Airflow Forumulas

Gas heat rise CFM = heat-x input btu x heat-x eff.* / 1.08 x unit heat rise
* If blower motor is in the air stream add its btu to heater output btu

Electric heat rise CFM = heater watts x 3.413* / 1.08 x temp rise 

Velocity (fpm) = 4005 x sq. root of velocity pressure 

CFM = fpm x sq ft of duct

Connecting a test unit to a flow-meter:
Never allow the outlet air static to drop below 0”since the unit will then not be doing all the work

Fan Laws: For a given, fixed system.

The Calculating tool uses both quantitative data and qualitative information covering HVAC design, installation and operation to benchmark energy efficient performance and identify potential areas for improvement.

AC cooling load


AC Heating Load


HVAC Efficenet

Conversion Tool

User warning: all this results are based on quick estimate calculation. Exact heat /cool load can be determined with a full heat and cool load analysis

So, whether you need a small split system, large chiller & cooling tower or boiler plant, AIR TRACK INC
can provide you with a customized solution. Give us a call – (905) 330 4056.

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