Safety is, of course, paramount, so ensure your gas appliances are regularly checked by a gas safe-registered engineer (and consider getting a carbon monoxide detector). Are you looking for trusted boiler repair and installation services in London? As part of our role as a lead local flood authority, we have produced a. Worcester’s controls are designed for combi and system gas and oil boilers, and also regular oil boilers. For help with remodeling or new construction, contact pdq today! Yes,.