So whether you have a gas fire that needs servicing, old boiler that needs repairing, or in need of a new, a-rated condensing boiler- then we are here to go the extra mile for you and your family! Detection of vermin / rat infestation within the drainage system. Did you know that by replacing your old boiler with a new condensing boiler you could save up to % on heating bills? you could save even more with the correct controls! Stay safe and make sure your.