Range from the cheapest fitting of a boiler magnetic filter £30 (1981 based in SR3) to the dearest fitting of a boiler magnetic filter £120 (Thermoheat based in DH6).
Comparing heating engineers estimates for fitting a magnetic filter gives you an idea of who will be better value but the best way to compare costs is to get actual quotes.
What to do - Get rates and quotes to connect a magnetic filter in DH5 by posting a job with HaMuch and we will send it to heating engineers in DH5.