Commercial systems
Know the systems behind your space.
Start with an equipment list, service history, and the needs of the people in your building.
Your questions, answered
What should we know about rooftop units and chillers?
Record the model, age, condition, capacity, and service history of each unit. Ask your provider which issues affect comfort, operating cost, and reliable service.
Why do ventilation and controls matter?
Ventilation manages outdoor air. Controls help run the system. Have a qualified pro check that settings and schedules fit how the building is used.
Can a residential contractor handle our building?
Check the provider’s license scope, insurance, and experience with your system. A home service background alone does not show the skills needed for your building.
Your next three steps
1Record equipment and controls.
2List comfort and uptime needs.
3Check scope and system experience.
Editorial guidance · Updated October 12, 2026 · Sources & scope