Euroheat Harmony 15 Quick start guide

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
1
Balanced Flue Stove
Technical Guide
Document No: IN1105

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
2
Hearth and Fireplace Requirements
Do not be tempted to fit the stove into an unsuitable fireplace. Beyond the requirements
of the building regulations and access to facilitate servicing the stove, providing a
setting which will complement the stove is not a luxury, it is the practicality of making
the most of an investment. A good builder will be able to transform even the most
utilitarian of fireplaces, whether altering its proportions to those of the “Golden Mean”
ideal, exposing a wooden lintel, stone or simply removing superfluous detailing for
comparatively small costs, and the result will be a pleasure for many years.
Minimum clearance
from combustible
materials
Minimum clearance
from non
combustible
materials
A 12" 300mm** 9" 230mm
B 6" 150mm** 4" 100mm
C 1" 25mm** N/A
D 2" 50mm** 2" 50mm
E 6" 150mm** 4" 100mm
F12mm of non
combustable material.
12mm of non
combustable material.
Curtains and furnishings should be a minimum of
1m from the stove.
The stove can be placed on a combustible
floor providing it can support the weight,
and providing a non combustible hearth
plinth with a minimum thickness of
12mm is utilized.
** The measurements provided are
for guidance only.
In all installations any surrounding
flammablematerialsmustnot be allowed
to exceed 80°C or a non combustible
shield provided in accordance with
current regulations. The stove must
always stand perfectly level and have
sufficient space allowing for service
work.
A
B
D
C
E
F
1/3 2/3
“Golden Mean”
Side Prole
1
2/3 2/3
“Golden Mean”
Front View

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
3
Balanced Flue Systems
A balanced flue system utilizes a double concentric pipe, the inner one taking away the products of combustion
and the outer one bringing the air supply to the stove. This system allows a gas stove to be installed where no
flue exists, and because the flue needs very little vertical height to operate, it is often possible to route the flue
through the room wall to the outside.
With all the air necessary for combustion being supplied through the outer pipe directly from the outside, the
room in which the stove is installed needs no ventilation specifically for the stove.
The balanced flue system has been designed to give a huge range of installation options, terminating either
horizontally or vertically, as illustrated in the diagram below.
Deciding on which form the balanced flue should take will very much be constrained by the termination of the
flue. Building Regulations lay out definitive guide lines for where a flue can terminate, see the diagram later in
this document, and if the building is listed there may be constraints on the position of any terminal and advice
should be sort from the appropriate regulatory authority.

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
4
No Chimney ----- No Problem
This document will help you design and your qualified engineer install a suitable balanced flue system for your
stove. Following the simple guide lines will allow a balanced flued stove to be fitted in most situations where
a conventionally flued stove could not be fitted.
Top to Vertical High Level Flue Kit
The vertical balanced flue system is ideal in situations such as in a newly constructed
conservatory where there are no walls through which to pass a horizontal flue. The flue will
rise from the stove vertically passing through the roof where it will then terminate with a
vertical terminal.
Minimum height 2m maximum 30m.
Top to Horizontal High Level Flue Kit
It is not necessary for the stove to be situated against the outside wall through which the
flue will pass, as the versatility of the balanced flue system can allow for considerable
lengths of horizontal run of the flue.
Rear to Horizontal Low Level
The low level horizontal kit is probably the simplest method of installation and allows
you to fit the stove against any suitable outside wall in any room in your property.
Maximum horizontal length 440mm, minimum length 310mm.
Existing Chimney Adapter Kit
The flue kits are also designed to be able to utilize an existing chimney. Properties
which are designed with a high thermal efficiency may not allow an air brick
to be fitted to supply air to a stove over 7kW input, the balanced flue stove
overcomes this requirement as it is a sealed appliance.
In some cases the top section of a chimney may have been removed and the
versatility of the balanced flue system allows you to use what remains of the
chimney using the chimney adapter kit.

