Fire Retardant Protection Engineered and Tested

Electronics enclosures don’t fail quietly — a thermal event inside a rack or panel can spread in seconds if the surrounding materials feed it instead of stopping it. Universal Air Filter capable of designing custom air filters with fire retardant protection, so the same components that manage airflow and dust also work to contain flame and limit smoke propagation. For over 60 years, UAF has engineered custom air filtration for mission-critical electronics — fire safety has always been part of that equation, not an afterthought.

Every UAF fire retardant solution is built and tested to recognized industry standards, giving design engineers a filtration system that meets safety codes without compromising airflow or thermal performance.

Fire Retardant Filter Media

UAF’s core filter media platforms are available in fire retardant formulations, so flame safety doesn’t require a separate product line or a compromise on filtration performance.

Quadrafoam™ is an open-cell polyurethane foam specially coated for improved fire retardation and fungi resistance, offering deep loading capacity, high dust-holding capability, and low airflow resistance across a wide range of climates. It’s a cleanable, permanent media suited to industrial enclosure applications.

Polyester Media is a non-woven, non-migrating synthetic media rated up to 90% ASHRAE dust arrestance. It’s listed UL 94 HF-1 and UL 900 Class 2, making it a disposable, high-performance option for electronics, telecom, and medical equipment where a lightweight, low-pressure-drop media is preferred.

Both media types are available as framed filter assemblies or cut-to-size pads, and they meet the standards design engineers are already specifying against:

• UL 94 HF-1
• UL 900
• Telcordia NEBS GR-63-CORE
• CE
• RoHS

PyroCide Vent Panel — Active Fire Containment

Where filtration alone isn’t enough, PyroCide Vent Panels add an active layer of fire containment to the enclosure itself. PyroCide is an aluminum honeycomb thermal barrier treated with a heat-responsive intumescent flame coating. Under normal conditions, it behaves like any low-resistance honeycomb vent panel — maximizing airflow while air-straightening. When exposed to flame or excessive heat, the coating reacts and expands rapidly, filling the honeycomb cells with foam that blocks flame propagation through the vent.

PyroCide is fabricated with precision metal frames and housings to meet edge-to-edge venting requirements, even in intricate enclosure designs, and the coating itself carries an ASTM E-84 Class A rating with low flame spread and low smoke index values.

CableVent™ — Fire-Safe Cable Pass-Through

Cable entry and exit points are a common gap in enclosure fire protection — traditional cable brushes don’t address flame safety at all. CableVent™ closes that gap. It’s a fully customizable foam cable pass-through system built with UL94 V-0 and HF-1 rated polyurethane foam, engineered to replace rigid cable brush assemblies with a solution that manages airflow, dust ingress, and cable strain relief simultaneously.

CableVent is available in two foam configurations — closed-cell for a tight seal that blocks airflow, or open-cell where additional airflow and dust filtration are needed — and both are rated for a minimum 10-year service life in standard operating conditions. It fits vertical, horizontal, or curved enclosure surfaces without additional mounting hardware, and is used across telecom, data center, military, and medical equipment.

Why It Matters for Your Design

	Fire Retardant Media	PyroCide Vent Panel	CableVent
Function	Filters dust while resisting flame	Actively seals against flame spread when heated	Manages cable pass-through with flame-rated foam
Standards	UL 94 HF-1, UL 900, NEBS	ASTM E-84 Class A	UL94 V-0, HF-1
Best for	General enclosure filtration	Vent openings requiring active fire containment	Cable entry/exit points

Used together, these three product lines let engineers address fire safety at every point air and cables move through an enclosure — not just at the filter face.

Talk to a UAF Engineer

Every application has different flame safety, airflow, and space requirements. UAF’s engineering team can help you specify the right combination of fire retardant media, PyroCide vent panels, and CableVent pass-throughs for your enclosure design.