Heat-Only vs System Boiler — What Is the Difference?
CANRO Heating & Cooling provides expert advice on this common question for homeowners in Greater Vancouver. If you need professional service, our licensed technicians are available across the region.
Related Services from CANRO
CANRO Heating & Cooling provides comprehensive boiler service across Greater Vancouver, including diagnostic inspections, emergency repairs, scheduled maintenance, and system replacement. Our Red Seal certified technicians service all major brands and carry OEM parts in their vehicles. For emergency service related to this question, call (604) 359-1081.
When to Call a Professional for Help
While understanding the answer to this question is helpful, some situations require professional expertise. If you are uncertain about any step, if the problem recurs, or if you notice any signs of gas odour, carbon monoxide, or electrical hazards, contact CANRO Heating & Cooling immediately. Our licensed technicians across Greater Vancouver can provide expert diagnosis and repair. We recommend professional service for any issue that involves gas, electrical components, or safety-critical systems.
Answer: Heat-Only vs System Boiler — What Is the Difference?
A heat-only (conventional) boiler requires a cold water tank in the attic and a hot water cylinder. A system boiler has the pump and expansion vessel built in and uses a hot water cylinder but no attic tank. System boilers are more compact and easier to install. Combi boilers combine both in one unit with no tanks or cylinders.
Safety Reminder
If you smell gas, suspect carbon monoxide or believe there is an immediate danger, leave the property and contact emergency services or the appropriate gas emergency authority. Do not remain inside — exit the building immediately and call for help from outside.