frequently asked questions
How can I tell how old my boiler is?Unfortunately, there is no simple way to tell by looking at the boiler. Records should be left when the boiler is installed, so these could be checked to identify the age. If these aren’t available then a qualified heating engineer would also be able to provide an indication of age.
Do I have a regular or combination boiler?
If you have a combination boiler, you won’t have a hot water tank, over-tap electric water heaters or a cold water storage tank, and the boiler will start up every time the hot tap is turned on. Another sign indicating a combination boiler is five pipes (two for heating, two for hot water and one for gas supply) coming out of it.
How can I tell whether I already have a condensing boiler?Look for the flue which will be sticking out through the wall at the back of the boiler. If it is plastic and a white plume puffs out of it when the boiler is on then it is likely to be a condensing boiler.
Should I insulate first or replace my boiler?If your home is poorly insulated, then it is highly recommended to insulate first before installing a new boiler. A well insulated home should always require less heat, and if this is installed after your boiler, then your new boiler is likely to be over-sized, meaning it wont work as efficiently and will have a higher upfront cost.
What size boiler will I need?Boilers should be capable of providing heat for the number of radiators you have in your home, and the size of your property. RES can advise on the recommended size of boiler for your property as part of our free no obligation quote service.
How often should I service my boiler? A boiler should be serviced once a year by a registered competent Gas Safe engineer .