The OBC requires mechanical rooms to have adequate dimensions for equipment clearance and servicing, combustion air supply for gas-fired equipment, proper ventilation, fire-rated separation from occupied spaces where required, and emergency equipment shutoff capability. Specific requirements depend on the equipment installed and its fuel type.

Building managers should walk through mechanical rooms monthly to check for leaks, unusual noises, warning lights, and general cleanliness. Annual professional inspection of all mechanical room equipment by licensed contractors is also recommended, with boiler/pressure vessel inspections subject to TSSA requirements.

Required safety equipment typically includes carbon monoxide detectors for gas-fired equipment rooms, adequate lighting, emergency equipment shutoffs labeled and accessible, appropriate fire extinguisher, and ventilation adequate for combustion air and personnel safety. Boiler rooms have additional TSSA-specific requirements.

The Ontario Fire Code prohibits storage of combustible materials in rooms containing heating or electrical equipment. Mechanical rooms should be kept clear of all storage — cardboard, cleaning supplies, tools, and equipment spares stored improperly. Anything stored must be non-combustible and must not impede access to equipment or emergency shutoffs.

Gas-fired equipment must be serviced by TSSA-registered contractors. Boiler and pressure vessel work requires TSSA certification. Electrical work requires a licensed electrician. Plumbing work requires a licensed plumber. Building managers can perform visual checks and minor housekeeping, but all mechanical service must be by licensed trades.

The OBC and equipment manufacturers specify minimum clearances around boilers for servicing, combustion air circulation, and safety. TSSA O. Reg. 220/01 governs boiler installations. Clearances vary by boiler size and type — consult the TSSA or a licensed contractor for requirements specific to your equipment.

Keep a mechanical room log book recording every maintenance visit: date, contractor name and licence number, equipment serviced, findings, and work performed. For TSSA-regulated equipment, keep inspection certificates on file. Retain logs for several years minimum.

Warning signs include water on the floor near equipment, rust staining on pipes, unusual odours (gas, burning, mould), warning lights on equipment displays, unusually loud or irregular equipment sounds, steam where there should be none, and evidence of past leaks. Any of these warrant prompt investigation by a qualified contractor.