These boilers are not pressurized but like the system boilers incorporate a hot water cylinder. The cylinder is fed from a cold water storage tank and there is a separate feed and expansion tank for the heating circuit, both tanks are usually located in the loft space. This is another system that can be used when a greater volume of hot water is required and is more suitable to larger properties with two or more bathrooms.
This is different to a Combi – firstly it has stored water held in either a low-pressure hot water cylinder or a unvented hot water cylinder. Secondly, major components like the pump are built in. The primary system is pressurized, therefore no feed and expansion tank is required resulting in the radiators heating up faster with lower running costs makes this a very economical package. This type of system is installed when a greater volume of hot water is required and is suitable for larger properties with two or more bathrooms.
This has all the benefits of an instantaneous gas water heater and a conventional heating boiler, combined into one compact unit. The main difference is that it does not store any hot water – it heats directly from the incoming mains so no need for a hot water cylinder. This boiler can be installed almost anywhere in the property. (e.g. kitchen, garage or loft) due to new fluing options. Other advantages are no stored water in the loft, therefore no risk of freezing pipes, the hot water is limitless and delivered at mains pressure. No need for a separate shower pump!
The Boiler Blokes takes gas safety seriously. All of our engineers are on the Gas Safe Register and will have their official identity card when you ask to see it.
Gas Safe Register is the official gas safety organisation in Great Britain.
It replaced CORGI on 1st April 2009. Gas Safe Register is responsible for the registration and regulation of gas engineers. Membership is mandatory for any company or engineer working with gas appliances.