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
5
Location of Outlets from Flues Serving Gas Balanced Flue Stoves.
)
Minimum Separation Distances for Terminals in mm
Location Balanced Flue
A Below an opening Appliance
rated heat
input
0-7kw
>7-14kw
> 14-32kw
>32
300
600
1500
2000
B Above an opening (1) 0-32kw
>32kw
300
600
C Horizontally to an opening (1) 0-7kw
>7-14kw
>14kw
300
400
600
D Below gutters, soil pipes or drain
pipes 300
E Below eaves 300
F Below balcony or car port roof 600
G From a vertical drain pipe or soil
pipe 300
Minimum Separation Distances for Terminals in mm
Location Balanced Flue
H From an internal or external corner
or to a boundry alongside the
terminal
600
I Above ground,roof or balcony level 300
J From a surface or a boundary facing the
terminal 600
K From a terminal facing the terminal 600
L From an opening in the car port into the
building 1200
M Vertically from a terminal on the same
wall 1200
N Horizontally from a terminal on the
same wall 300
P From a structure on the roof 1500
Q Above the highest point of
intersection with the roof 600
R Flue should not penetrate shaded area 600
S Flue should not penetrate shaded area 200
Note (1)
An opening means an openable element, such as an openable window, or a fixed opening such as an air
vent. However, in addition, the outlet should not be nearer than 300mm to an opening into the building fabric
formed for the purpose of accommodating a built in element, such as a window frame.

Calculating Flue Aspect Ratios
The stove operates correctly only with air flow induced by the flue system being within the defined parameters.
To achieve these, the vertical elements of the flue, which induce flue draught and increase the air supply to the
stove, must be balanced against the horizontal elements of the flue, which offer resistance to flue draught and
reduce the air supply to the stove.
The ratio of vertical to horizontal lengths must be calculated to ensure the correct flue draught will be induced
by the proposed flue.
The difference in height between the top of the stove and the bottom of the terminal determines the vertical
height to be used in the calculation. The flue run may necessitate the vertical elements to be separated by
several horizontal runs, this is not important, only the total height gain is needed.
The horizontal length is often more tedious to determine, but again, it is the total length which needs to be
determined, regardless of their being continuous or in stages. Any 90 degree change of direction within the
flue will offer resistance to flue draught and each change of direction will offer the same resistance to the flue
draught as a horizontal run of 1000mm. For every 45 degree change in direction the resistance is that of a
horizontal run of 500mm.
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
0.5
1.0
1.5
2.0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
BALANCED FLUE ASPECT RATIO DYNAMICS ILLUSTRATED
For 1m vertical rise a flue may have a maximum horizontal run of 7m.
For each 90 degree bend introduced the horizontal run must be reduced by 1m.
For each 45 degree bend introduced the horizontal run must be reduced by 500mm.
.5m vertical = 3.5m horizontal max.
1m vertical = 7m horizontal max.
Depending on
which direction your
flue configuration
will take and the
model of the stove,
a flue reduction
plate (FRP) may
or may not be
required.
See pages 24 & 25
for details.
© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
6

0
0.5
1.0
0
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0
0.5
1.0
1.5
1.5
For a 1m vertical rise a flue can have a maximum of 7m horizontal length.
Each additional 90 degree bend creates a draught resistance equal to 1m
of horizontal length.
Therefore in example 'B' the introduction of 2 x 90 degree bends,
in a horizontal plain, reduces the maximum horizontal length by 2m.
Example 'A'
Example 'B'
Example 'C'
0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 5.5 6.0 6.5 7.0
0Min 310mm/ Max 440mm
The rear exit flue may have a maximum horizontal run of 440mm
from the flue spigot, the minimum length 310mm.
Flue spigot
Basic Principle of Balanced Flue Ratios Illustrated
© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
7
Top to Horizontal High Level
Rear to Horizontal Low Level

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
8
Example 1: Top to Horizontal High Level Kit
Using the standard top to horizontal high level flue kit only.
Standard kit starter
length T1
Standard kit
terminal length T2
Sleeve kit
(accessory)
Ceramic rope or
Fraxll sealant to
prevent draughts
Standard kit 90
degree long bend
Minimum
50mm
Cavity wall
12mm
Solid wall
MM
Description Part No.
Top to
HorizontalHigh
Level Kit
150mm 180mm
MS91102 MS91103
Sleeve liner MS91065 MS91066
Terminal
guard FP767 FP767
Closure bezel MS91033 MS91040
Components used Closure
bezel
Terminal guard
(accessory)
The closure
bezel fits around
the flue pipe
covering the
hole through
a solid wall
giving the
installation
a clean finish
both inside and
outside.

