Baxi Platinum+ 40kW Combi

British built with tough brass hydraulics and has OpenTherm interface so it can be operated using a smart phone or tablet.

  • Features
  • Dimensions
  • Comes with a 10 year warranty
  • Easy to install and maintain, saving time and money
  • Includes Adey Micro2 Magnetic System filter, providing industry leading system protection
  • Optional built-in mechanical 24 hour timer
  • Front access to all components so easy to maintain and service


  • Boiler width = 450mm

  • Boiler height = 780mm

  • Boiler depth = 345mm

  • Side clearance = 5mm

  • Upper clearance = 200mm

  • Lower clearance = 150mm

  • Front clearance = 5mm in operation, 450mm for servicing


Installer Information

Technical Features

  • Output 40kW
  • OpenTherm interface
  • Optional built-in mechanical 24 hour timer
  • Exceptional flow rate (up to 16.4 litres per minute) at a rise of 35ºC, perfect for homes with more than one bathroom
  • Compatible with Multifit flue kits
  • Compatible with IFOS and OWOS weather sensors
  • Front access to all components
  • Pre-plumbing jig, with permanent easy filling link and performed copper tails
  • Built-in frost thermostat



  • Boiler width = 450mm
  • Boiler height = 780mm
  • Boiler depth = 345mm
  • Side clearance = 5mm
  • Upper clearance = 200mm
  • Lower clearance = 150mm
  • Front clearance = 5mm in operation, 450mm for servicing

Technical Data Table

Baxi Platinum+ 40 Combi
Sales Code Boiler Only 7731616
Controls and accessories
User adjustable DHW temperature Range - 30'C to 60'C Yes
User adjustable CH temperature Range - 25'C to 80'C Yes
Temp/status/fault diagnosis display LCD Display
uSense Wired (optional accessory) 7649277 Optional
Integral 24 hr Electro-mechanical timer (optional accessory) Optional
Wired 24 hr Electro-mechanical timer (optional accessory) 720971401 Optional
7 day RF Digital Programmable Room Thermostat (optional accessory) 720030501 Optional
Single Channel WiredProgrammable room Thermostat (optional accessory) 7212438 Optional
Single Channel Wired Timer (optional accessory) 7212444 Optional
Wired Room Thermostat (optional accessory) 720971601 Optional
Multifit Twin Channel Wired Programmer (optional accessory) 7212443 N/A
Multifit IFOS weather compensation (optional accessory) 7724181 Optional
Multifit IFOS Extension (optional accessory) 7724260 Optional
Multifit IFOS System (optional accessory) 7729979 N/A
Ridge Tile IFOS (optional accessory) 7729943 Optional
Baxi Easy-fill Permenant Filling Link 7665482 Yes
Natural gas Yes
Propane LPG N/A
Inlet supply pressure (natural gas) mbar (nominal) 20
Maximum Gas Rate (G20) Qmax m3/hr 4.36
N0x mg/kWh 23
N0x Class 6
Heat input CH kW (max) Gross (QnHs) 36.4
kW (min) Gross (QnHs) 11
Heat Output CH (non-condensing) kW (Max) (Pn) 32
kW (Min) (Pn) 9.6
Heat Output CH (condensing) kW (Max) (Pnc) 34.4
kW (Min) (Pnc) 12.1
Heat Input Domestic Hot Water (DHW) kW max gross (QnwHs) 45.7
Heat Output Domestic Hot Water (DHW) kW max 40
ErP Product Information
Seasonal Space Heating Energy Efficiency 93%
Sound Power Levels, indoors lWA dB 50
Space Heating Efficiency Class A
Water Heating Declared Load Profile XL
Water Heating Efficiency class A
Electrical Supply Volts / Hz 230 / 50
Permanent Live Required Yes
Electrical Cable Supplied (0.75mm heat resistant flex) Yes
Power consumption when firing Watts 125
External fuse rating Amps 3
Internal fuse rating Amps F2L
Boiler IP rating (electrical protection) without integral timer fixed Approval category IPX5D
Circulating pump exercise feature Yes
Pump Overun Yes
Integral 'boiler only' Frost Thermostat Yes
Hanging Bracket Jig
Isolating valves with pre-formed copper tails Yes
Gas supply Connection (mm) 22
Central Heating Connections (mm) 22
Domestic Hot Water Connections (mm) 15
Condense Discharge Pipe Connections (mm) 21.5
Safety DischargePipe Connections (mm) 15
Pre-Plumb Jig (optional accessory) 7682545 Yes
Rear Pipework Kit (optional accessory) 7682790 Optional
Remote Secondary PRV kit (optional accessory) 5121379 Optional
Maximum DHW flow rate (Delta T @ 35'C rise) l/min 16.4
Minimum DHW flow rate required l/min 2
Minimum Operating DHW pressure required bar 0.5
Maximum DHW System Pressure bar 8
Safety Discharge Pressure bar 3
Compartment Ventilation Required No
Integral Expansion Vessel Size (litres) 10
Maximum Capacity of CH System Litres 125
Integral Automatic Bypass Yes
CH System Inhibitor Required Yes
Concentric flue systems
Concentric Flue Diameters (mm) 60/100 and

Standard telescopic horizontal flue (60/100) (mm) 315 - 500
Standard horizontal flue kit (60/100) (mm) 685
Max equiv length horizontal / vertical (60/100) m 10
Max equiv length horizontal / vertical (80/125) m 20
Equivalent length per 135' bend m 0.5
Equivalent length per 93' bend m 1
Installer Lift Weight (boiler) (kg) 42.2
Gross packaged boiler weight (kg) 50

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