Almost any combi boiler manufactured today is built to meet the highest efficiency standards moving to an a-rated combi boiler from a g-rated model has been known to save upwards of £ a year from your heating bill, so being efficient really can pay! Baxi boiler fan in 'as new' condition only been installed in boiler for weeks. Thanks for printing! don't forget to come back to cross and sons plumbing for fresh articles! Our two-man teams can attend your premises.