HVAC Design Suite

A preliminary, decision-support workflow. All design criteria (velocities, air rates, temperature differences) are user-entered; the suite assumes no code or standard table.

1. 1. Total cooling load

   Define the area and the load criteria you rely on.

   • Cooling Load Calculator

2. 2. Room-by-room load

   Use the total load as a cross-check for the room split.

   • Room-by-Room Cooling Load

3. 3. Fresh air & ACH

   Depends on the occupancy or space volume you define.

   • Fresh Air Calculator
   • ACH Calculator

4. 4. Required airflow

   Needs the space load and your chosen supply temperature difference.

   • Airflow / CFM Calculator

5. 5. Duct sizing

   Use the airflow produced in the previous step as the input.

   • Duct Sizing

6. 6. Velocity & static pressure

   Check velocity against your own design limits, then estimate pressure.

   • Duct Velocity Check
   • External Static Pressure

7. 7. Chilled water pipe sizing

   Needs the water load and the velocity/loss criteria you define.

   • Chilled Water Pipe Sizing

8. 8. Pump head

   Depends on the network lengths and losses you entered.

   • Pump Head

9. 9. FCU / AHU selection assistance

   Guidance only — final selection must come from the manufacturer's catalogue.

   • FCU/AHU Selection Assistant
   • HVAC Unit Converter

10. Professional report

    Once calculations are saved to your project, build one consolidated report and export it to PDF/Excel.

    Build the report

These tools are estimating aids only. They do not replace review by a competent engineer, authority approval, or verification against the codes and specifications applicable to your project. Each available tool states its formulas, assumptions, units and limitations explicitly, and assumes no code constants or market rates — all design criteria and percentages are user-entered.