The Permatron 1" deep frame DuraLoft® Air Filter is engineered specifically for harsh, wet, and corrosive environments where standard HVAC filters fail. Designed with rigid high-loft PermaFlo® polyester media, DuraLoft delivers exceptional moisture-handling performance and reliable particulate capture — making it the ideal first line of defense for marine, industrial, and high-humidity applications.
Whether you’re protecting HVAC equipment on a vessel, in a processing plant, or inside a high-moisture mechanical room, DuraLoft provides long-lasting durability and dependable filtration
| 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
Built for Wet & Corrosive Environments
DuraLoft is specifically designed for marine, coastal, and high-humidity locations, where airborne contaminants like dust, bacteria, mold, yeast, and VOCs can quickly damage equipment.
High-Loft PermaFlo® Polyester Media
The rigid blue polyester fibers offer:
• Greater moisture condensation surface area
• No flaking, shedding, or sharp edges
• Long service life even in extreme conditions
MERV 5 Performance
Provides effective capture of larger airborne particles while maintaining low airflow resistance — ideal for pre-filter or standalone use in demanding environments.
Washable & Reusable
The polyester media can be rinsed clean with water, reducing replacement costs and maintenance downtime.
Available in 1" or 2" Thickness
Choose the right depth for your system’s airflow and filtration requirements
Ideal Applications
The DuraLoft filter is widely used across industries that demand rugged, moisture-resistant filtration, including:
• Marine vessels & offshore platforms
• Coastal HVAC systems
• Industrial enclosures
• Power generation facilities
• Electronics cooling
• Transportation & wind turbine systems
• Office buildings & processing plant
Technical Specification
- Plastic or stainless steel filters are made to withstand corrosive environments, including thorough cleaning practices that include chlorine bleach
- 1” thick black plastic or stainless steel frame or 2” thick stainless steel frame available
- Initial air flow resistance 0.05” w.g. – 1" thickness
- Initial air flow resistance 0.12” w.g. – 2" thickness
- 1” or 2” is rated MERV 5
- Five-year warranty
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