Insulation for HVAC refers to specialized materials applied to ductwork, pipes, and equipment to control temperature, prevent condensation, and reduce energy loss. This includes flexible duct wrap, rigid foam board, fiberglass duct board, and pipe insulation sleeves. Proper insulation minimizes heat gain/loss in ducts, prevents condensation (“sweating”) on cold surfaces like refrigerant lines, and reduces system noise. Key selection factors are the R-value (thermal resistance), vapor retardant properties for moisture control, and fire safety ratings. Correct installation with sealed seams and joints is essential to achieve the intended thermal and condensation control performance.

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