Return Air Duct Design

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.

Return air duct design. The unico return duct upc 04 xxxx is an acoustical flex duct 10 ft 3 m long. This is the best configuration and mandatory if the unit has a 5 ton blower. Each one in a system can add as much as 80 to the tel. The furnace or air handler is probably on the other side of the wall.

Rounded throats on ells drastically improve airflow especially a rounded inside throat. The return air ducts in an hvac system are especially liable to get taken for granted even though their part in heating and cooling your home is just as essential as supply ducts. 9 3 pressure balancing. 9 2 central return.

This duct does an excellent job of absorbing sound from the blower. 10 4 diffusers grilles registers. And δt being the temperature difference between the designed air temperature and the design return temperature. It plays a vital role in the home s forced air heating and cooling system performing its job quietly and without much attention.

6 tips for good ductwork design. Not providing enough returns is a common ductwork design flaw that leads to comfort complaints. The third example shows a return air base beneath the air handler furnace. 10 3 fire and smoke dampers.

9 1 distributed return. Duct fittings and terminal units. 10 2 volume control dampers. A person can be forgiven for not knowing much about their home s air duct system.

Return duct systems. They should be on interior walls across the room from the supply ducts that should be washing exterior walls with conditioned air the red arrow points to a large wall mounted return air vent. Duct sizing duct calculation duct design energy efficient ductwork design. Square ells return or supply are a bad idea.

10 1 duct fittings and transitions. An hvac return air duct should be in every room except a bathroom and kitchen. Just to note that we will use a cp of 1 026 kj kg k as standard and the delta t should be less than 10 c so we ll use 8 c. 8 7 rules of duct design acca manual d residential duct systems 9 0.