HAP, Carrier's Hourly Analysis Program, calculates how much cooling and heating a building needs. HVAC designers use it to size equipment and airflow for each space and for the whole system.
What you enter
- Weather data for the project location.
- Each space: area, walls, roof, glazing, orientation.
- Internal loads: people, lighting, equipment.
- Schedules and the air system serving the spaces.
What it gives you
Peak cooling and heating loads, supply airflow, coil loads and system sizing reports that feed your equipment selection.
Why learn the hand method first
If you understand where load comes from, you can spot an input mistake in seconds. That is why an HVAC design course teaches manual estimation before software.
Common beginner mistakes
Wrong orientation, missing fresh air, default schedules left unchanged, and glazing entered with the wrong properties.
How to learn it
HAP training works best with a real floor plan: enter it, check the result against a hand estimate, then adjust.
More under MEP, HVAC and BMS courses.
Frequently asked questions
Is HAP free?
HAP is licensed software from Carrier. Ask your trainer how access is arranged during the course.
Is HAP enough to become an HVAC designer?
No. It handles load calculation. You also need duct and pipe design, equipment selection and drafting.
What is the difference between E-20 and HAP?
E-20 is a manual form-based method. HAP is software that models loads hour by hour.