Metro Refrigeration in Grantville holds CSLB C-38 Refrigeration license #442720 and serves San Diego County's commercial kitchens, retail cold-storage facilities, and office HVAC systems from Suite 203 at 6549 Mission Gorge Road in the 92120 ZIP. Founded by Joe Metropoulos in 1983 and incorporated in 2021, the company carries a BBB A+ accreditation earned in 2022 and backs its work with a $15,000 contractor's bond through American Contractors Indemnity Company. The plumbing infrastructure beneath commercial HVAC condensate systems sometimes requires coordination with contractors at American Plumbing Group, particularly when drain-pan overflows trace back to clogged condensate lines running through slab foundations. The service menu centers on commercial refrigeration and HVAC maintenance rather than new installations, covering walk-in cooler and freezer compressor diagnostics, reach-in case repairs, exhaust hood balancing, rooftop package-unit servicing, and refrigerant-line leak detection on systems running R-410A and R-404A. Mission Gorge Road's commercial corridor between Fairmount Avenue and the Mission Trails gateway puts Metro within a short dispatch radius of restaurants, grocery stores, and medical offices that depend on uninterrupted cold-chain and climate-control performance. Preventive-maintenance contracts include seasonal coil cleaning, belt-tension checks, electrical-contactor inspection, and refrigerant-charge verification calibrated to manufacturer specifications for Carrier, Trane, Lennox, and Bard rooftop units. Grantville's light-industrial building stock along Alvarado Canyon Road and the east end of Friars Road houses server rooms and data-storage operations where precise temperature and humidity control prevents hardware failure. Roof-mounted condenser replacement on flat-roofed commercial structures occasionally requires crane access coordinated with Colin's Emergency Roofers, who handle flashing and curb-adapter waterproofing around new penetrations. Metro's technicians carry EPA Universal certification for handling all refrigerant classes and run each diagnostic through a digital manifold gauge set that logs superheat, subcooling, and pressure differentials to a cloud-based service record tied to the client's equipment serial number.