Siriusly exciting.

Introducing the efficient new 50-250kW Sirius three range.

Find out more about the Sirius three range
Sirius 3
Output Dry weight Dimensions (WxDxH) Flue connection size ErP
50kW 40kg 450x377x763mm 80/125 A
60kW 40kg 450x377x763mm 80/125 A
70kW 50kg 450x505x763mm 80/125 A
90kW 83kg 600x584x952mm 110/160 N/A
110kW 93kg 600x584x952mm 110/160 N/A
130kW 93kg 600x584x952mm
150kW 96kg 600x584x952mm
Up to 700kW n/a


  • Features & Benefits
  • Specifications
  • Dimensions
  • Literature
  • Case studies
  • BIM
  • CAD
  • Enquiry
  • Energy Labelling
  • Outputs of 50kW, 60kW, 70kW, 90kW, 110kW, 130kW and 150kW making it suitable for a wide range of commercial applications
  • Lightweight stainless steel heat exchanger for reliable and energy efficient heat transfer
  • Wide 9:1 modulation ratio reducing constant on/off cycling to improve efficiency and boiler longevity 
  • A gross seasonal efficiency of up to 97.3% reduces energy consumption
  • A low NOx from 17mg/kW minimises impact on the environment
  • Supplied with the latest Siemens controls with state of the art PCB, offering improved control options
  • The QA75 Twist Knob Controller has a simple descriptive display and easy to use advanced programming functions
  • 0-10 volt connection provides a quick and simple interface with BMS
  • An integrated Cascade function allows up to 16 boilers to be managed by the Siemens controller
  • Its very compact design offers both 130kW and 150kW outputs within the same footprint as 110kW
  • 1" flow and return connections (50-70kW) avoids major pipework modification
  • Programmable to work with solar thermal, biomass and buffer tanks, for a sustainable, energy efficient solution across the complete range
  • Commissioning by Potterton Commercial engineers and service plans are available to ensure your boiler is working reliably and efficiently
  • Five year parts and labour warranty* for complete peace of mind 

* Terms and conditions apply. Click here for details.

View product specification

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Dimensions and clearance measurements for all models of the Sirius three WH 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 three WH 50 60 70 90 110  130 150 
A Width 450 450 450 600 600 600 600 
B Height 763 763 763 952 952 952 952 
C Depth 377 377 505 584 584 584 584 



Sirius three WH 50 60 70 90 110  130 150 
1 Bottom 500 500 500 500 500 500 500 
2 L hand 20 20 20 20 20 20 20 
3 Front 400 400 550 600 600 600  600 
4 R Hand 20 20 20 20 20 20 20 
5 Top 300 300 300 400 400 400 400 

Download your Building Information Modeling (BIM) object(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? Speak to your Area Sales Managers about this or any of our products.

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