Siriusly exciting.

Our efficient new 50-250kW range launches September 2018.

Find out more about the Sirius three range
Sirius 3
Output Dry weight Dimensions (WxHxD) Flue connection size ErP
50kW 60kg 600x681x905mm 80/125 A
70kW 70kg 600x681x905mm 80/125 A
90kW 104kg 600x681x1222mm 110/160 (100/150) N/A
110kW 109kg 600x681x1222mm 110/160 (100/150) N/A
Up to 440kW n/a


  • Features & Benefits
  • Specifications
  • Dimensions
  • Literature
  • Case studies
  • BIM
  • CAD
  • Enquiry
  • Energy Labelling
  • Efficiency up to 96.6% makes maximum use of the energy it uses, making it very cost effective 
  • Stainless steel heat exchanger designed for maximum combustion performance and energy efficiency
  • 9:1 modulation ratio for extreme energy efficiency and carbon reduction
  • Five year parts and labour warranty* for complete peace of mind
  • Compact design and easy to install
  • Designed for maximum combustion performance and energy efficiency
  • Can be used as a replacement for boilers in living spaces
  • Compatible with renewables as controls can be programmed to work with solar thermal, biomass and buffer tanks

* Terms and conditions apply. Click here for details.

Dimensions and clearance measurements for all models of the Sirius two FS 50kW - 100kW are featured in the tables below.

If you can't find the information you are looking for, you may find it within the product literature.

If you would like to speak to your local Area Sales Manager, please complete the online form within the enquiry tab.


Sirius two FS 50  70  90  110 
A Width  600 600 600  600 
B Height 848 848  1127  1127 
C Depth 681 681  681  681 



Sirius two FS 50  70  90  110 
1 Front 1000 1000  1000  1000 
2 L Hand 500 500 500  500 
3 Top 250 250  250  250 
4 Back 320 320  500  500 
5 R Hand 500 500 500  500 

Learn more about the Sirius FS by downloading our product literature.

Find out more about the Sirius two FS 50kW - 110kW by reading the case studies below.

Download your Building Information Modeling (BIM) file(s) for this product.

Download CAD files for this product using the links below. To access CAD files you will need the correct software installed to allow you to open .dwg files such as AutoCAD

Interested in this product for your premises? Complete the form below and someone from the team will contact you shortly.

Alternatively, speak to your Area Sales Managers about this or any of our products.

Send Sirius two FS 50kW - 110kW enquiry

Can't find the product label or fiche you require below? Try our online calculation tool which allows you to create and download one for a completed system or package installation.