You need 350 to 400 cfm per ton (12,000 btu) of cooling. So, divide your cfm by 400. For example, a 1200 cfm blower on an air handler could handler up to 3 tons. All calculations depend on your duct being the proper size for the equipment.
cfm=.32X(aXb)Xface velocity/144 a= width b=length
To calculate BTUs from CFM (Cubic Feet per Minute) and wet bulb temperatures, you can use the formula: BTUs = CFM × 4.5 × (Wb1 - Wb2), where Wb1 is the wet bulb temperature entering the system and Wb2 is the wet bulb temperature exiting the system. This formula accounts for the energy required to change the moisture content of the air. Be sure to convert temperatures to the same unit (usually Fahrenheit) before applying the formula.
There are 400 cfm in 1 ton
Take the number of cubic feet and divide that by the number of minutes. cfm=cf/m
20tr cfm calculatin
formula
You need 350 to 400 cfm per ton (12,000 btu) of cooling. So, divide your cfm by 400. For example, a 1200 cfm blower on an air handler could handler up to 3 tons. All calculations depend on your duct being the proper size for the equipment.
AFU
To calculate the weight of an Air Handling Unit (AHU), you would need to know the dimensions and materials used in its construction. Multiply the volume of the AHU by the density of the materials to determine its weight. Additionally, you can refer to the manufacturer's specifications for the AHU's weight.
increase the cfm for the ahu
The CFM of the equipment are given, how to calculate Static Pressure for it.
by u tube manometer
20x20
To calculate CFM (cubic feet per minute) using a manometer, measure the pressure difference across a restriction in the airflow system. Use the manometer reading and the area of the restriction to determine the velocity pressure. Then, use the velocity pressure to calculate the airflow in CFM using the formula CFM = (Velocity Pressure * Area of the Restriction) / 4005.
To calculate the horse power of a compressor one would need to use the following calculation. Pump ratio x GPM @ 100 psi = CFM. For a gas compressor divide CFM by 2 and for an electric compressor, divide CFM by 4. GPM is gallons per minute and CFM is air consumption in cubic feet per minute.
An ahu is an alternative name for the Asiatic gazelle.