© EUROHEAT DISTRIBUTORS (H.B.S) LTD. June 2008
E & OE Instructions Part number IN1115 Edition G3
5
Model
Flue Size
Air Requirement
Equivalent Area
as Approved
Document J
UK Smoke
Control
Exemption
Burning Wood
Efficiency
Net %
Rear flue
Efficiency
Net %
Top flue
Efficiency
Gross %
Rear flue
Efficiency
Gross %
Top flue
Harmony 13
5” (125mm)
Nil*
Approved
See intermittent or continuous operation
Harmony 23
6” (153mm)
1100mm2
Approved
73**
65.7**
Harmony 33
6” (153mm)
2750mm2
Approved
77.6
Harmony 43
7” (180mm)
4125mm2
80**
72.8**
Stanford 13
5” (125mm)
Nil*
Approved
See intermittent or continuous operation
Stanford 23
6” (153mm)
1100mm2
Approved
73**
65.7**
Stanford SP23 HP
6” (153mm)
1100mm2
Approved
73**
65.7**
Stanford 33
6” (153mm)
2750mm2
Approved
77.6
Stanford SP33 HP
6” (153mm)
2750mm2
Approved
77.6
Stanford 43
7” (180mm)
4125mm2
80**
72.8**
Stanford SP43 HP
7” (180mm)
4125mm2
80**
72.8**
Nestor Martin R23
6” (153mm)
1100mm2
Approved
73**
65.7**
Nestor Martin R33
6” (153mm)
2750mm2
Approved
77.6
Nestor Martin RH33 7” (178mm)
2750mm2
77.6**
69.7**
Nestor Martin FH33
7” (178mm)
2750mm2
77.6**
69.7**
Exempted
Smoke
Control
Model Name
Model
Number
Heat Output
Nominal
Wood
Heat Output
Nominal
Coal*
Weight
KG
Flue
Draught
Nominal
Flue Gas
Mass
Flow g/s
Flue Gas
Temperature
Down Stream
of Flue Spigot
deg C
Efficiency
with
Top Flue
Connection
Harmony 13 Wood*
H13
5.4kW
96
12pa
4.9
293
83.4% Net
75.9% Gross
Harmony 13 Coal*
H13
3.5kW
96
12pa
3.8
210
78.3% Net
71.2% Gross
Stanford 13 Wood*
S13
5.4kW
96
12pa
4.9
293
83.4% Net
75.9% Gross
Stanford 13 Coal*
S13
3.5kW
96
12pa
3.8
210
78.3% Net
71.2% Gross
* HETAS Approved
Technical Details Continuous Operation
Continuous operation is when the appliance is used for long firing periods for example several hours and
for overnight operation. This is a common operation in cold weather as experienced in deep winter. The
information provided below is from the current CE standards EN 13240:2001 and EN 13240 A2:2004. The test
fuel for wood burning, Beech, for Coal burning Anthracite.
Smoke Control Exempted
Models listed as smoke control exempted have passed the very strict U.K. requirements and can operate in
smoke control zones burning dry seasoned wood.
* Air requirement equivalent area. Building regulations Document J, advises that an air supply should be
installed for appliances with a heating output over 5kW. Document J indicates that there should be sufficient
advantageous air for heating outputs below this amount. With modern properties this may not always be the
case and/or more free air may be required. Continuous or intermittent operation will result in different heating
outputs due to the nature of the fuel and the appliance. If in doubt increase the suggested area listed or contact
your HETAS approved engineer for assistance.
