Why use membrane cooling filters versus non-membrane filters?

Reliable protection of system electronics requires highly efficient filtering of ambient air to remove submicron particles and aerosols while also preventing water ingress into the cabinet. This is best achieved by using membrane filter media, which provides 99% particle filtration efficiency at the 0.3um level yet still allows high airflows. Not only do membrane filters eliminate costly failures caused by corrosion and other pollutants, but they are also maintenance free and have longer lifetimes than non-membrane alternatives.

Unlike conventional non-membrane filters, GORE® Cooling Filters have been specifically developed for outdoor cooling and protection under extreme environmental and climatic conditions. GORE™ Membrane filters comply to all relevant telecom industry regulations. They are tested for water-tightness and achieve IPX5 grade protection without requiring special louvers. They offer HEPA H11/12 class filtration even for submicron particle sizes. GORE® Cooling Filters are maintenance-free and optimized for longest possible lifetime.

Membrane Filter (500X SEM)		Non-Membrane Filter (500X SEM)
GORE expanded PTFE membrane’s microporous structure provides higher filtration efficiency		The open structure of non-membrane filters lets dust and small particles pass right through into cabinet