Seven firms — two mechanical-and-electrical integrators (RefCo, 1998; C8, 2016), two commercial-refrigeration specialists (Sarnia, Bailiwick), two air-conditioning shops (Alpha, CDM Air), and Vent, the island's only ductwork manufacturer, working to DW/144 and TR19. Four are limited companies; St Sampson and St Martin each hold two. —
Five firms — two refrigeration-led, one full mechanical-and-electrical contractor, one Daikin-certified specialist, one owner-operator.
Three refrigeration firms — Alpha (2002) Daikin- and Refcom-certified, Sarnia for catering kit, Bailiwick for medical and marine.
Two St Martin firms — Vent, an employee-owned ductwork specialist to DW/144 and TR19, and C8, a full-service M&E contractor since 2016.
One firm per niche, picked for editorial depth.
Owner-operated M&E business; SSAIB certified for intruder alarms
Daikin and Refcom Certified; 24-hour air conditioning, heating, refrigeration
Mechanical and electrical contractor; HVAC, plumbing, electrical, security