There are many reasons why heating systems have poor performance. Some reasons include air in the system, the system not balanced properly, incorrect piping on installation or when changes were made to the system e.g. an extra radiator etc. or sludge in the system.
We will vent your radiators when we service your boiler to get air out of them and we can advise you on any changes in piping that may be required.
Sludge deposits in a large percentage of older systems can affect the efficiency of boilers and heating systems. Many heating systems were not originally chemically protected with corrosion inhibitors and this has led to radiators not heating properly and needing to be vented very regularly, water leaks etc. A small investment in chemical flushing your system can lead to significant improvements in efficiency and comfort in your home.