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Potterton Assure Combi

The Potterton Assure Combi range of boilers are efficient and lightweight ideal for most social housing and new build properties. Contact your local Business Development Manager to find out more.

Suitable for


Social Housing


New Builds

Assure Combi product image

Single boiler output
25kW, 30kW, 36kW

Installer lift weight
From 29kg

No special tools required
Easy to service

With many smart features, including front access components and a compact cupboard fit, the Potterton Assure Combi makes installation and maintenance quicker, easier and more efficient.
Available in 25kW, 30kW and 36kW, as well as 25kW and 30kW Combi LPG, the Potterton Assure Combi is easy to install and can be fitted in most social housing and new build properties.

Designed for social housing and new build, the Potterton Assure Combi saves you money and time by using the right amount of fuel to meet the set central heating temperatures and not requiring any special tools or replacement seals for a standard service.

To register a Potterton Assure Combi, click here

  • Energy Saving Trust Endorsed
  • Outputs: 25kW, 30kW and 36kW to suit most property sizes
  • 25kW and 30kW Combi LPG options, suitable for off the mains gas supply
  • 36kW output provides a higher hot water flow rate of 15l/min at 35ºC for larger properties
  • Compact cupboard fit means it can be installed discreetly in a 290mm deep cupboard
  • Built in stand off frame within boiler casing, complete with pipe spacing bracket
  • Lightweight from 29kg lift weight, for ease of installation
  • Vertical packaging allows for ease of access to all installation components, from the top of the packaging
  • Front access to all components saves time when servicing, allowing for ease of maintenance and repair
  • 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
  • No special tools or replacement seals required for standard service
  • Built in drip tray provides protection against water ingress in extreme weather conditions
  • Compatible with Baxi uSense, enabling heating to be controlled from your smart phone or tablet
  • IFOS optional outdoor weather sensor enhances system control and customer comfort and complies with Boiler Plus
  • Central flue for ease of siting
  • Industry leading choice of flue lengths, bends and accessories, for maximum sitting flexibility
  • Permanent filling link supplied as standard, for ease of topping up the system
  • Whisper quiet operation means it can be installed within living areas, without causing disturbance to end users
  • Comes with a 2 year warranty* for extra peace of mind

 *Subject to registration and annual service. Terms and conditions apply. 

Potterton Assure Combi 


Units  25  30  36 25 LPG  30 LPG 
Sales code 7658129 7658130 7692619 7703806 7703807


Reset button   Yes   Yes   Yes Yes Yes
User adjustable DHW temperature    Yes   Yes   Yes Yes Yes
User adjustable CH temperature    Yes   Yes   Yes Yes Yes
LCD temp/status/fault diagnosis display    Yes   Yes   Yes Yes Yes


Natural gas Yes Yes Yes Yes  Yes 
Nominal inlet supply pressure mbar 20  20  20 37 37
Maximum gas rate  m3/hr  2.71 3.26  3.81 -
Maximum LPG gas rate  kg/hr  - - 1.98 2.38
Propane LPG   No  No  No  Yes  Yes   
Heat input central heating (CH)  kW Max Gross (QnHs)  22.86 28.58 28.58  22.86  28.58 
kW Min Gross (QnHs)  6.87  6.87  7.4  6.87  6.87 
Heat output CH non-condensing  kW Max (Pn)  20.00 25.00  25.00  20.00  25.00 
kW min (Pn)  6.20 6.20  6.70  6.20  6.20 
Heat output CH condensing  kW max (Pnc)  21.16 26.33 26.33  21.16  26.33 
kW min (Pnc)  6.70 6.70 6.70  6.70  6.70 
Heat input domestic hot water  kW Max Gross (QnwHs)  28.6 34.3 40.8  28.6  34.3 
Heat output domestic hot water  kW Max (Pn)  25 30 36  25  30 

ErP product information 

NOx  mg/kWh  31 31 39  31  31 
Space heating efficiency class   
Water heating declared load profile    XL  XL  XL  XL  XL 
Water heating efficiency class   
Seasonal space heating energy efficiency  93  93  93  93  93 
Sound power level, indoors  LwadB  48 51  51  48  51 


