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Baxi Duo-tec Combi

Reliable and easy to install, you can be assured of the Baxi Duo-tec’s energy efficiency.

  • Features
  • Dimensions
Baxi Duo Tec Combi

Features

*Terms & conditions apply

Baxi

Dimensions

  • 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

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Baxi Duo Tec Combi user guide

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Installer Information

  • Technical Features
  • Technical Data Table
  • Technical Literature
  • Product Training
  • Easy to install
  • 24, 28, 33, 40 kW
  • Dedicated 28kW LPG model
  • Easy to install and service
  • Flow rate up to 16.4 l/min
  • Full wall mounting jig
  • Choice of flue lengths

Baxi Duo-tec Combi 24 Combi 33 Combi 40 Combi 28 Combi LPG
Sales code 7219413 7219415 7219416 7219417
Controls
Concealed user controls Yes Yes Yes Yes
On/off switch with reset Yes Yes Yes Yes
User adjustable DHW temperature Yes Yes Yes Yes
User adjustable CH temperature Yes Yes Yes Yes
LED temp / status / fault diagnosis display Yes Yes Yes Yes
Gas
Gas supply connection mm 22 22 22 22
Natural gas Yes Yes Yes N/A
LPG (propane) N/A N/A N/A 3
Nominal inlet supply pressure NG mbar 20 20 20 N/A
Nominal inlet supply pressure LPG mbar N/A N/A N/A 37
Maximum gas rate m3/hr 2.61 3.6 4.36 2.25 Kg per hr
Heat input central heating kW max gross (QnHs) 22.7 32.1 36.4 27.4
kW min gross (QnHs) 7.8 10.8 11.0 10
Heat output CH non condensing kW max (Pn) 20 28 32 24
kW min (Pn) 6.8 9.4 9.6 8.7
Heat out CH condensing kW max (Pnc) 21.0 30.3 34.4 25.9
kW min (Pnc) 7.4 10.2 12.1 9.5
Heat input domestic hot water (DHW) kW max gross (QnwHs) 27.4 37.7 45.7 32.1
Heat output domestic hot water kW max (Pn) 24 33 40 28
Maximum domestic hot water flow rate l/min @ 35oc 9.8 13.5 16.4 11.5
SAP 2009 annual efficiency (PCDB/SEDBUK) % 89.0 88.9 88.9 90.6
Nox Class 5 5 5 5
ErP Product information
NOx mg/kWh 20 20 23 23
Sound power level, indoors Lwa dB 50 52 50 53
Space heating efficiency class A A A A
Water heat declared load profile XL XL XL XL
Water heating efficiency class A A A A
Electrical
Electrical supply Volts/Hz 230V/50Hz 230V/50Hz 230V/50Hz 230V/50Hz
Permanent live required Yes Yes Yes Yes
Fitted electrical cable

1m x 3 core x 075mm2 on all models

Power consumption Watts 85 125 125 120
External fuse rating Amps 3 3 3 3
Internal fuse rating Amps F2L F2L F2L F2L
Ingress protection rating (without electro-mechanical timer fitted) IPX 5D IPX 5D IPX 5D IPX 5D
24 hour pump exercise Yes Yes Yes Yes
Pump overrun Yes Yes Yes Yes
Integral 'boiler only' frost thermostat Yes Yes Yes Yes
Mechanical and hydraulic
Compartment ventilation requirement None None None None
Pre-plumbing / wall mounting jig Yes Yes Yes Yes
Flow and return pipe size mm 22 22 22 22
Condensate discharge pipe size mm 21.5 21.5 21.5 21.5
Integral automatic bypass Yes Yes Yes Yes
Min domestic hot water flow rate l/min 2 2 2 2
Min domestic hot water operating pressure bar 0.15 0.15 0.15 0.15
Maximum DHW system pressure bar 8 8 8 8
Safety discharge pressure bar 3 3 3 3
Integral expansion vessel capacity litres 8 10 10 8
Max capacity of central heating system litres 125 155 155 125
Filling loop included Yes Yes Yes Yes
CH system inhibitor required Yes Yes Yes Yes
Concentric Flue System
Standard horizontal flue kit length mm 685 685 685 685
Max equiv length horizontal / vertical (60/100mm) m 10 10 10 10
Max equiv length horizontal / vertical (80/125mm) m 20 20 20 20
Equivalent length per 135o bend m 0.5 0.5 0.5 0.5
Equivalent length per 93o bend m 1 1 1 1
Twin pipe flue system
Diameters mm 80/80 80/80 80/80 80/80
Max equiv length horizontal / vertical (parallel pipes) m 15/15 15/15 15/15 15/15
Equivalent length per 135o bend m 0.25 0.25 0.25 0.25
Equivalent length per 91.5o bend m 0.5 0.5 0.5 0.5
Weights
Max installation lift weight kg 40.2 41.7 42.2 40.2
Gross packaged boiler weight kg 46 47.5 48 48

 

 

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