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
9
Example 2: Top to Horizontal High Level Kit
Taking the attached diagram as an example we can calculate the flue parameters for a top to horizontal flue
system. Total Height = A
Total Horizontal = B
In this example
A = 2.8 Metres B = 1.75 Metres
Three x 90 degree bends have been used one of which (C) is the standard supply kit bend. This bend is ignored
from the calculation as it is presumed it will always be used. The two remaining 90 degree bends increase the
horizontal length by two metres.
(one metre extra horizontal length per additional 90 degree bend).
Total Height A = 2.8 Metres
Total Horizontal B = 1.0 Metres
In this example there is sufficient vertical rise for the horizontal run, as shown in the graph on page 6.
Standard kit
terminal length
T2
Standard kit
long 90Obend
Accessory 250mm
length within wall
Accessory short
90Obend
Accessory short
90Obend
Accessory
500mm length
Standard kit
starter length
T1
Accessory 1metre length
Wall band
B
B
B+B= Total Horizontal
AA Total height
Description Part No. Quantity
Top to
HorizontalHigh
Level Kit
150mm 180mm
1
MS91102 MS91103
1 metre length MS91028 MS91034 1
500mm length MS91029 MS91035 2
250mm length MS91030 MS91036 1
90° short bend MS91031 MS91037 2
Wall band MS91052 MS91053 1
Components used

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
10
Example 3: Top to Vertical High Level Kit
The ratio of vertical to horizontal lengths must be calculated to ensure the correct flue draught will be induced
by the proposed flue. Taking the ratio diagram as an example we can calculate the flue parameters for a top
to vertical flue system. Total Height = A
Total Horizontal = B
In this example
A = 3.5 Metres B = 1.5 Metres
Two x 90deg bends have been used. The two 90 degree bends increase the horizontal length by two metres.
(One metre extra horizontal length per additional 90 degree bend).
Total height A = 3.5 Metres
Total Horizontal B =0.9 Metres
In this example there is sufficient vertical rise for the horizontal run, as shown in the illustration on page 6.
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Description Part No. Quantity
Top to Vertical
High Level Kit
150mm 180mm 1
MS91100 MS91101
1 metre length MS91028 MS91034 1
500mm length MS91029 MS91035 3
90° short bend MS91031 MS91037 2
Wall band MS91052 MS91053 2
Components used
(accessory)
(accessory)

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
11
Example 4: Top to Vertical High Level Kit
This example incorporates two 45 degree bends, a situation commonly encountered when having to route flue
pipe around an obstacle such as a beam. When calculating the horizontal run the 45 degree bends equate to
an additional 500mm per bend.
Taking the ratio diagram as an example we can calculate the flue parameters for a top to vertical flue system.
Total Height = A
Total Horizontal = B
In this example
A = 4.5 Metres B = 1.5 Metres
2 x 45deg bends have been used. The two 45 degree bends increase the horizontal length by one metre.
(500mm extra horizontal length per 45 degree bend).
Total height A = 4.5 Metres
Total Horizontal B = 2.0 Metres
In this example there is sufficient vertical rise for the horizontal run, as shown in the illustration on page 6.
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Description Part No. Quantity
Top to Vertical
High Level Kit
150mm 180mm 1
MS91100 MS91101
1 metre length MS91028 MS91034 5
Adjustable
length MS91045 MS91046 1
45° short bend MS91054 MS91055 2
Wall band MS91052 MS91053 5
Roof flashing MS91063 MS91063 1
Components used
(accessory)

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
12
Example 5: Top to Vertical High Level Kit
The minimum vertical height for a top to vertical flue is two meters of flue and the top to vertical kit
components.
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Description Part No. Quantity
Top to Vertical
High Level Kit
150mm 180mm 1
MS91100 MS91101
1 metre length MS91028 MS91034 2
Wall band MS91052 MS91053 2
Roof flashing MS91063 MS91063 1
Components used
(accessory)

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
13
Example 6: Through Ceilings and Roof Spaces
Fitting a Top to Vertical High Level Flue Kit Through Ceilings and Roof Spaces
When installing balanced flue pipe through a ceiling the use of a ceiling support and fire stop spacer are
recommended. There should be no flue joints at any point as the flue passes through a ceiling.
There should a minimum clearance of 25mm from the flue pipe to any combustible material.
Fire stop spacer
Ceiling support
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Weight of flue
supported here.
Weight of flue
supported here.
No flue joints
between fire
stop spacer
and ceiling
support.
Roof ashing
Description 150mm 180mm
Ceiling support MS91056 MS91057
Fire stop spacer MS91058 MS91059
Roof flashing MS91063 MS91063
Wall band MS91052 MS91053
Components used
(accessory)

