Potterton Assure Combi

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

Contact your BDM
Suitable for

Social Housing

Single boiler output
25kW and 30kW

Lightweight and compact
29kg installer lift weight, making it easy to install

Front access to all components
For easier servicing

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 and 30kW, the Potterton Assure Combi is easy to install and can be fitted in most social housing properties.

Designed for social housing, 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

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  • Outputs: 25kW and 30kW to suit most property sizes
  • Compact cupboard fit means it can be installed discreetly
  • Lightweight 29kg lift weight
  • 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
  • Central flue for ease of siting
  • Flueing options of up to 20m allows for greater flexibility of siting
  • Optional outdoor weather sensor enhances system control and customer comfort
  • No special tools or replacement seals required for standard service
  • Pipes behind facility within boiler casing to save time, space and money by piping behind within the footprint of the appliance
  • Boiler casing hides system connections for a clean aesthetic finish
  • Built in drip tray provides protection against water ingress in extreme weather conditions
  • Optional Safety Assist available gives the ability to protect vulnerable residents by locking controls
  • Vertical packaging allows for ease of access to all installation accessories from top of the packaging

View product specification

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

Potterton Assure Combi 


Units  25  30 
Sales code 7658129 7658130


Concealed user controls    No No  
Reset switch   Yes   Yes  
User adjustable DHW temperature    Yes   Yes  
User adjustable CH temperature    Yes   Yes  
LED temp/status/fault diagnosis display    Yes   Yes  
Integral 24hr electro-mechanical timer    No No


Natural gas Yes Yes
Nominal inlet supply pressure mbar 20  20 
Maximum gas rate  m3/hr  2.71 3.26 
Heat input central heating (CH)  kW Max Gross (QnHs)  22.86 28.58
kW Min Gross (QnHs)  6.87  6.87 
Heat output CH non-condensing  kW Max (Pn)  20.00 25.00 
kW min (Pn)  6.20 6.20 
Heat output CH condensing  kW max (Pnc)  21.16 26.33
kW min (Pnc)  6.70 6.70
Heat input domestic hot water  kW Max Gross (QnwHs)  25.00 30.00
Heat output domestic hot water  kW Max (Pn)  25.77 30.93
Maximum domestic hot water flow rate  l/min @ 30°C rise  12 14.3 

ErP product information 

NOx  mg/kWh  29.7 28.3
Space heating efficiency class   
Water heating declared load profile    XL  XL 
Water heating efficiency class   


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


Pre-plumbing/wall mounting jig (optional accessory)   Yes   Yes  
Isolating valves    Yes   Yes  
Gas supply connection  mm  22  22 
Central heating connections  mm  22  22 
Domestic hot water connections  mm  15  15 
Condensate drain connection  mm  21.50 21.50
Safety discharge connection mm 15 15    
Safety discharge pressure  bar 3 3
Temporary filling loop included No No


Domestic hot water output (raised 35°C) (max)  I/min  10.2 12.2
Domestic hot water operating flow rate (min)  I/min  2.00* 2.00*
Domestic hot water operating pressure (min)  bar  0.5 0.5
Domestic hot water system pressure (max)  bar 
CH safety discharge pressure  bar 
Integral automatic bypass    Yes   Yes  
Integral expansion vessel capacity  litres  7 7
Max capacity of central heating system  litres  120 120
Compartment ventilation requirement    No  No 
CH system inhibitor required    Yes   Yes  
24 hour pump exercise   Yes   Yes  
Pump overrun    Yes   Yes  

Concentric flue systems 

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


Max installation lift weight  kg  29 29
Gross packaged boiler weight  kg  32 32
Boiler dimensions (WxHxD)   390mm x 700mm x 285mm 

*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

Potterton Assure Combi literature

Potterton Assure Range Guide updated 31/08/2017 (47.18MB) Potterton Assure Combi installation and service manual updated 31/08/2017 (5.00MB) Potterton Assure Combi User Guide updated 31/08/2017 (1.08MB)

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

  • Potterton EP Series 1
  • Baxi single channel wired programmable room thermostat
  • Baxi Room thermostat
  • Multifit wired outdoor sensor-combi
  • Multifit pre-plumb jig
  • Multifit rear pipework kit
  • Remote Secondary Prv Kit
  • Filling Loop Kit
  • Multifit Safety Assist
  • Multifit-Condensate Antifreezing Kit-1m
  • Multifit-Condensate Antifreezing Kit-2m
  • Multifit-Condensate Antifreezing Kit-3m
  • Multifit-Condensate Antifreezing Kit-5m
  • Multifit External Condensate/Prv Pump

Potterton Assure Combi ErP labels

Potterton Assure Combi ErP Product Label updated 31/08/2017 (0.22MB) Potterton Assure Combi ErP Package Label updated 31/08/2017 (0.80MB)

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