What information is required to replace a 40 Ton rooftop HVAC unit?
What Information Is Required to Replace a 40 Ton Rooftop HVAC Unit?
Replacing a 40 Ton commercial rooftop HVAC unit requires more information than nominal cooling capacity alone.
For an accurate replacement evaluation, YUJU recommends collecting the following information from the existing equipment and building:
- Existing manufacturer and model number
- Nominal cooling capacity
- Supply airflow
- External static pressure
- Voltage / Phase / Frequency
- Downflow or horizontal configuration
- Supply and return duct-opening dimensions
- Existing roof curb dimensions
- Fresh-air or economizer requirements
- Heating configuration if required
- Control-system requirements
- Maximum allowable equipment dimensions
- Project location
Existing RTU → Capacity → Airflow & ESP → Curb & Duct Interface → Electrical → Refrigerant → Controls → Final Replacement Configuration
For replacement projects, installation photographs, the existing equipment nameplate and rooftop curb drawings can significantly improve preliminary equipment matching.
YUJU can support project-based evaluation for 20 Ton, 30 Ton, 40 Ton, 50 Ton and larger commercial rooftop HVAC replacement applications.



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