| Baxi Duo-tec Combi |
24 Combi |
28 Combi |
33 Combi |
40 Combi |
28 Combi LPG |
| Sales code |
7219413 |
7219414 |
7219415 |
7219416 |
7219417 |
| Controls |
| Concealed user controls |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| On/off switch with reset |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| User adjustable DHW temperature |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| User adjustable CH temperature |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| LED temp / status / fault diagnosis display |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Gas |
| Gas supply connection |
mm |
22 |
22 |
22 |
22 |
22 |
| Natural gas |
|
Yes |
Yes |
Yes |
Yes |
N/A |
| LPG (propane) |
|
N/A |
N/A |
N/A |
N/A |
3 |
| Nominal inlet supply pressure NG |
mbar |
20 |
20 |
20 |
20 |
N/A |
| Nominal inlet supply pressure LPG |
mbar |
N/A |
N/A |
N/A |
N/A |
37 |
| Maximum gas rate |
m3/hr |
2.61 |
3.1 |
3.6 |
4.36 |
2.25 Kg per hr |
| Heat input central heating |
kW max gross (QnHs) |
22.7 |
27.4 |
32.1 |
36.4 |
27.4 |
| kW min gross (QnHs) |
7.8 |
10 |
10.8 |
11.0 |
10 |
| Heat output CH non condensing |
kW max (Pn) |
20 |
24 |
28 |
32 |
24 |
| kW min (Pn) |
6.8 |
8.7 |
9.4 |
9.6 |
8.7 |
| Heat out CH condensing |
kW max (Pnc) |
21.0 |
25.9 |
30.3 |
34.4 |
25.9 |
| kW min (Pnc) |
7.4 |
9.5 |
10.2 |
12.1 |
9.5 |
| Heat input domestic hot water (DHW) |
kW max gross (QnwHs) |
27.4 |
32.1 |
37.7 |
45.7 |
32.1 |
| Heat output domestic hot water |
kW max (Pn) |
24 |
28 |
33 |
40 |
28 |
| Maximum domestic hot water flow rate |
l/min @ 35oc |
9.8 |
11.5 |
13.5 |
16.4 |
11.5 |
| SAP 2009 annual efficiency (PCDB/SEDBUK) |
% |
88.6 |
88.6 |
88.5 |
88.5 |
90.6 |
| Nox Class |
|
5 |
5 |
5 |
5 |
5 |
| ErP Product information |
| NOx |
mg/kWh |
20 |
23 |
20 |
23 |
23 |
| Sound power level, indoors |
Lwa dB |
50 |
53 |
52 |
50 |
53 |
| Space heating efficiency class |
|
A |
A |
A |
A |
A |
| Water heat declared load profile |
|
XL |
XL |
XL |
XL |
XL |
| Water heating efficiency class |
|
A |
A |
A |
A |
A |
| Electrical |
| Electrical supply |
Volts/Hz |
230V/50Hz |
230V/50Hz |
230V/50Hz |
230V/50Hz |
230V/50Hz |
| Permanent live required |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Fitted electrical cable |
|
1m x 3 core x 075mm2 on all models
|
| Power consumption |
Watts |
85 |
120 |
125 |
125 |
120 |
| External fuse rating |
Amps |
3 |
3 |
3 |
3 |
3 |
| Internal fuse rating |
Amps |
F2L |
F2L |
F2L |
F2L |
F2L |
| Ingress protection rating (without electro-mechanical timer fitted) |
IPX 5D |
IPX 5D |
IPX 5D |
IPX 5D |
IPX 5D |
| 24 hour pump exercise |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Pump overrun |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Integral 'boiler only' frost thermostat |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Mechanical and hydraulic |
| Compartment ventilation requirement |
|
None |
None |
None |
None |
None |
| Pre-plumbing / wall mounting jig |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Flow and return pipe size |
mm |
22 |
22 |
22 |
22 |
22 |
| Condensate discharge pipe size |
mm |
21.5 |
21.5 |
21.5 |
21.5 |
21.5 |
| Integral automatic bypass |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Min domestic hot water flow rate |
l/min |
2 |
2 |
2 |
2 |
2 |
| Min domestic hot water operating pressure |
bar |
0.15 |
0.15 |
0.15 |
0.15 |
0.15 |
| Maximum DHW system pressure |
bar |
8 |
8 |
8 |
8 |
8 |
| Safety discharge pressure |
bar |
3 |
3 |
3 |
3 |
3 |
| Integral expansion vessel capacity |
litres |
8 |
8 |
10 |
10 |
8 |
| Max capacity of central heating system |
litres |
125 |
125 |
155 |
155 |
125 |
| Filling loop included |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| CH system inhibitor required |
|
Yes |
Yes |
Yes |
Yes |
Yes |
| Concentric Flue System |
| Standard telescopic horizontal flue kit length |
mm |
315-500 |
315-500 |
315-500 |
315-500 |
315-500 |
| Max equiv length horizontal / vertical (60/100mm) |
m |
10 |
10 |
10 |
10 |
10 |
| Max equiv length horizontal / vertical (80/125mm) |
m |
20 |
20 |
20 |
20 |
20 |
| Equivalent length per 135o bend |
m |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
| Equivalent length per 93o bend |
m |
1 |
1 |
1 |
1 |
1 |
| Twin pipe flue system |
| Diameters |
mm |
80/80 |
80/80 |
80/80 |
80/80 |
80/80 |
| Max equiv length horizontal / vertical (parallel pipes) |
m |
15/15 |
15/15 |
15/15 |
15/15 |
15/15 |
| Equivalent length per 135o bend |
m |
0.25 |
0.25 |
0.25 |
0.25 |
0.25 |
| Equivalent length per 91.5o bend |
m |
0.5 |
0.5 |
0.5 |
0.5 |
0.5 |
| Weights |
| Max installation lift weight |
kg |
40.2 |
40.2 |
41.7 |
42.2 |
40.2 |
| Gross packaged boiler weight |
kg |
46 |
46 |
47.5 |
48 |
48 |
