Insulating Air Conditioning Ducts In Attic

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.

Insulating air conditioning ducts in attic.

You will need less material than you would for a rectangular or a square duct. 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. For pricing and availability. How to insulate hvac ductwork today s homeowner.

So logically the ducts deserve more not less insulation. Imperial 6 in x 300 in insulated polyester flexible duct. This old paper faced insulation on hvac ductwork needs updating. Attic insulation keeps summer heat waiting proper attic insulation prevents summer s hot air from entering the house.

All the ducts are in the attic. Find hvac duct fittings at lowe s today. I live in montreal and had a lennox air conditioner and ducts installed in the attic. The attic duct is cold because cold air is flowing through it.

Make sure the foil surface of the insulation is free of dust before applying the tape. Sometimes the insulation is inside the ductwork. R 8 duct insulation 5 227 btu hour. But the air in the ducts is facing a delta t of maybe 100 f or 120 f a greater delta t.

After all most new homes have r 49 insulation on the attic floor holladay continues. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place. Imperial 4 in x 60 in galvanized steel round duct pipe. Looking at the cooling side only the additional load would be.

The condenser in your air conditioner works hard to get rid of heat and pressurize refrigerant for the return trip through your house. Here is a description of the phenomenon. Flexible ductwork comes with different insulation r values. 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.

I was wondering is there any figures on the expected energy temp lose. Insulating hvac ductwork when insulating hvac ductwork use a foil faced fiberglass insulation with an r 6 or higher r value. When the attic is 20 f that insulation is addressing a delta t of 50 f. Other times insulation may be on the outside.

The air in your vented attic is hot and humid just like all outdoor air in florida. Fresh air ducts will focus on the fresh air in your air conditioning system. A round duct is the most effective.