• 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.

View product specification

When clicked this will open the product specification in PDF format.

 

Specification
Model  50  70  90  110 
Performance Fuel Type  
Output @ 80 / 60oC NG kW 45.1 65.1 85.1 102
Output @ 50 / 30oC NG kW 48.6 70.3 92.2 110.2
Input (Gross) Maximum NG kW 51.4 74.3 97 116.4
Output @ 80 / 60oC LPG kW 45.1 65.1 85.1 102
Output @ 50 / 30oC LPG kW 48.6 70.3 92.2 110.2
Input (LPG) Maximum LPG kW 51.4 74.3 97 116.4
Efficiency Value (%)  
Efficiency @ 80/60oC 100% Load % Gross   87.8 87.6 87.7 87.6
Efficiency @ 30% Load % Gross   97.1 96.8 96.9 96.8
Current Building Reg Part L2 Seasonal Efficiency % Gross   96.6 96.4 96.8 96.4
 ErP efficiency rating A A N/A N/A
Gas
Gas Consumption NG  m3/h 4.9 7.07 9.25 11.1
Gas Consumption LPG  Kg/h  3.59  5.19 6.79 8.15
Inlet Gas Pressure NG-G20  m/bar

20

Inlet Gas Pressure LPG-G31  m/bar 

37

Gas Connection Size inch  0.75"  0.75"  1"  1" 
Gas Connection Type    

Male Thread 

Flue            

Flue Gas Volume @ 80/60oC (NG)

m3/h@STP

  67.6 97.7 127.6 147.2

Flue Gas Volume @ 50/30oC (NG)

m3/h@STP

  62.8  90.5  117.7 136.2

Flue Gas Volume @ 80/60oC (LPG)

m3/h@STP

  61.5  88.9  114.1  139.3 

Flue Gas Volume @ 50/30oC (LPG)

m3/h@STP 

  57.1  82.4  105.2  128.9 
Max Flue Gas Pressure @ Outlet (B23)  pa  

200 

Hydraulic            
Water Flow Rate @ 15oC ΔT l/s   0.72 1.04 1.36 1.63
Water Flow Rate @ 20oC ΔT l/s   0.54 0.78 1.02 1.22
Hydraulic Resistance @ 15oC ΔT kPa   94 52 40 40
Hydraulic Resistance @ 20oC ΔT kPa   54 32 22 22
Water Content Litres   3 5 9 10
Flow & Return Connection Size inch   1" 1" 1.5" 1.5"
Flow & Return Connection Type  

Male Thread

Flue Connection Size mm   80/125 80/125 110/160 (100/150) 110/160 (100/150)
Max Boiler Operating Pressure bar  

4

Min Boiler Operating Pressure bar  

1

Maximum Flow Temperature oC  

80

General            
Appliance Dry Weight Kg   60 70 104 109
Dimension W x D x H mm   600 x 681 x 905 600 x 681 x 905 600 x 681 x 1222 600 x 681 x 1222
NOx Level (Dry @ 0% O2) mg/kWh    29.8 34.8 39.5 24.7
CO2 Content - Natural Gas %   8.5 - 9 8.5 - 9 8.5 - 9 9 - 9.2
CO2 Content - LPG %   9.5 - 10 9.5 - 10 9.9 - 10 9.5 - 10
High Level Ventilation* (BS 6644) cm2   93 134 175 210
Low Level Ventilation* (BS 6644) cm2   185 268 350 418
Electrical            
Power consumption (with pump) W   100 117 146 185
Nominal supply voltage V / Hz  

230 v 1 Ph 50 Hz

 

Sirius FS 50kW - 110kW DimensionsDimensions 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.

 

Dimensions

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 

Clearances

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 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.

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