Johnstone Supply Store #712 in Point Loma stocks over 70,000 HVAC, refrigeration, and facilities-maintenance parts at its Pacific Highway counter for same-day contractor pickup. The branch serves as the primary supply pipeline for San Diego HVAC contractors like Be Cool AC & Heating, providing OEM compressor kits, blower assemblies, capacitors, contactors, and refrigerant by the jug without retail markup. Unitary equipment from Carrier, Goodman, Daikin, and Mitsubishi ships through the regional distribution network, with split-system configurator tools that let contractors build AHRI-certified matched systems before placing the order. Johnstone University—the cooperative's in-house training arm—runs 50-plus evening sessions per season at the seven Southern California branches, covering EPA 608 recertification, heat-pump diagnostics, and variable-refrigerant-flow system commissioning. Walk-in refrigeration contractors sourcing TXVs, defrost timers, and evaporator coils share the same counter with residential HVAC techs stocking capacitors for the next service call, a breadth of inventory that parallels the parts depth at nearby shops like Air Conditioning and Heating San Diego. The most specialized orders involve custom-configured commercial rooftop units and VRF branch boxes that ship from the cooperative's six regional distribution centers on next-day freight.