The Baxi Duo-tec Combi GA boiler uses gas adaptive control, which, together with a wide modulation range of 1:7, contributes to smooth operation which delivers more energy efficiency and reliability. It is an Energy Saving Trust endorsed product, so you can be sure it meets the highest standards of energy efficiency.
It is available in outputs of 24kW, 28kW, 33kW and the popular 40kW model, which delivers a higher domestic hot water flow rate for larger properties.
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.
* Subject to registration and an annual service
A: Boiler width = 450mm
B: Boiler height = 763mm
C: Boiler depth = 355mm
D: Side clearance = 5mm
E: Upper clearance = 175mm
F: Lower clearance = 150mm
G: Front clearance = 5mm in operation, 450mm for servicing
|Duo-tec Combi 24||Duo-tec Combi 28||Duo-tec Combi 33||Duo-tec Combi 40|
|Heat Output CH||kW (Max)||20||24||28||33|
|Heat Output DHW||Output - kW (Max)||24||28||33||40|
|Maximum DHW Flow Rate (Delta T @ 35°Max)||l/min||9.8||11.5||13.5||16.4|
|Minimum DHW Flow Rate Required||l/min||2||2||2||2|
|Minimum Operating DHW Pressure Required||bar||0.15||0.15||0.15||0.15|
|SEDBUK 2005 Seasonal Efficiency NG / LPG||%||91.1 / 93.2||91.1 / 93.2||91.1 / 93.2||91.1 / 93.2|
|SEDBUK 2009 Seasonal Efficiency NG / LPG||%||88.9 / 91.0||89.0 / 91.0||89.0 / 90.9||88.9 / 90.9|
|NOx Class (5 being lowest)||1 - 5||5||5||5||5|
|Mechanical & Hydraulic Connections|
|CH Flow / Return Pipe Size||(mm)||22||22||22||22|
|DHW Flow / Inlet / PRV Size||(mm)||15||15||15||15|
|Condensate Discharge Pipe Size||(mm)||21.5||21.5||21.5||21.5|
Additional heating and hot water controls can improve the overall performance of your heating system by as much as 13% (according to ErP Directive drafts), dramatically reducing the amount of fuel you use, and the amount you pay for your energy bill.
For more information please speak to your installer as they will be able to advise you on the controls that are right for you.
*Test conducted by independent scientific test house TNO, based on an average household's consumption of 100 litres of hot water per day
You can find out more about the Baxi Duo-tec Combi GA by reading the associated product literature, whether looking for a guide on how to use your boiler's controls, or instructions on how to install a product component.
We have Gas Safe Registered installers all over the UK who will be able to give you a quote for the installation of your new boiler. To use our handy find an installer tool, simply enter a few details and we'll do all the hard work for you by contacting them on your behalf.
The installer will get in touch to arrange a site survey to give you a competitive, no obligation quote.
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