A system boiler is a compact and highly efficient unit giving all the heating and hot water you need, with significant savings on running and installation costs.

The Greenstar i system boiler incorporates all the major components built-in, including an expansion vessel and circulating pump. All of them pre-wired, pre-plumbed and pre-tested for greater reliability as well as a quicker and neater installation.

A condensing boiler is more efficient due to its ability to extract more heat from the flue gases normally lost to the environment through the flue system. All the Greenstar i System models use the same Aluminium-Silicon heat cell with an extra large surface area. As the flue gases pass through the heat exchanger this extra surface area cools the flue gases to around 55°C whereupon the latent heat within, which would normally be lost to the atmosphere, is instead released and applied to the system.

It is this ability to extract as much heat as possible from the gas it burns that gives the Greenstar i System series an exceptionally high level of operating efficiency.  This higher efficiency is recognised within section L of the Building Regulations, subsequently achieving a higher SAP or NHER rating.

Key features of the Greenstar i System condensing boilers include the separate plate domestic hot water heat exchanger, which is guaranteed for 5 years.* This, combined with the 'keep hot' facility, ensures that hot water is delivered instantly to the tap.

*Subject to conditions

90.1% Energy efficiency rating
Solar compatible
EST Registered
LPG boiler available

genuine one man lift - only 25kg
compact dimensions - siting flexibility
WB3 series heatcell - robust cast aluminium/silicon construction
Heatronic III control system - sophisticated boiler management
compact hydraulic - efficient and reliable
wall mounting frame with pipes behind - no exposed pipework
low NOx and CO2 emissions - environmentally friendly 

DELIVERY IS NORMALLY 3/4 WORKING DAYS.

Please note prices in drop down below exclude VAT.