The heavy-duty spun glass is a continuous filament spun glass. The frame is made with one continuous piece of chipboard to guard against corner separation. A tough metal media retainer is adhered to the frame on both upstream and downstream sides for extra filter strength. For peak equipment protection and energy efficiency, these filters should be changed monthly in periods of high use.
- Two-sided metal reinforcement (both air entry and exit sides)
- Maximum air flow
- Alleviates strain on equipment
- UL Class II