Short for cubic feet per minute, a measurement of the velocity at which air flows into or out of a space.
cubic feet per minute
The CFM of the equipment are given, how to calculate Static Pressure for it.
2000 cfm. 400 a ton.
form_title= HVAC Systems form_header= Replace or repair your HVAC system. How old is your existing HVAC system?*= _ [50] Do you want to replace your HVAC system?*= () Yes () No Do you want the system to be Energy Star compliant?*= () Yes () No
Precision A/C systems are primarily designed for cooling electronic equipment, rather than people. These pre-packaged systems offer excellent reliability and typically have a high ratio of sensible-to-total cooling capacity and a high CFM/ton ratio.
cubic feet per minute
Short for cubic feet per minute, a measurement of the velocity at which air flows into or out of a space.
CFM is a really in depth subject. With that question you are at the point where you should be looking in to some books; there are good hvac books available threw Amazon .com and some local book stores .
CFM stands for "cubic feet per minute" and is a measure of the volume of air moving through a fan or duct. SCFM is "standard cubic feet per minute," usually taken to mean CFM of "standard air," air at 68 degrees F and atmospheric pressure at sea level.The HVAC Veteran
The recommended return air duct size for optimal HVAC system performance is typically 1 square inch per 1 CFM (cubic feet per minute) of air flow.
To convert cmh to cfm ..... divide cmh by 1.7 to convert into cfm....
Tr = cfm/400
750 CFM
1tr = 400 cfm
5-10 cfm = -5
CFM International was created in 1974.
I use an instrument called a "moving van anenometer" to measure velocity of the airflow in feet per minute. I take multiple readings at each register, average them, and multiply them by a percentage factor based on the "free area" of the register to obtain a volume reading in cubic feet per minute. Then I add up the CFM (cubic feet per minute) of each supply register in the room to determine the total air supply to that room.The HVAC Veteran