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.

no simple way to tell...
...you wont have a hot water tank…

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.

look for the flue on your boiler
insulate first before installing a new 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.

RES can advise on recommended size
…should be serviced once a year

How often should I service my boiler?

A boiler should be serviced once a year by a registered competent Gas Safe engineer .

simply warmth

simply warmth

Your boiler accounts for up to 70% of what you spend on energy every year. This means replacing your old, inefficient boiler for a modern ‘A’ rated boiler can save up to £490 per year on running costs!

simply insulate

simply insulate

Around a third of all heat lost in a solid wall or non-traditional property is lost through the walls. In such properties cavity wall insulation is not possible so externally insulating is often the best option.

simply renewables

simply renewables

There has never been a better time for homeowners to invest in renewable energy and in particular Solar PV. Not only do homeowners benefit from free, self-generated electricity but any surplus is sold back to the National grid and you get paid for it via the Feed-in Tariff.

Simply survey

simply survey

RES offer impartial energy advice using out experienced and knowledgeable survey and assessment team, all of whom have a wealth of industry experience including external wall insulation, cavity and loft insulation and renewable technologies.

Simply Fix

simply fix

Gone are the days of costly and time consuming timber pattress fittings, an element of the install which can cause time delays and potential install problems. With Simply Fix you can “simply fix” our fittings directly into existing insulation.