Table of Contents
How do you convert CFM to tons?
For example, to estimate the number of tons required to cool a 1,600-sq-ft home, multiply 1,600 by 1 cfm/sq ft to get 1,600 cfm of air. Using the 400-cfm/ton rule, divide 1,600 cfm by 400 cfm/ton to get 4 tons of required cooling.
What is the CFM for a 5 ton unit?
2,000 cfm
A 5-ton system should have have 2,000 cfm, a 6-ton system should have 2,400 cfm, and so on and son.
How many CFM is a 7.5 ton?
Most packaged air conditioning equipment is designed for, and rated at, 400 CFM per ton. Typically, a 7.5 ton unit will be selected with a drive package that causes it to deliver 3,000 CFM against whatever resistance the ductwork and grilles offer.
Why is 400 cfm a ton?
400 CFM per ton of air conditioning: The higher CFM is required to remove the sensible heat from the environment. However, if you have an environment that has high humidity then 350 CFM per ton is better. At the lower CFM the coil is colder and the air spends more time on the coil and increases dehumidification.
How many CFM does a 12 flex duct carry?
480 CFM
CFM Sizing Chart For Flex Round Ducts (50-1,700 CFM)
| Duct Size (Inches) | Flex Duct Airflow (CFM) |
|---|---|
| 8 inches | 160 CFM |
| 9 inches | 225 CFM |
| 10 inches | 300 CFM |
| 12 inches | 480 CFM |
How many CFM do I need for a 12×12 bathroom?
The rule of thumb is that you need at least 1 CFM per square foot of room area. To determine the square footage of your bathroom, multiply the length times the width.
How many CFM does it take to ventilate a room?
For continuous indoor air quality ventilation, a heat or energy recovery ventilator (HRV or ERV) should provide 0.35 air changes per hour….Heat and energy recovery ventilators.
| Total area of home (square feet) | Continuous ventilation rate |
|---|---|
| 1,000 square feet | 50 CFM |
| 2,000 square feet | 100 CFM |
| 3,000 square feet | 150 CFM |
How many CFM does a 7 inch duct?
CFM Sizing Chart For Flex Round Ducts (50-1,700 CFM)
| Duct Size (Inches) | Flex Duct Airflow (CFM) |
|---|---|
| 5 inches | 50 CFM |
| 6 inches | 75 CFM |
| 7 inches | 110 CFM |
| 8 inches | 160 CFM |
How many CFM is a 4 inch duct?
Reviewing the chart, a 4” pipe will convey 395 CFM at 4500 FPM. This means that a 4” pick-up on a machine will use 395 CFM from the filtering system; or, if you know that a machine will require approximately 400 CFM to remove the waste, you should use a 4” pipe for that purpose.
Why does 400 CFM per ton?
The airflow is measured in cubic feet per minute (CFM). 350 to 400 CFM per ton of cooling is required for proper air conditioning system operation. For example, if you are checking a 3 ton system, the air flow required is between 1050 and 1200 CFM.
What is 400 CFM per ton?
400 CFM per Ton. A rule of thumb in air conditioning work is that 400 cfm of air is equal to 1 ton. If 400 cfm of air and a delta T of 20 degrees is achieved, this is equal to only 400X20X1.08=8640 btu/h..
How many CFM per ton of air conditioning?
The cubic foot per minute, or cfm, per ton of air conditioning varies depending on application. Approximately 400 cfm is required for normal use, while 500 cfm is needed for high sensible heat situations.
How many CFM per ton of cooling?
Calculating System CFM. We commonly accept that nominal airflow across the evaporator in a residential or light commercial comfort cooling air conditioning system should be about 400 cfm per ton of cooling.