Air Return From Finished Attic

A return air temp b outside air temp c airflow across evaporator coil d return air leaks from attic if you measure supply and return temperatures at the grille and at the air handler you can get an good idea of where your biggest losses are occurring.

Air return from finished attic.

At 21c i d guess you have a lot of leaks on the return side. This pulls the air across your body. Additionally this is a great time to have your ducts cleaned so they facilitate reliable air flow. While none of these spaces makes an acceptable air pathway on its own some building cavities such as floor joists can make acceptable duct chases to contain an insulated air sealed metal or flex supply or return duct.

To add heat and air conditioning to your attic you must have enough ductwork. Intake vents located at the lowest part of the roof under. The return vent pulls cold air from the bottom of the room and returns it to the furnace to be reheated and returned as warm air. If you re finishing your attic insulating it to the proper r value can cause a dramatic loss of.

Our trained technicians can inspect your ducts and let you know if your renovation will need modifications or extensions for existing infrastructure. Air handler platforms used as return air plenums can draw air from vented attics and crawlspaces through other connected framing cavities. Cool air in hot air out attic ventilation works on the principle that heated air naturally rises primarily utilizing two types of vents. I installed these return air pathways in my condo three years ago and that video shows the one in our guest bedroom where the positive pressure created by the lack of a return air pathway was the worst.

Install air chutes before installing insulation. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room. Insulate your finished attic properly choose your insulation. It is close to the furnace and actually on an adjacent wall.

Unlike supply vents return vents do not need to be cased in metal. It s much better to place it low to suck out the cold stratified air. If the supply ducts are high or in the ceiling then the return air ducts or grills should be low on a wall. If the supply ducts are in the floor then the return air should be located up high.

It made a huge difference dropping the pressure in the bedroom relative to the hallway from about 6 7 pascals pa to about 1 7 pa. Place your cold air return vents on the inside walls of buildings at the lowest point.