We're the only company to actually call back after your installation to carry out a quality check and make sure you're fully satisfied with the job we will also spend some time helping you get to grips with your new boiler and hot water controls. Great customer service! very trustworthy people!! If you are unsure as to which type of survey you require. Smart controls can help with that in fact, you could increase your boiler’s efficiency by an extra %! pretty nifty, eh? Are you dissatisfied.