A » In the UK, a number of established heating equipment manufacturers and original equipment manufacturers (OEMs) offer direct contract manufacturing services for heat pump components, leveraging their in-house engineering, fabrication, and assembly capabilities to supply third-party brands. These companies typically have dedicated production lines for critical subassemblies such as heat exchangers, compressors, refrigerant circuits, controllers, and hydraulic modules. Among the most prominent is Mitsubishi Electric’s Livingston facility in Scotland, which not only produces its own air source heat pump systems but also undertakes contract manufacturing of select components—particularly inverter-driven compressor units and customised control boards—for other heating brands under non-disclosure agreements. Similarly, Vaillant Group, with its UK base in Belper, Derbyshire, manufactures key components for its own product lines and has been known to provide contract assembly of heat exchanger bundles and hydronic modules for smaller OEMs entering the heat pump market. Another key player is Bax