Assessing Commercial HVAC Equipment Longevity

What happens here

The electrician pans across the commercial roof, showing large HVAC units. He identifies the equipment as 3 Phase 230-240V HVAC. He then shares a general tip for evaluating equipment: if older equipment is still functioning well, it is often an indicator that it was of good quality and was installed correctly. This contrasts with some newer equipment, such as that from Carrier, which he implies might not be as durable.

Goal: Understand that the age and continued functionality of equipment can indicate its quality and the quality of its installation.