Cold Air Return Duct Design

The flexible design allows for connection of a new or existing side air return on either side based on the placement of the reinforced sheet metal panel of the return air box assembly.

Cold air return duct design.

First building codes in many areas require that the cold air return line gets external insulation and therefore you will need to leave a gap for the insulation around the duct return line. For each cubic foot of air that is pumped out into your home the same amount must be drawn back in so the process can start over. The furnace or air handler ahu in the drawing below pulls air through the return ducts conditions that air and then sends it through the supply ducts back into the house. To maintain balanced air pressure and air movement your duct system needs return vents for air in the room to be pulled back into the hvac system.

If the supply ducts are in the floor then the return air should be located up high. Plus the knock down design simplifies transporting to the job by taking up very little space. It s important that roughly the same amount of air moves through supply ducts as return ducts in order to maintain neutral air pressure in rooms. In addition we offer take offs elbows round duct pipe and register boots that can be connected to the starting ductwork and run to each room.

This duct does an excellent job of absorbing sound from the blower. After you install the duct through the studs you will need to add framing around the top and bottom of the ductwork to allow for a wall finish such as drywall. Supply air from furnaces and air conditioners should be on outside walls. With a few materials and just a little work you can modify cold air return ducts for significantly better balance.

Cold air returns bring this unconditioned air back to the furnace. Cold air returns in order for your ductwork system to operate properly the furnace must have a consistent source of air that is cycled back into the unit. The unico return duct upc 04 xxxx is an acoustical flex duct 10 ft 3 m long. Not providing enough returns is a common ductwork design flaw that leads to comfort complaints.

These ducts draw air into your system from the interior of your home or from outside. Ductwork design mistake 5. We offer the starting ductwork for furnaces and air handlers called supply air plenums and return air plenums. Running a metal cold air return duct between studs requires knowledge of both hvac systems and the components involved in framing.

The same fan operation that delivers air to your home s rooms draws that air back to the equipment via return ducts. The problem with bedrooms occurs in houses where the hvac design did not include return vents in each bedroom. Cold air ducts are an essential but often neglected part of your hvac system. This pulls the air across your body.

If you need a longer duct add either another sec tion of the unico return duct or a length of plastic core flex duct between the unit and the unico return duct. More product details close. The return air vent openings need to be on the opposite side of the room so the conditioned air is pulled across the room.