The Permatron DuraLo® High Flow Low Resistance Air Filter is engineered for demanding environments where moisture, salt air, and corrosive contaminants quickly destroy standard HVAC filters. Built with rigid, high-loft PermaFlo® polyester media, DuraLo delivers dependable MERV 5 performance and long-lasting durability in marine, industrial, and high-humidity applications.
If your system operates in a corrosive or moisture-rich environment, DuraLo provides the rugged protection your equipment needs.
| Nominal Size (½" undercut on L × W) |
| 10 x 20 | 12 x 30 | 14 x 25 | 16 x 24 | 18 x 24 | 20 x 24 |
| 12 x 12 | 12 x 36 | 14 x 30 | 16 x 25 | 18 x 25 | 20 x 25 |
| 12 x 20 | 14 x 20 | 15 x 20 | 18 x 18 | 18 x 30 | 20 x 30 |
| 12 x 24 | 14 x 24 | 16 x 20 | 18 x 20 | 20 x 20 | 24 x 24 |
Custom sizes and bulk pricing are available. Contact us with your specifications and we’ll provide a tailored quote.
Key Features & Benefit
Designed for Corrosive & Marine Conditions
Ideal for coastal facilities, marine vessels, offshore platforms, and industrial spaces exposed to salt spray, humidity, and chemical vapors.
High-Loft PermaFlo® Polyester Media
The rigid blue polyester fibers offer:
• Excellent moisture resistance
• Stable filtration performance
• No shedding, flaking, or fiber breakdown
• Long service life even in harsh conditions
MERV 5 Filtration Efficienc
Captures larger airborne particles such as dust, lint, mold spores, and debris while maintaining low airflow resistance
Washable & Reusable
The polyester media can be rinsed clean, reducing maintenance costs and extending filter life.
Durable, Corrosion-Resistant Construction
Built to withstand environments where metal filters corrode and pleated filters deteriorate quickly.
Available in 1" or 2" Thickness
Choose the right depth for your system’s airflow and filtration requirements
Ideal Applications
The DuraLo filter is commonly used in:
• Marine HVAC systems
• Coastal buildings & seaside facilities
• Industrial processing plants
• Power generation equipment
• Electronics cooling systems
• Transportation & wind turbine enclosures
• High-humidity mechanical rooms
Technical Specification
- Plastic and stainless steel filters are made to withstand corrosive environments, including thorough cleaning practices that include chlorine bleach
- Contains front and rear black polymer grid for added support
- Encased within a 1” or 2” thick stainless steel frame
- Initial air flow resistance 0.05” w.g. – 1" thickness
- Initial air flow resistance 0.06” w.g. – 2" thickness
- 1” or 2” is rated MERV 5
- Five-year warranty
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