Combi vs. System (Which is better?):
System boilers are generally better suited for large homes with multiple bathrooms, as they provide a strong, steady supply of hot water to multiple outlets simultaneously.
Combi boilers are best suited for smaller homes with lower hot water demands, as they save space by not requiring a separate hot water cylinder.
Do system boilers need a cylinder?
Yes. System boilers need a separate hot water storage cylinder, but not a loft cold water tank.
Are system boilers expensive to run?
No, they are efficient. Modern system boilers are condensing models with high efficiency. Running costs depend on usage and insulation, but are cost-effective for high hot water demands.
Do I need a hot water tank with a system boiler?
Yes. A separate hot water cylinder is necessary for a system boiler, as it stores hot water for taps and showers.
Can a system boiler heat both water and radiators simultaneously?
Yes. The system heats radiators while allowing hot water to be drawn from the storage cylinder, maintaining pressure and flow.
How long do system boilers last?
A well-maintained, high-quality system boiler lasts 10 to 15 years.