Baxi Assure 500 Combi 2

The Baxi Assure 500 Combi 2 is a high efficiency boiler that is simple to use and will provide plenty of heating and hot water, whenever you need it.

It is compatible with the Baxi uSense 2 smart control that can be operated using a smart phone or tablet. It also features a heated condensate trap to help avoid frozen condensate pipes in the winter. 

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Features and benefits   |    Dimensions    |    Product literature    |    Technical specifications   |   Related products   |   FAQs

Features and benefits


  • A: Boiler width = 395mm
  • B: Boiler height = 700mm
  • C: Boiler depth = 285mm
  • D: Side clearance = 2.5mm
  • E: Upper clearance = 178mm
  • F: Lower clearance = 150mm
  • G: Front clearance = 5mm in operation (450mm for servicing)
Baxi  500 Combi 2 Line Diagram_ALT

Product literature

Technical specifications

  • 24, 30 and 36kW Combi (Natural Gas or LPG)
  • Lightweight and compact cupboard fit
  • Natural gas to LPG conversions
  • Positive fit PrV connection pipe
  • Combined PrV with separate drain
  • Certified OpenTherm
  • Pre-heated Siphonic Condensate Trap
  • 2 years parts and labour warranties

  • View full technical specifications
Technical Specifications   Baxi 524 Assure Combi Baxi 530 Assure Combi Baxi 536 Assure Combi
Sales Code   7814309 7814310 7814311
Natural gas or LPG   Yes Yes Yes
Inlet supply pressure (natural gas) mbar (nominal) 20 20 20
Maximum Gas Rate (G20) Omax m³ / hr 2.61 3.26 3.9
Heat Input CH kW (max) Gross (OnHs)  20.6 25.7 25.7
  kW (min) Gross (OnHs) 4.9 6.0 7.2
Heat Output CH (non-condensing) kW (Max) (Pn) 20 25 25
  kW (Min) (Pn) 4.8 5.8 7.2
Heat Output CH (condensing) kW (Max) (Pnc) 21.8 27.1 27.1
  kW (Min) (Pnc) 5.2 6.3 7.6
Heat Input domestic hot water (DHW) kW max gross (OnwHs)  27.4 30.9 36.9 
Heat Output domestic hot water (DHW) kW max  24  30  36 
Water heating efficiency class   A A
Permanent live required   Yes  Yes  Yes 
External fuse rating (on connection board) Amps F0.5A L250VP F0.5A L250VP F0.5A L250VP
Pump overrun   Yes Yes Yes
Integral 'boiler only' frost thermostat   Yes Yes Yes
Maximum DHW flow rate (Delta T @35'C rise)  l/min 10.2  12.2  15
Minimum DHW flow rate required   l/min 
Minimum operating DHW pressure required bar 0.5  0.5  0.5 
Integral expansion vessel Size (litres) 
Maximum capacity of the CH system Litres  100  100  100 
Integral automatic bypass   Yes  Yes  Yes 
Installer Lift Weight (kg) 29.5  31.8 32.3 
Height  mm 700 700 700
Width mm 395 395 395
Depth mm 285 285 285
Side (mm) mm 2.5 2.5 2.5
Upper (mm)  mm  178 178 178
Lower (mm)  mm  150 150 150
Front  mm  5 5 5
Front (Service) mm 1000 1000 1000

More information


  • How to turn down the flow temperature of your combi boiler
  • How do I top up the water pressure?
  • How to reset a Baxi boiler
  • How do I bleed a radiator?

Watch our video to learn how to turn down the flow temperature of your boiler and save money on your energy bills.

Read full FAQ

It is quite simple to top up the water pressure in your boiler. You should be able to do it yourself without having to call a heating engineer. Watch our video to find out how.

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Read how to reset your boiler, whether it has a dedicated reset button, an ON/OFF/SELECTOR switch or a thermostat control knob.

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If you have cold spots at the top of your radiators, it means that there is trapped air that needs to be removed so your radiators will heat your room efficiently. Follow our simple steps for bleeding your radiators. 

Read full FAQ