Potterton Ultra System

The Potterton Ultra System range of boilers are efficient, compact and lightweight ideal for new build properties

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Suitable for

Social Housing

New Builds

Single boiler outputs
12kW, 15kW, 18kW, 24kW and 28kW

Lightweight and compact
Making it easy to install

Industry leading choice of flue lengths
Allows for versatile siting anywhere in the home


The Potterton Ultra System boiler is available in outputs of 12kW, 15kW, 18kW, 24kW and 28kW meaning there is an output available for a wide range of property sizes. Combined with its industry leading choice of flue lengths for versatile siting, the Potterton Ultra System is the ideal boiler for new build properties.

The pipework can be pre-installed using the pre-plumbing jig and the boiler added later once the property is occupied, providing installers with more flexibility. The lightweight and compact boiler design is easy to handle and install, while the front access allows for easy maintenance and repair if required in future.

Register a Potterton Ultra System boiler online

Terms and conditions apply

Please note: warranty and purchasing information on this site applies to the UK only. For information on how to buy these products in the Republic of Ireland, please visit Baxi Potterton Myson.

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  • 2 Year Warranty* - for peace of mind (*terms and conditions apply. Please visit baxi.co.uk/warranty)
  • 12kW, 15kW, 18kW, 24kW and 28kW outputs - offering a model to suit most property sizes
  • Fully modulating and highly efficient boiler - intelligently uses the right amount of fuel to meet the set central heating temperatures, saving money on fuel bills
  • Compatible with Multifit GasSaver - can give savings of up to 37% on gas for domestic hot water
  • Compatible with Megaflo Eco Solar Cylinder - providing great fuel savings for hot water
  • Pre-plumbing jig - pipework can be pre-installed and the boiler added when the property is occupied
  • Flueing options of up to 20m - allowing for versatile siting anywhere in the home
  • NOx 5 - best in class Complies with the Code for Sustainable Homes
  • Robust hydraulic connections - offer assurance of quality and reliability

 Potterton Ultra System

           
   Units     12   15  18  21  24
 Condensing boiler  Yes/ no  Yes Yes  Yes  Yes  Yes 
 Low temperature boiler  Yes/ no  No No  No  No  No 
 B1 boiler  Yes/ no  No No  No  No  No
 Cogeneration space heater  Yes/ no  No No  No  No  No 
 Combination heater  Yes/ no  No No  No  No  No 
 User adjustable CH temperature  25°C to 80°C Yes Yes  Yes  Yes Yes
 

Gas

           
 SAP 2009 annual efficiency (SEDBUK) NG models  %  89 89  89  89  89 
 SAP 2009 annual efficiency (SEDBUK) LPG models  %  91  91 91  91  91 
 NOx class (5 being the lowest)  1-5  5 5

ErP product information

         
 NOx  mg/kWh  21 21  26  16  16 
 Sound power level, indoors  LWA dB  52 49  49  52  53 
 Space heating energy efficiency           %      93  93 93  93  93 
 Useful efficiency at rated heat output and
 high temperature regime (n4)
 %  88.1  88 88  87.9  87.9 
 Useful efficiency at 30% of rated heat output and 
 low temperature regime
 %  98.1 98.1  98.1  98  98 
 Heat input CH  kW max gross (QnHs)  13.3 16.7 20  26.6 31.1 
   kW min gross (QnHs)  2.33 2.44  2.88  3.88  4.54 
 Heat output CH (non condensing)  kW max (Pn)  12 15  18  24  28 
   kW min (Pn)  2 2.1  2.5  3.4  4
 Heat output CH (condensing)  kW max (Pnc)  12.7 15.9  19  25.4  29.6 
   kW min (Pnc)  2.2 2.3  2.8  3.7  4.3 
 Injector           (mm)     3     3.3 3.6  4.4  4.6
 Gas supply pipe size  (mm)  22 22  22  22  22 
 Inlet supply pressure (natural gas)  mbar  20  20 20  20  20 
 Inlet supply pressure (LPG)  mbar  37 37  37  37  37 
 Maximum gas rate (NG)  m3/hr  1.27  1.59 1.9  2.54  2.96 
 Maximum gas rate (LPG)  kg/h  0.93 1.17  1.40  1.86  2.18 

