Gas Boilers come in all sizes, both physically and in terms of output. General Gas will guide you safely through the process of picking the right Gas boiler for your Gas central heating system.
There are three types of domestic Gas boilers and they all range in outputs between 12kw – 40kw.
1- HEAT ONLY GAS BOILERS
Are physically the smallest types of Gas boiler and perfect for tight units like kitchen cabinets,they are also the best option for central heating systems with old pipe work and radiators as they can operate on low pressures.
HOWEVER,unlike modern Gas system boilers they don’t incorporate the safety valve, pump and expansion vessel resulting in longer installation times.
2-SYSTEM GAS BOILERS
Are slightly larger in physical size than heat only Gas boilers but incorporate the pump,vessel and safety valve resulting in a neater more uniform finish and quicker install.
This is the most likely Gas boiler to be used in most Irish homes.
3-COMBI GAS BOILERS
Look identical to system Gas boilers but incorporate a separate plate heat exchanger for hot water demands,eliminating the need for a hot water cylinder in your hot press.
HOWEVER,you will lose the backup of an immersion and with most combi Gas boilers needing a steady non fluctuating high pressure mains water supply,you will most likely need to add an expensive booster pump (depending on your hot water demands).