There are a number of companies today that manufacture magnetic filter systems for the home. They are easily fitted within the central heating system – generally close to the boiler – and work to remove suspended iron oxide from the system. Many say they make your boiler more energy efficient while others say they are just a gimmick to get money from energy conscious home owners – so which one is it?

What do magnetic filters do exactly?

As the various metals in your central heating system become corroded by the water supply, the suspended black iron oxide that forms over time can turn to a sludge. This sludge then settles in the pipe work and in the boiler itself and reduces the efficiency of the entire system. By adding a magnetic filter, you can take out virtually all of the black iron oxide from the system and as more forms it is also filtered out – before it has time to settle and become a problem.

Do they work?

Plenty of manufacturers and installers say yes but of course there is always one that says no. As it is the magnetic filters that are currently on the market have been proved to remove over 95% of the suspended black iron oxide from both new and existing central heating systems. Most offer guaranteed protection from the sludge problem and improved central heating system performance and efficiency, and as we all know an efficient system reduces energy consumption and saves money.

What is available?

At present magnet filters exist for all domestic systems and a number of industrial applications and all of them are easy to install, service and maintain. You can choose the simple magnetic filter which only removes the black iron oxide sludge or if you want even better efficiency some manufacturers sell dual filters that also remove non-magnetic debris from the circulating water. The cleaner your water is as it passes through the system the more efficient your boiler and radiators will be and this is great for your pocket.

What is the cost?

Once you’ve paid for the actual magnetic filter, there are no ongoing running costs to speak of. You do have to have the filter cleaned from time to time and although it is advisable to get a professional in you can have a go yourself if you’re feeling confident. So what do they cost? This depends on the size and model you get but on average the simple magnetic filters cost from £75-£120 while the dual filters obviously cost a bit more. This may sound like a big investment for a filter but if it prolongs the life of your boiler by a good few years then it’s more than worth it in my opinion.

Are the actually energy savers though?

Well the magnetic filters available today do make your central heating system more efficient from the word go and in the long run this can only save you money. It may take a few years to recoup your investment but every year after that is money in your pocket.

Guest Article by Clare Lynock