Worked HVAC examples for airflow, cooling load, duct sizing, chilled water, kitchen hood, and exhaust fan checks.
Sample inputs: area: 450; occupants: 55; lighting: 12; equipment: 18; ventilation: 10; envelope: 85
Use approximately 27.13 TR as a preliminary cooling capacity before detailed heat-load verification.
Run calculatorSample inputs: airflow: 2400; width: 600; height: 350; maxVelocity: 7; frictionClass: 1.2; codeProfile: gcc
The selected duct is within the entered velocity target of 7.00 m/s.
Run calculatorSample inputs: area: 120; height: 3.2; ach: 8; people: 25; cfmPerson: 20; tons: 12
Plan around 5,280 CFM based on the governing airflow method plus margin.
Run calculatorSample inputs: tons: 120; deltaT: 5.5; pipeId: 125; length: 90; maxVelocity: 2.4; margin: 10
The selected pipe diameter is acceptable for preliminary velocity planning.
Run calculatorSample inputs: length: 12; width: 8; height: 3.5; ach: 12; units: 4; cfmUnit: 75
Select an exhaust fan around 2,729 CFM before checking external static pressure and acoustic criteria.
Run calculatorSample inputs: codeProfile: ashrae; tons: 18; cfmTon: 400; ventilation: 650; margin: 10
Use approximately 8,635 CFM supply airflow for preliminary TR-to-CFM planning.
Run calculatorSample inputs: kw: 35
35.000 kW is approximately 119,425 BTU/h or 9.952 TR.
Run calculatorSample inputs: codeProfile: ashrae; length: 2.4; depth: 1.1; captureVelocity: 90; exposureFactor: 115; margin: 10
Plan approximately 3,235 CFM kitchen exhaust before manufacturer hood selection and balancing.
Run calculator