Electrical supply  Volts/Hz  230/50  230/50  230/50  230/50  230/50 
Permanent live required  Yes  Yes  Yes  Yes  Yes 
Fitting electrical cable    No No No  No  No 
Power consumption  Watts  100 100 100  100  100 
External fuse rating  Amps 
Internal fuse rating  Amps  F2AH250V F2AH250V F2AH250V  F2AH250V  F2AH250V
Ingress protection rating    IPX5D  IPX5D  IPX5D  IPX5D  IPX5D 
Integral 'boiler only' frost thermostat    Yes  Yes  Yes  Yes  Yes 


Pre-plumbing/wall mounting jig (optional accessory)   Optional   Optional   Optional  Optional  Optional 
Isolating valves    Yes   Yes   Yes  Yes  Yes 
Gas supply connection  mm  22  22  22  22  22 
Central heating connections  mm  22  22  22  22  22 
Domestic hot water connections  mm  15  15  15  15  15 
Condensate drain connection  mm  21.50 21.50 21.50  21.50  21.50 
Safety discharge connection mm 15 15     15  15  15 
Safety discharge pressure  bar 3 3
Temporary filling loop included Yes Yes Yes  Yes  Yes 


Maximum domestic hot water flow rate
(raised 35°C) 
I/min  10.2 12.2 15.0  10.2  12.2 
Domestic hot water operating flow rate (min)  I/min  2.00* 2.00* 2.00*  2.00*  2.00* 
Domestic hot water operating pressure (min)  bar  0.5 0.5 0.5  0.5  0.5 
Domestic hot water system pressure (max)  bar 
CH safety discharge pressure  bar 
Integral automatic bypass    Yes   Yes   Yes  Yes  Yes 
Integral expansion vessel capacity  litres  7 7
Max capacity of central heating system  litres  100 100 100  100  100 
Compartment ventilation requirement    No  No  No  No  No 
CH system inhibitor required    Yes   Yes   Yes  Yes  Yes 
24 hour pump exercise   Yes   Yes   Yes  Yes  Yes 
Pump overrun    Yes   Yes   Yes  Yes  Yes 

Concentric flue systems 

Concentric flue diameters mm 60/100 and 80/125
Standard horizontal flue kit length (60/100mm)  mm  685 685 685  685  685 
Standard horizontal telescope flue length (60/100mm)  mm  315-500 315-500 315-500  315-500  315-500 
Max equiv length horizontal/vertical (60/100mm)  10 10 10  10  10 
Max equiv length horizontal/vertical (80/125mm)  20 20 20  20  20 
Equivalent length per 135° bend  0.50 0.50 0.50  0.50  0.50 
Equivalent length per 93° bend  1.00 1.00 1.00  1.00  1.00 


Max installation lift weight  kg  29.2 29.2 30.5  29.2  29.2 
Gross packaged boiler weight  kg  32.2 32.2 33.5  32.2  32.2 

*Where low flow taps or fittings are intended to be used in the DHW system connected it is strongly recommended that the DHW flow rate DOES NOT fall below 2.5 l/min. This will ensure reliable operation of DHW function

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Download the full specification for the Potterton Assure Combi

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

  • Baxi Single Channel Wired Programmer
  • Baxi uSense Wired
  • Baxi IFOS In Flue Outdoor Sensor
  • Baxi Wired Room Thermostat
  • Baxi Wall Mounted 24hr Mechanical Timer
  • Baxi Single Channel Wired Programmable Room Stat
  • Multifit On Wall Outdoor Sensor Kit - Combi
  • Multifit External Boiler Discharge Pump (PRV and condensate)
  • Multifit 1m condensate drain pipe trace heating element 
  • Multifit 2m condensate drain pipe trace heating element 
  • Multifit 3m condensate drain pipe trace heating element 
  • Multifit 5m condensate drain pipe trace heating element 
  • Multifit remote secondary PRV kit
  • Multifit Rear Pipework Kit
  • Pre-plumb Jig

Interested in this product for your premises? Complete the form below and someone from the team will contact you shortly.

Alternatively, speak to your Business Development Manager about this or any of our products.


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