Cold air return sizing help

10 x 25 would be standard for a 2 ton system return (250 square inches). We measure how well a system does by static pressure. In your case, ...

Calculation For Return Vents? - HVAC-Talk

Yes, the simple rule is 2 cfm per sq. in. example: 20x25=500 sq. in. x 2= 1,000 cfm or 2.5 ton of air. Of course, the ductwork size is equally ...

Basic Return Duct Sizing Made Simple - YouTube

In this video, I talk about return duct, you need 200 square inches per ton in order to keep the noise down across you return grill. you air ...

How large should a return HVAC duct be relative to the size of the ...

OK, I have heard from multiple HVAC contractors that a general rule of thumb in a single trunk return, single trunk supply duct system, ...

Cold air return sizing | DIY Home Improvement Forum

Return air ducting should have 100-150% of the cross sectional area of the supply ducts.

Cold air return size? : r/HVAC - Reddit

I'm not too sure I follow but theres a good app for sizing ductwork based on room etc called "vent tools" by lindab it might help. Upvote 1

Basement Cold Air Return Sizing for a rec room : r/hvacadvice - Reddit

8x16 minimum. 8x24 would be good. If you're pulling from two wall cavities, you might as well put an 8x30. We usually put ...

How Many Return Air Vents Do I Need? | PV Heating, Cooling

Factors that impact the number of air returns · HVAC system size (tonnage) · Home size and room dimensions · Number of stories in your home ...

Learn How To Install Return Air Duct In Your Home

If you are installing just one or two return vents, you will want to go with a 12-inch return for 2-ton units and lower. 14- inches for 3 and up. 16-inch should ...

How to Modify Cold Air Return Ducts for Efficient Heating and Cooling

Although it's easier to modify cold air return ducts, adding new cold air returns so there's one in every room is the best way to achieve balanced airflow in ...

How much Return Air do you need? - YouTube

Comments88 ; HVAC Return Vent ISSUES! DO NOT Locate Return Vents HERE! HVAC Guide for Homeowners · 42K views ; How to Size my Return Air ...

The Air Return Size for a Furnace | Hunker

A typical supply vent is 4 by 10 to 12 inches and a typical return vent is 16 by 20 inches or larger. Houses often have two or more return collecting points.

Return air pathway sizing? - DoItYourself.com Community Forums

A good rule of thumb is that return air ducts should be 1-1/4 to 1-1/2 times the area of the supply duct. This holds true from individual rooms to main supply ...

Basement Cold Air Return Duct & Vent Size? - HVAC Site

Looking for some help sizing the a return air vent in my basement. I am currently in the process of finishing my basement and I am looking ...

Return Air Duct Size Calculator

To calculate the return air duct size, take the square root of 144 times the size of the air conditioner. D ...

sizing ductwork, quick and easy shortcut - YouTube

HVAC Guide for Homeowners•25K views · 9:37 · Go to channel · Air Duct Calculation explained. Able Distributors - Your HVAC Solutions Delivered!

Increasing Comfort, Energy Efficiency and Revenue by Properly ...

Although some systems will work properly at lower cfm per ton (325 to 350 cfm), always size the return duct work at 400cfm per ton and no more ...

How to Size my Return Air Conditioning Grills Correctly? - YouTube

David explains return grills, return grill whistling. Generally: 200 sq. inches per ton. Thanks for watching!

Need Help Sizing Cold Air Return | Hearth.com Forums Home

The area itself will act as a duct.The perimeter returns don't need to be large, 4"x12" should be sufficient for smaller rooms. The supply is ...

How many cold air returns do you need per square foot in a house?

The minimum is one per house, if it is big enough. The rules are based on air velocity and filter grill size. Square footage of the house is not ...