Technical data
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A highly effective solution from the brand you can trust
The Worcester Greenstar System Filter has been specifically 
designed to combat the damaging effects of system debris 
and pollutants, allowing homeowners to protect their boiler 
or heat pump for a fraction of its cost. The filter is suitable 
for 22mm piped heating systems.
At the centre of this innovative design is a highly powerful 
magnet that removes the magnetic debris (magnetite) that 
is present in the heating system water. The central location 
of the magnet ensures that magnetite is collected quickly 
and retained, maximising the overall protection. Any 
non-magnetic debris is caught by the twin-action cyclonic 
trap, a proven technology that offers a capacity to collect up 
to 200g of magnetite a year. 
The Greenstar System Filter has been extensively 
tested in simulated systems, proving its effectiveness 
in removing: iron oxide, magnetite, limescale particles, 
casting sand, welding debris, non-magnetic metal flakes, 
paint particles and other system pollutants. 
Installation 
The filter can be installed almost anywhere in a heating 
system, however to maximise the effectiveness it should be 
placed before the boiler and after the last radiator.
The Worcester Greenstar System Filter
Modern condensing boilers are precision engineered and 
designed to run with a clean water heating system. Over 
time, dirty system water will damage a boiler and its 
components, causing failures and shortening the life of the 
overall system. 
Damaged boiler and system components
•
  Blockages in primary heat exchanger
•
  Increased wear on pumps
•
  Blocked valves.
 Reduced efficiency
•
  Energy efficiency loss equivalent to a boiler being  
reduced from A rated efficiency to D rated, resulting  
in fuel wastage
•
  Blocked radiators can reduce efficiency and 
heating comfort. 
The Greenstar System Filter is easy to install and service
Heat exchanger damaged by system debris and pollutants
A thermal graphic of a 
blocked radiator
Debris in the system blocks the 
efficient flow of water around 
the system, thus affecting the 
radiator’s heat distribution. 










