With energy efficient boilers from as little as 50p per day, basi heating really does make having a new replacement boiler installed more affordable. See the full range of worcester bosch boilers we offer, many of them given the which? best buy seal of approval. Air pollution, noise, dangerous trees, animals & pests, abandoned vehicles, littering, graffiti, anti-social behaviour. Boilers are designed to last an average of 15 years high-quality.