter 14″ × 20″ × 1″ – Permanent Electrostatic Air Filter (MERV 8, Metal Frame)
Product Overview
Upgrade your HVAC system with the Nu-Calgon PermaFilter 4940-08 — a premium, permanent electrostatic air filter engineered for repeated use in residential or light-commercial air handler applications. With exact dimensions of 14″ (L) × 20″ (W) × 1″ (D), and built with a rugged 1″ metal frame, this filter delivers dependable performance and long-term value.
Key Features & Benefits
- Permanent, reusable design – No replacement filter required. The electrostatically charged filter medium uses a static-prone fiber maze to attract and capture airborne particles, then can be washed and reused.
- MERV 8 rated – Tested to ASHRAE standards and rated to meet MERV 8 specifications for particulate removal.
- Metal frame construction – The 1″ metal frame ensures structural durability and standard fit in 1-inch filter slots.
- Efficient airflow & high dust-holding capacity – The electrostatic medium allows better airflow compared with many disposable filters, reducing strain on the HVAC system.
- Eco-friendly & cost-effective – By being washable and reusable, it reduces ongoing replacement costs and landfill waste compared to disposable filters.
- Lifetime limited warranty – For as long as the filter remains installed in the original system and maintained per instructions.
Specifications
- Part Number: 4940-08
- Frame: 1″ metal frame
- Filter Efficiency: MERV 8 rating
- Airflow Resistance: Initial resistance ~0.20 in W.C. at 1180 CFM; Final resistance ~1.50 in W.C. at 1180 CFM.
- Cleaning Interval: Recommended every 8-12 weeks under normal residential conditions.
- Warranty: Lifetime limited warranty.
Ideal Applications
- Residential or light-commercial HVAC systems with standard 14″ × 20″ × 1″ filter slots.
- Systems where reducing ongoing filter cost and waste is a priority.
- Environments where moderate efficiency (MERV 8) filtration is sufficient to control dust, pollen and pet dander.
- HVAC contractors and facility managers specifying durable reusable filters.
Installation & Maintenance Tips
- Measure the return-air grille or filter compartment to ensure compatibility with the exact size of 14″ × 20″ × 1″ (actual, not nominal).
- Check airflow direction arrow on the filter frame; install so the arrow points in the direction of system airflow.
- Flush & rinse: Every 8-12 weeks, remove the filter, rinse from the clean-air side opposite airflow direction, then allow to air dry.
- For enhanced odor or microbial control: After drying, apply a compatible antimicrobial/odor-control spray if required.
- Monitor system performance periodically—excessive dirt build-up can raise resistance and impair system efficiency.
Why Choose This Filter?
The Nu-Calgon PermaFilter (part 4940-08) offers a smart, sustainable alternative to one-time disposable filters. By combining a durable metal-framed, electrostatically charged reusable medium with a lifetime warranty, it provides long-term value, improved indoor air filtration, and reduced waste. Ideal for homes or smaller commercial settings where MERV 8 performance is appropriate.
| Package Quantity | 1 Item |
|---|---|
| Item Returns | Sorry, the item can't be returned |
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