Baxi 636 Combi LPG

Our Baxi Combi 636 LPG is lightweight and compact cupboard fit.

  • Features
  • Dimensions
  • 7 year parts and labour warranty*
  • Built in the UK using top quality brass components
  • Fits inside a standard kitchen cupboard
  • EasyFill makes it easy to top up the central heating system pressure without the need to call an engineer
  • For homes off the mains gas network - could save money on fuel bills

*Terms and Conditions apply.


  • Boiler width = 390mm
  • Boiler height = 700mm
  • Boiler depth = 285mm
  • Side clearance = 5mm
  • Upper clearance = 178mm
  • Lower clearance = 200mm
  • Front clearance = 5mm in operation, 450mm for servicing

Installer Information

Technical Features

  • 7 year parts and labour warranty
  • Dedicated 36kW LPG model
  • Compact cupboard fit
  • Pipes behind facility within boiler casing
  • High flow rate of 15.0 litres per minute
  • Easy fill permanent filling link
  • Fully modulating and highly efficient
  • Ease of service
  • Front access to all components
  • Brass hydraulics block
  • Built in drip tray
  • Lightweight


BAxi 200 Combi
  • Boiler width = 390mm
  • Boiler height = 700mm
  • Boiler depth = 285mm
  • Side clearance = 5mm
  • Upper clearance = 178mm
  • Lower clearance = 200mm
  • Front clearance = 5mm in operation, 450mm for servicing

Technical Data Table

Baxi 636 Combi LPG
Sales Code Boiler Only 7703805
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) N/A
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 No
Propane LPG Yes
Inlet supply pressure (natural gas) mbar (nominal) 37
Maximum Gas Rate (G20) Qmax m3/hr 2.83
Maximum Gas Rate (G31) Qmax kg/h 2.83
N0x mg/kWh 39
N0x Class 6
Heat input CH kW (max) Gross (QnHs) 28.6
kW (min) Gross (QnHs) 7.4
Heat Output CH (non-condensing) kW (Max) (Pn) 25
kW (Min) (Pn) 6.7
Heat Output CH (condensing) kW (Max) (Pnc) 26.4
kW (Min) (Pnc) 6.7
Heat Input Domestic Hot Water (DHW) kW max gross (QnwHs) 40.8
Heat Output Domestic Hot Water (DHW) kW max 36
ErP Product Information
Seasonal Space Heating Energy Efficiency 93%
Sound Power Levels, indoors lWA dB 51
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) No
Power consumption when firing Watts 110
External fuse rating Amps 3
Internal fuse rating Amps F2A H250V
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 Yes
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 Optional
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 15
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) 7
Maximum Capacity of CH System Litres 100
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) 30.2
Gross packaged boiler weight (kg) 33.5

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