Traditional boiler with cold water tank & hot water cylinder

The advantages of a traditional system are:-
- You have a stored water supply (normally 50 gallons 227 litres).
- You heating system works under a low pressure.
- If you hot water cylinder has an immersion heater (electrically heated) you have hot water back-up, in case the boiler fails.
The dis-advantages are:-
- Poor water pressure on both hot and cold taps, except the cold at the kitchen sink which is main water pressure.
- You heat the water in the hot water cylinder to 60 degrees than may not use it all.
- You have water pipes and cold water storage cistern in the roof which may leak or freeze.