For snap-fit vents designed for outdoor use, anti-UV properties are often a key consideration. Exposure to prolonged sunlight can cause degradation of plastic materials, leading to brittleness, discoloration, cracking, or loss of structural integrity over time.

To address this, manufacturers may use UV-stabilized materials that resist the damaging effects of ultraviolet radiation. These materials are typically engineered plastics infused with UV inhibitors or stabilizers during production, which help block or absorb UV rays and prevent material breakdown.

In contrast, snap-fit vents intended for indoor use rarely include anti-UV treatments. Indoor environments have minimal UV exposure, so adding anti-UV components would be unnecessary and could increase production costs.

Such vents are usually made of standard plastics that meet basic performance requirements but lack resistance to UV radiation. Using them outdoors would result in rapid deterioration, affecting their ventilation function and service life.