Thermal insulation in air conditioning system is primarily used to reduce heat gain or heat loss from piping. Other factors include preventing the icing of water vapor and condensation on cold surface.
Water vapor from the air or surrounding area must be kept from entering the cold side of the pipe to prevent condensation of moisture from the air on the outside of the cold piping.
Condensation can cause damage to surrounding areas such as carpet or other furnishing. Hence, the insulation must also acts as a vapor barrier.
Insulation Characteristics