We service commercial equipment from the same manufacturers as residential plus a few additional brands common on light commercial work: Carrier, Trane, Lennox, Goodman, Rheem, Bryant, York, American Standard, plus Day & Night, Heil, ICP, and Comfortmaker on commercial-only product lines. Our equipment scope tops out around 7.5 tons. Larger rooftop units, chillers, VRF systems, and process cooling are outside our scope and we refer those calls to commercial specialists.
Standards on commercial work follow the same EPA Section 608 framework as residential. Refrigerant recovery is documented. Vacuum integrity is verified. Final charge is set by subcooling or superheat. The additional standards that apply more often on commercial work include OSHA fall protection for rooftop work, ladder safety standards, and confined space awareness on some equipment closet installations. None of this is fancy. It's what makes the work safe for the tech and legal for the customer.
On documentation, commercial repair invoices include the same workmanship warranty terms as residential, but the invoice routing and the diagnostic write-ups often go to multiple stakeholders. We can send the same invoice to an on-site manager, an off-site property manager, and an absentee owner if that's how the account is set up. We coordinate this during booking so there's no friction at billing time.