How the fiberglass insulation will affect the heating and cooling?

Insulation reduces the exchange of heat through a surface such as a wall, attic, duct or roof. In a well-insulated home, less warm air escapes from the house during the winter, and less cool air escapes during the summer, reducing the amount of energy needed for HVAC pros use fiberglass insulating blankets to wrap the ductwork. They prevent the cooled air from warming in the summer or the hot air in the winter from cooling as it passes from the blower compartment to your rooms. heating and cooling .

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