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Sirius three is our most comprehensive range yet of 15 wall-hung and floor-standing boilers. From major public sector projects, to high-end development, Sirius three has got you covered.

Our Sirius three has one of the lowest NOx ratings on the market, is ErP compliant, highly-efficient and performs to the highest of standards.

With modulation ratios up to 9:1 every boiler delivers flexible, controllable power.

The Sirius three range includes the following products:

With a uniquely broad range of options from 50-250kW, there’s an efficient boiler for every installation; all covered by our 5-year warranty*.

*see terms and conditions

Sirius three WH

Light wall-hung, stainless steel condensing boiler



Dry weight40kg-96kg

Flue connection size80/125 - 110/160

CascadeUp to 700kW

Sirius three FS 50kW - 250kW

Compact floor-standing, stainless steel condensing boiler



Dry weight60kg-232kg

Flue connection size80/125 - 150

CascadeUp to 1MW

Sirius FS 400kW and 525kW

Floor-standing, stainless steel condensing boiler



Dry weight359kg/ 424kg

Flue connection size180

Siriusly exciting

Contact your Area Sales Manager to get a quote for assistance with the Sirius three range.

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