VARIFLOW® filters are designed for high and medium efficiency air filtration in all types of commercial, industrial, and institutional HVAC installations and are available in both 6” and 12” depths and in three efficiencies: MERV 14 (90-95%), MERV 13 (80-85%) and MERV 11 (60-65%).

•Three efficiencies: (MERV 14) 90 - 95%, (MERV 13) 80 - 85%, (MERV 11) 60 - 65%
•Six styles of construction
•Eight sizes
•Two depths - 6" and 12"
•Compact design saves valuable in-line duct space
•Ideal for variable volume systems and difficult operating conditions
•Water resistant micro-glass paper media
•MERV 14 efficiency available with antimicrobial treated media (optional)

Select from six styles of construction:

•Metal construction
oStyle VMA - Box Construction (No header)
oStyle VMB - Single Header
oStyle VMC - Double Header
•Wood particle board construction
oStyle VFA - Box Construction (No header)
oStyle VFB - Single Header
oStyle VFC - Double Header

Designed for VAV Systems, Turbulent Conditions

The media pack, consisting of pleated micro-glass paper media and corrugated aluminum separators, is sealed inside the cell sides forming a totally rigid filter assembly. Rigid cell construction is recommended for variable volume systems. Fluctuations in filter face velocity, turbulent air flow or repeated fan shutdown have no effect on filter integrity or performance.

Ultra Fine Water-Resistant Media

Variflow media is made from ultra fine fiber micro-glass paper. Each efficiency has its own formulation for fiber size and density. Paper mat media is unaffected by humidity or intermittent exposure to water. Water does not pass-through media, but causes a temporary rise in resistance, which quickly falls back to normal levels as the moisture evaporates. Variflow filters are widely used in areas with high humidity or in systems where sensible moisture is likely to reach the filter.

Minimum Filter Depth Saves Space

Variflow filters are only 6" deep (250 FPM) or 12" deep (500 FPM), saving valuable space in designing the air filter section of the HVAC system.

Available with Antimicrobial Treatment

90 - 95% Bio•Pure Variflow filters are treated with an EPA registered antimicrobial agent to inhibit growth of bacteria, mold, mildew, and fungi on the media.

High Temperature Applications

All metal construction and micro-glass paper media also make Variflow filters suitable for high temperature applications up to 350° F. (Above 200° F, the recommended final resistance of 1.2" w.g. should not be exceeded.) For higher temperatures (up to 900° F), High Temperature Variflow filters made of aluminized steel are available.

VARIFLOW® - High and Medium Efficiency Extended Surface Air Filters