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450mm
5mm Min
450mm
270mm
180mm
5mm Min
450mm Min
For Servicing
Purposes
345mm
5mm Min
In Operation
* This is the MINIMUM recommended dimension.
Greater clearance will aid installation and maintenance.
Baxi Duo-tec Combi HE
5mm Min
5mm Min
CONTROLS
200mm Min
Concealed User Controls
(300mm Min if
using 80/125mm
On/Off Switch with Reset
flueing system)
User Adjustable DHW Temperature
200mm Min
User Adjustable CH Temperature
LED Temp/Status/Fault Diagnosis Display
GAS
Gas Supply Pipe Size
Natural Gas
LPG (Butane/Propane)
Nominal Inlet Supply Pressure NG/LPG
Maximum Gas Rate NG/LPG
780mm
Heat Input Central Heating
780mm
Heat Output CH Non Condensing
(70° Mean)
Heat Output CH Condensing
(40° Mean)
Heat Input Domestic Hot Water
200mm Min
150mm Min*
Heat Output Domestic Hot Water
Maximum Domestic
Hot Water Flow Rate
Seasonal Efficiency NG/LPG
SEDBUK Rating
At least 1.5°
NO x Class
NO
Levels
x
ELECTRICAL
Electrical Supply
Permanent Live Required
Fitted Electrical Cable
Power Consumption
External Fuse Rating
Internal Fuse Rating
Ingress Protection Rating (without electro-mechanical timer fitted)
24 hour Pump Exercise
Pump Overrun
Integral 'Boiler Only' Frost Thermostat
MECHANICAL & HYDRAULIC
Compartment Ventilation Requirement
Pre-plumbing/Wall Mounting Jig
Flow & Return Pipe Size
Condensate Discharge Pipe Size
Integral Automatic Bypass
Min Domestic Hot Water Flow Rate
Min Domestic Hot Water Operating Pressure
Maximum DHW System Pressure
Safety Discharge Pressure
Integral Expansion Vessel Capacity
Max Capacity of Central Heating System
Filling Loop included
CH System Inhibitor Required
CONCENTRIC FLUE SYSTEM
Standard Telescopic Horizontal Flue Kit Length
Max Equiv Length Horizontal/Vertical (60/100mm)
Max Equiv Length Horizontal/Vertical (80/125mm)
Equivalent Length per 135° Bend
Equivalent Length per 93° Bend
TWIN PIPE FLUE SYSTEM
Diameters
Max Equiv Length Horizontal/Vertical (parallel pipes)
Equivalent Length per 135° Bend
Equivalent Length per 91.5° Bend
WEIGHTS
Max Installation Lift Weight
Gross Packaged Boiler Weight
Duo-tec Combi HE
Series: Wall mounted high efficiency combination boilers
A
24 HE
Yes
Yes
Yes
Yes
2 digits/3 LEDs
mm
22
Yes
Yes
mbar
20 /N/A
m
3
/hr / kg/hr
2.61/1.92
kW Max Gross
22.7
kW Max Net
20.5
kW Min Gross
7.8
kW Min Net
7
kW Max
20
kW Min
6.8
kW Max
21
kW Min
7.4
kW Max Gross
27.4
kW Max Net
24.7
kW Max
24
l/min @ 35°C Rise
9.8
%
91.1/93.2
Band
A
5
mg / kWhr
22.3
Volts / Hz
230V / 50Hz 230V / 50Hz 230V / 50Hz 230V / 50Hz
Yes
Watts
155
Amps
3
Amps
F2L
IPX 5D
Yes
Yes
Yes
None
Yes
mm
22
mm
21.5
Yes
l/min
2
bar
0.15
bar
8
bar
3
litres
8
litres
125
Yes
mm
m
10
m
20
m
0.5
m
1
mm
80 / 80
m
15/15
m
0.25
m
0.5
kg
43.6
kg
48.6
A
28 HE
33 HE
40 HE
A
A
A
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
2 digits/3 LEDs
2 digits/3 LEDs
2 digits/3 LEDs
22
22
22
Yes
Yes
Yes
Yes
Yes
No
20 /37
20 / N/A
20 / N/A
3.10/2.32
3.59/2.64
4.36/N/A
27.4
32.1
36.4
24.7
28.9
32.8
10.0
10.8
11
9
9.7
9.9
24
28
32
8.7
9.4
9.6
25.9
30.3
34.4
9.5
10.2
12.1
32.1
37.7
45.7
28.9
34
41.2
28
33
40
11.5
13.5
16
91.1/93.2
91.1/93.2
91.1/N/A
A
A
A
5
5
5
26.0
21.8
25.2
Yes
Yes
Yes
1m x 3 core x 0.75mm
2
155
160
160
3
3
3
F2L
F2L
F2L
IPX 5D
IPX 5D
IPX 5D
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
None
None
None
Yes
Yes
Yes
22
22
22
21.5
21.5
21.5
Yes
Yes
Yes
2
2
2
0.15
0.15
0.15
8
8
8
3
3
3
8
10
10
125
155
155
Yes
Yes
Yes
Hard Water only
315 - 500
10
10
10
20
20
20
0.5
0.5
0.5
1
1
1
80 / 80
80 / 80
80 / 80
15/15
15/15
15/15
0.25
0.25
0.25
0.5
0.5
0.5
44.2
46
46
49.2
51
51
A
9
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