You don’t want a loud and noisy, inefficient boiler system. You should also realise that by having your boiler system power flushed, you really are helping it to stay running without breaking down. Speeding up the radiator convection is also important and part of what you can count on when you have your boiler system power flushed. Now, power flushing isn’t something that is done annually. There are other maintenance issues that need to be attended to annually.