 Electrical

           
 Electrical supply  Volts/Hz  230V/50Hz 230V/50Hz  230V/50Hz  230V/50Hz  230V/50Hz 
 Earthed supply required  Yes/ no  Yes Yes  Yes  Yes  Yes 
 Power consumption  Watts  75 80  80  85  90 
 External fuse rating  Amps  3
 Internal fuse rating    F2L F2L  F2L  F2L  F2L 
 Boiler IP rating (electrical protection)  Approval category  IPX5D IPX5D  IPX5D  IPX5D  IPX5D 

 Mechanical and hydraulic

           
 Flow / return pipe size  (mm)  22 22  22  22  22 
 Condensate discharge pipe size  (mm)  21.5 21.5  21.5  21.5  21.5 
 Cold water inlet  (mm)   15 15  15  15  15 
 Hot water outlet  (mm)  15 15 15  15  15 
 Pressure relief discharge     (mm)  15 15  15  15  15 

 Concentric flue systems

           
 Standard telescopic concentric flue  Length in mm  315-500 315-500  315-500  315-500  315-500 
 Horizontal concentric (60/100mm)  Max equivalent length (m)  10  10  10 10  10 
   Reduction per 135°C bend (m)  0.5  0.5 0.5  0.5  0.5 
   Reduction per 93°C bend (m)  1  1
 Horizontal concentric (80/125mm)  Max equivalent length (m)  20  20 20  20  20 
 

Weight

           
 Installation lift weight  (kg) 32.5  32.5  32.5  32.5  33
 Packaged boiler carton weight  (kg) 36.5   36.5  36.5  36.5  37

 Dimensions

           
 Casing height  (mm)  700  700 700  700  700 
 Casing width  (mm)  390  390 390  390  390 
 Casing depth  (mm)  300  300 300  300  300 
 Flue terminal - diameter/projection  (mm)  100/125  100/125 100/125  100/125  100/125 
 Overall height inc flue elbow  (mm)  860  860 860  860  860 

 Clearances

           
 Above casing  min (mm)  175  175 175  175  175 
 Below casing  min (mm)  170  170 170  170  170 
 Front (for servicing)  min (mm)  450  450 450  450  450 
 Front (in operation)  min (mm)  5  5
 Left hand side  min (mm)  5 5
 Right hand side  min (mm)  5

 Consumption

           
 Auxiliary electricity consumption - full load  elmax (kW)  0.030 0.030  0.030  0.042  0.047
 Auxiliary electricity consumption - part load  elmin (kW)  0.013 0.013 0.013  0.013  0.013 
 Auxiliary electricity consumption - standby mode  Psb (kW)  0.003 0.003  0.003  0.003  0.003 
 Standby heat loss      Pstby (kW)  0.035 0.035  0.035  0.035  0.040 
 Annual energy consumption   QHE (kWh/GJ)  10278/37 12778/46 15556/56  20556/74  24167/87 

 Central heating primary circuit pressures

           
 Safety discharge  bar 3.0  3.0 3.0  3.0  3.0 
 Max operating  bar 2.5 2.5 2.5  2.5  2.5 
 Min operating  bar 0.5 0.5 0.5 0.5  0.5 
 Recommended operating range  bar 1-2 1-2 1-2 1-2  1-2 

 Expansion vessel

           
 Min pre-charge pressure     bar  1.0  1.0 1.0  1.0  1.0 
 Max capacity of CH system  litre  100  100 100  100  100 
 Primary water content of boiler (unpressurised)  litre  2.5  2.5 2.5  2.5  2.5 

Ultra System product literature

Potterton Ultra System User Guide updated 30/06/2017 (2.58MB) Potterton Ultra System Installation and Servicing Manual updated 30/06/2017 (16.55MB)

The following accessories and controls are compatible with the Potterton Ultra System. To find out more, visit our Accessories and Controls page

  • EP2 programmer

Ultra System ErP labels

Potterton System Ultra ERP Package Label updated 30/06/2017 (0.32MB) Potterton Ultra System ERP Label updated 30/06/2017 (0.13MB)

Support from Potterton

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