https://www.hunker.com/13401942/the-air-return-size-for-a-furnace

Sizing ducts for a heating system is a complex task. ... They are called cold air returns, although they also return "used" air in combined heating and cooling ...

https://www.askthebuilder.com/hvac-return-air-ducting/

AsktheBuilder.com: HVAC ductwork sizing is critical for proper heating and ... An HVAC return air duct should be in every room except a bathroom and kitchen. ... in hot weather or are cold in cold weather you could have a return-air duct issue.

https://www.youtube.com/watch?v=rqE3HD5wNgg

Jul 17, 2013 ... Jones Air Conditioning talk about return duct, you need 200 square inches per ton in order to keep the noise down across you return grill. you ...

https://www.contractingbusiness.com/archive/how-determine-required-return-grille-airflow

When designing or redesigning an HVAC system, many contractors have asked how to determine the amount of airflow a return grille should pull from the ...

https://www.youtube.com/watch?v=cPIGIk3Atf4

Apr 29, 2013 ... David explains return grills, return grill whistling. Generally: 200 sq. inches per ton. Jones Air Conditioning www.jonesairconditioning.com 3920 ...

https://www.coburns.com/blog/Tech-Tips-Duct-Sizing-Chart

Jul 1, 2015 ... While a duct sizing calculator built for a specific type of ductwork is the best possible method for sizing ducts, the attached chart can be ... Note also the Return air grille sizing formula at the top of the chart. ... HVAC - Tech Tips.

https://www.thisoldhouse.com/discussions/topic/cold-air-return

The size of the cold air returns will depend on the size of the supply (hopefully ... return system was installed originally, and I would suggest having an HVAC ...

https://www.engineeringtoolbox.com/air-return-intakes-sizes-capacities-d_1592.html

Size and capacity of air return intake. ... Air Return Intakes - Sizes and Capacities. Size and capacity of air return intake. Sorry to see that you are blocking ads on ...

https://www.custommechanical.com/blog/3-things-know-return-vents

Feb 16, 2017 ... Your return vents are an integral part of the HVAC system in your ... They work to keep your interior pressurized and the interior air clean as ...

https://hvac-talk.com/vbb/showthread.php?2016411-Cool-air-return-duct-sizing-issues

Dec 7, 2016 ... I am upgrading my return ducts from running through joists to actual rectangular sheet metal ducts. This is a newly purchased home from 1910 ...