See all articles by accuserv author james memije you’re going to learn a lot from what this contributor has to say. Find the best credit cards for you with which? money compare. A gas boiler installation, usually takes around a day to complete, depending on the property our gas safe engineers, will usually have your heating and hot water back on that day. Dear mcs, i am writing to express my absolute delight at the superb level of care my family received from one of your engineers he was.