Send message
Ask a question
List of suppliers/where can I buy
Sample request
I have read and agree to the terms and conditions of usage and The Building Centre's Privacy Policy. Your request will be sent and shared to the selected manufacturers you submit a request to.

Find products

Use our product finder to search for products and materials

Subscribe to our newsletter to receive news about events and exhibitions, innovation and materials on the latest building product innovations, case studies and more.
I have read and agree to the terms and conditions of usage and The Building Centre's Privacy Policy.

Sirius three FS 50kW-250kW

Potterton Commercial
  • Outputs of 50kW, 70 kW, 90 kW, 110kW, 130kW, 150kW, 200kW and 250kW, making it suitable for a wide range of commercial applications
  • Wide 9:1 modulation ratio reducing constant on/off cycling to improve efficiency and boiler longevity
  • A gross seasonal efficiency of up to 97.5% reduces energy consumption
  • 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
  • Programmable to work with solar thermal, biomass and buffer tanks, for a sustainable, energy efficient solution across the complete range
  • Suitable for LPG conversion; LPG conversion kits are available for off-grid applications
  • Lightweight stainless steel heat exchanger for reliable and energy efficient heat transfer
  • Integrated Low Loss Headers and Plate Heat Exchangers (available as options) are easier to install and offer a professional finish and reduced footprint
  • A very compact design, with casters on the bottom of larger output boilers. Boilers will pass through 700mm doors and are easier to position when space is at a premium
  • 1" flow and return connections (50-70kW) avoids major pipework modification
  • An integrated Cascade function allows up to 16 boilers to be managed by the Siemens controller
  • 0-10 volt connection provides a quick and simple interface with BMS
  • Weather compensation functionality reduces operation costs
  • A low NOx of under 24.6mg/kW minimises impact on the environment
  • ErP compliant, reducing carbon emissions and improving efficiencies in support of government targets
  • Certified for the ETL*, part of the Enhanced Capital Allowance (ECA) tax scheme for businesses
  • Five year parts and labour warranty** for complete peace of mind

At this link you can find all the technical information:


Find products