Latent heat of air

(1) Energy removed from air due to the condensation of moisture. (2) Change in enthalpy during a change of phase.

Liquid Flow

Typically the flow of liquid moisture via gravity or capillarity


Short for low emissivity, which means the characteristic of a metallic glass coating to resist the flow of radiant heat. A thin metallic oxide coating increases the U-value and/or decreases the SHGC of the window by reducing heat flow from a warm(er) surface to a cold(er) glazing surface. The best location for the coating should be calculated but is often based on whether the primary heat flow control direction is from the inside out (heating climates) or the outside in (cooling climates).