Insulating Air Conditioning Ducts In Attic

What i ve observed attic temp 50c vent temp 21c attic temp 37c vent temp 18c attic temp 25c vent temp 13c not sure what the r value off flexible duct or main metal duct is.

Insulating air conditioning ducts in attic.

Other times insulation may be on the outside. Here is a description of the phenomenon. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. According to rightsuite the software we use the supply ducts have about 560 square feet of surface area and the return ducts 101 square feet.

Looking at the cooling side only the additional load would be. I live in montreal and had a lennox air conditioner and ducts installed in the attic. But the air in the ducts is facing a delta t of maybe 100 f or 120 f a greater delta t. I was wondering is there any figures on the expected energy temp lose.

Imperial 4 in x 60 in galvanized steel round duct pipe. Flexible ductwork comes with different insulation r values. The metal duct boot the fitting that holds the register or diffuser that is visible on your ceiling is also cold. For pricing and availability.

Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. All the ducts are in the attic. The attic duct is cold because cold air is flowing through it. Hot air tends to rise and an attic is the best place for hot summer air to creep inside your home and destabilize the efforts of your hvac in maintaining a cool temperature.

Find hvac duct fittings at lowe s today. After all most new homes have r 49 insulation on the attic floor holladay continues. Put it in an attic full of blown insulation and you re forcing. So logically the ducts deserve more not less insulation.

The condenser in your air conditioner works hard to get rid of heat and pressurize refrigerant for the return trip through your house. R 8 duct insulation 5 227 btu hour. Sometimes the insulation is inside the ductwork. How to insulate hvac ductwork today s homeowner.

A round duct is the most effective. Fresh air ducts will focus on the fresh air in your air conditioning system. Make sure the foil surface of the insulation is free of dust before applying the tape. Imperial 6 in x 300 in insulated polyester flexible duct.

You will need less material than you would for a rectangular or a square duct. When the attic is 20 f that insulation is addressing a delta t of 50 f. Because the moving air is in the ductwork for only a short period of time it does not need the insulation r value the attic floor requires.