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HVAC, climate and environmental technology can face a hard life because the environments it operates in are inherently challenging. The extreme temperatures and windblown moisture of the great outdoors are seldom merciful. Even supposedly comfortable indoor settings can take their toll. Devices often reside in the ‘backstage’ areas of buildings: plant rooms, rooftops, duct spaces, basements and external walls – far from controlled environments like an office or laboratory. Temperatures can fluctuate significantly. Even ambient indoor spaces may create microclimates inside enclosures, due to heat generated by relays, power supplies or processors. Temperature swings can cause condensation inside enclosures.