Potterton Promax Store

With a unique roller system and surprisingly low lift weight, the Potterton Promax Store provides a simple and easy to install heating solution for domestic properties with high hot water demands. 

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Suitable for

Social Housing

New Builds

Easy to move and install
Unique roller system

Compact and light
Can be installed in a standard kitchen cupboard

Inbuilt storage range
90, 115 or 150L stores

The Promax Store provides a reliable and efficient solution for new build and social housing installations that easily fits in a standard airing cupboard and comes in 90, 115 or 150 litre stores.

The Potterton Promax Store is a floor standing integrated hot water storage and central heating boiler. Suitable for fully pumped, sealed systems and with flueing options of up to 20m there is greater siting flexibility.

You can register your Potterton boiler online using Baxi's warranty registration form.

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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  • Unique roller system  - easy to move and install
  • Compact and light -  can be installed in a standard kitchen unit
  • Simple mounting plate - making for a quick and easy installation 
  •  No pump overrun - shortening installation time further
  •  Pre-plumbing jig -  saving time on installation
  • Compatible with Megaflo Eco Solar Cylinder and Santon Premier Plus Solar cylinder

Potterton Promax Store

Units  90L 115L  150L 
Sales code 7219463 7219465 7219466


Operating mode selector switch with reset   Yes  Yes   Yes  
User adjustable DHW temperature    Yes   Yes   Yes  
User adjustable CH temperature    Yes   Yes   Yes  
LED operating status display    Yes   Yes   Yes  
Integral 7 day twin channel timer   Yes Yes  Yes 


Gas (natural gas/LPG)  NG NG NG
Inlet supply pressure mbar  20  20  20 
Maximum gas rate   m3/h  2.6  2.6 2.6 
Heat input central heating (CH)  kW Max Gross (QnHs)  27.4 27.4 27.4
kW Min Gross (QnHs)  7.8 7.8 7.8
Heat output CH non-condensing  kW Max (Pn)  24 24 24
kW min (Pn)  6.8 6.8 6.8
Heat output CH condensing  kW max (Pnc)  25.9 25.9 25.9
kW min (Pnc)  7.6 7.6 7.6
SAP 2009/2012 annual efficiency (PCDB/SEDBUK)  89.0 89.0  89.0 
NOx class   

ErP product information 

NOx  mg/kWh  15 17  15 
Space level heating, indoors  LwaDB  57  57  57 
Space heating efficiency class   
Water heating declared load profile    XL  XL  XL 
Water heating efficiency class   
EcoHomes  Credits 3


Electrical supply  Volts/Hz  230/50  230/50  230/50 
Permanent live required  Yes  Yes  Yes 
Power consumption  Watts  126  126 126
External fuse rating  Amps 
Boiler IPX rating (electrical protection)   
Integral 'boiler only' frost thermostat    Yes  Yes  Yes 
Back up immersion heater (optional)    Yes   Yes   Yes  


Gas supply connection  mm  22  22  22 
Central heating connections  mm  22  22  22 
Condensate drain connection  mm  21.5 21.5 21.5


Domestic hot water flow rate (max) I/min  25 25 25
Safety discharge pressure  bar 
Integral automatic bypass    Yes   Yes   Yes  
Integral expansion vessel capacity  litres  12 12  12 
Compartment ventilation requirement    No  No  No 
24 hour pump exercise   Yes   Yes   Yes  
Pump overrun    Yes   Yes   Yes  

Concentric flue systems 

Concentric flue diameters mm  60/100 and 80/125  
Standard horizontal flue kit length mm  685 685 685
Max equiv vertical length (ø60/100) 10 10 10 
Max equiv vertical length (ø80/125)  20 20 20
Max equiv horizontal length (ø60/100)  10 10 10
Max equiv horizontal length (ø80/125)  20  20  20 

Twin flue system 

Twin pipe flue diameter mm  80/80 80/80 80/80
Max equivalent vertical length 15 15 15
Max equivalent horizontal length 15 15 15
Packaged boiler dimensions (WxHxDxSCxUCxFC)   550mm x 1264mm-1544mm (dependant on appliance cylinder size) x 600mm x 25mm x 250mm x 5mm (500mm for servicing) 



Promax Store literature

Potterton Promax Range Guide updated 17/05/2017 (15.43MB) Tenants leaflet example updated 30/06/2017 (3.90MB) Promax store user guide updated 20/07/2015 (1.87MB) Promax store installation and servicing manual updated 20/07/2015 (5.07MB) Promax multifit flue guide updated 13/09/2016 (2.88MB)

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

  • Multifit condensate trace heating kit 1m
  • Multifit condensate trace heating kit 2m
  • Multifit condensate trace heating kit 3m 
  • Multifit condensate trace heating kit 5m 
  • Multifit external boiler discharge pump (prv and condensate)
  • Terminal guard ∅ 60/100
  • Stainless steel PDK guard ∅ 60/100 - air intake S/S


Promax Store ErP labels

Promax store ErP label updated 08/04/2016 (0.13MB) Product fiche Potterton Promax Store updated 09/09/2015 (0.10MB)

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