• Outputs of 50kW, 60kW, 70kW, 90kW and 110kW making it suitable for a wide range of properties, from large domestic to medium sized commercial premises
  • 9:1 modulation ratio making it extremely energy efficient, saving money and reducing carbon
  • Five year parts and labour warranty* for complete peace of mind
  • Very compact design and reduced weight which is easier to install in smaller spaces; the 50kW and 60kW models are comparable with domestic boilers
  • Weather sensor supplied as standard to manage boiler output according to outside conditions, to help reduce running costs
  • Commissioning by Potterton Commercial engineers and service plans are available to ensure your boiler is working reliably and efficiently

* Terms and conditions apply. Click here for details.

 

Specification

Model  50  60  70  90  110 
Performance Fuel Type  
Output @ 80 / 60oC NG kW 45.1 55 65.1 85.1 102
Output @ 50 / 30oC NG kW 48.6 59.4 70.3 92.2 110.2
Input (Gross) Maximum NG kW 51.4 62.8 74.3 97.0 116.4
Output @ 80 / 60oC LPG kW 45.1 55 65.1 85.1 102
Output @ 50 / 30oC LPG kW 48.6 59.4 70.3 92.2 110.2
Input (Gross) Maximum LPG kW 46.3 56.6 66.9 87.4 104.9
Efficiency Value (%)  
Efficiency @ 80/60oC 100% Load % Gross   87.8 87.6

87.6

87.7 87.6
Efficiency @ 50 / 30oC - 30% Load % Gross   97.1 96.8 96.5 96.9 96.8 
Current Building Reg Part L2 Seasonal Efficiency % Gross   96.6 96.4 96.1  96.6  96.4 
 ErP efficiency rating      A A N/A  N/A 
Gas
Gas Consumption NG  m3/h 4.9  5.98 7.07  9.25  11.1 
Gas Consumption LPG  Kg/h  3.6  4.4  5.2  6.6  7.92 
Inlet Gas Pressure NG-G20  m/bar

20

Inlet Gas Pressure LPG-G33  m/bar 

37

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

Male Thread 

Flue              

Flue Gas Volume @ 80/60oC (NG) 

m3/h@STP 

  67.6  82.6  97.7  127.6  147.2 

Flue Gas Volume @ 50/30oC (NG)

m3/h@STP

  62.8 76.5 90.5 117.7 136.2

Flue Gas Volume @ 80/60oC (LPG)

m3/h@STP

  61.5 75.2 88.9 114.1 139.3

Flue Gas Volume @ 50/30oC (LPG)

m3/h@STP

  57.1 69.6 82.4 105.2 128.9
Max Flue Gas Pressure @ Outlet pa   270 270 270 200 200
Hydraulic              
Water Flow Rate @ 15oC ΔT l/s   0.72 0.88 1.04 1.36 1.63
Water Flow Rate @ 20oC ΔT l/s   0.54 0.66 0.78 1.02 1.22
Hydraulic Resistance @ 15oC ΔT kPa   85 92 45 35 36
Hydraulic Resistance @ 20oC ΔT kPa   48 55 30 22 22
Water Content Litres   4 5 6 9 10
Flow & Return Connection Size inch   1" 1" 1" 1.5" 1.5"
Flow & Return Connection Type  

Male Thread

Flue Connection Size mm   80/125 80/125 80/125 110/160 110/160
Max Boiler Operating Pressure bar  

4

Min Boiler Operating Pressure bar  

1

Maximum Flow Temperature oC  

80

General              
Appliance Dry Weight Kg   40 40 50 83 93
Dimension W x D x H mm   450 x 377 x 763 450 x 377 x 763 450 x 505 x 763 600 x 584 x 952 600 x 584 x 952
NOx Level (Dry @ 0% O2) mg/kWh    29.8 34.1 34.8 36.5 24.7
CO2 Content - Natural Gas %   8.5 - 9 9 8.5 - 9 8.5 - 9 9 - 9.2
CO2 Content - LPG %   9.5 - 10 9.4 - 10.1 9.5 - 10 9.9 - 10 9.5 - 10
Noise Levels @ 1 metre from unit dB(A)   48.6 47.5 48.5 49.5 48.8
High Level Ventilation* (BS 6644) cm2   93 113 134 175 210
Low Level Ventilation* (BS 6644) cm2   185 226 268 350 420 
Electrical              
Power consumption W   80 95 95 130 165
Nominal supply voltage V / Hz  

230 v 1 Ph 50 Hz Δ

wall boiler dimensions

Dimensions and clearance measurements for all models of the Sirius two 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.

 

 

Dimensions

Sirius two WH 50 60 70 90 110
A Width 450 450 450 600 600
B Height 766 766 766 952 952
C Depth 377 377 505 584 584

Clearances

 

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

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

Find out more about the Sirius WH 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. You can find their details here.

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.

  • Sirius two WH 60kW ErP label (0.58MB, 29/09/2015)
  • Sirius two WH 70kW ErP label (0.58MB, 29/09/2015)
  • Sirius two WH product fiche (0.06MB, 06/08/2015)
  • Sirius two WH technical parameter sheet (0.06MB, 06/08/2015)
  • Sirius two WH 50kW ErP label (0.58MB, 06/08/2015)
  • More Potterton Commercial boilers

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