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
14
Example 7: Existing Chimney Adapter Kit Vertical Termination
Fitting an Existing Chimney Adapter Kit in Conjunction with a High Level Vertical Kit
There are great advantages in converting an existing chimney into a balanced flue. The existing chimney
adapter kit can convert either ceramic lined chimneys or an unlined chimney into a balanced flue system. By
using this system combustion air is drawn from the outside rather than from the property greatly increasing
overall efficiency.
In addittion many houses chimney stacks have been removed and the
roof tiled over. They are usually capped off at attic floor level.
We have developed a kit which can bring these chimneys back to life
using a gas balanced flue stove.
It can also be used in modern properties which have heat
replacement systems where normal ventilation requirements
cannot be applied.
The system requires the use of two flexible flue liners, one to run
inside the other mimicking the standard balanced flue pipe.
The inside pipe is for the evacuation of the products of
combustion and the outer is the air supply for combustion.
It is imperative that all the joints are sealed
to make them air tight.
There follows two examples of the system,
one is showing an existing chimney breast
and the system terminating in a
vertical position (through the roof).
The second is showing the
system terminating in a horizontal
position (through a gable end of
a property perhaps).
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mimic the balanced flue pipe.
Ensure the seal is tight
to the adapter kit
Depending on which direction your flue configuration will take and the model of the stove, a reduction plate
may or may not be required. See pages 24 & 25 for details.
Flue system
size
Inner liner Outer liner
150mm 101mm / 4” 153mm / 6”
180mm 125mm / 5“ 178mm / 7”
Existing chimney
top adapter
Existing chimney
bottom adapter

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
15
Example 8: Existing Chimney Adapter Kit Horizontal Termination
Fitting an Existing Chimney Adapter Kit in Conjunction with a Top to Horizontal Kit
Clay
liner
Flexible
liner
The example above is showing an existing chimney adapter kit utilizing a existing clay liner, using a flexible
liner to run inside the clay liner in order to expel the products of combustion but using the clay liner for the
feed of combustion air. Ensure that the seals between flexible liner and the adapter are sound and the seal
between the clay liner and the adapter are also sound.
It can go through the long 90° bend (in the top to horizontal kit) and terminate through the gable end of the
property.
75mm
95mm
350mm
100mm
75mm
350mm
Existing chimney bottom adapter
Existing chimney top adapter
Existing chimney top adapter
Existing chimney bottom adapter
Standard kit
90° long bend
If this orientation is to be used then the standard 90 degree long bend from the top to horizontal kit MUST be
used so that the last union before the terminal length T2 is a female (F) end.
Flue system
size
Inner liner Outer liner
150mm 101mm / 4” 153mm / 6”
180mm 125mm / 5“ 178mm / 7”
Accessory 1
metre length
Standard kit
terminal length
T2
Standard kit
starter length
T1
M
M
F
F
T2
T1

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
16
Example 9: Through a Combustible Roof
Installation of Top to Vertical High Level Balanced Flue Pipe Through a Combustible Roof
A 25mm gap of non combustible material must be used when you are passing the balanced flue pipe through
any combustible material.
Conservatories can “come alive” with the installation of a stove, but care should be taken when installing a
stove into a conservatory because the modern ones can be made entirely from plastic (or PVC). Advise from
your conservatory installer/manufacturer should be sought.
The flue system should be supported.
600mm
600mm
600mm

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
17
Frequently Asked Questions
Q. Can the stove be flued directly off the back?
A. Yes, using the standard low level horizontal kit.
Q. Can I use a bend directly off the top of the stove?
A. No, the stove adapter is only designed to fit the telescopic starter length and straight lengths, bends will not
seal to the flue outlet.
Q. Can I fit the stove in the corner of a room?
A. Yes, there is no problem in doing this using the top to horizontal flue kit, but it must be remembered that if
the corner is also the corner of the property that the termination must be 600mm from any corner. See diagram
page 5.
Q. Can the vertical flue be passed through a combustible roof, such as a polycarbonate roof in a conservatory?
A. Yes, as long as allowances are made for the type of roofing material and suitable insulation is provided. See
the section on flueing through a combustible roof.
Q. Can the stove be fitted into a bedroom?
A. Yes, the stoves are room sealed and below 14kW input.
Q. Can I cut the lengths of flue pipe?
A. Yes, however the differential between the inner and outer length has to be maintained. It would be preferable
to use an adjustable length
Q. Does the flue terminal need to be guarded?
A. If the flue terminal is to be sited less than two meters above level ground,
a balcony or a flat roof where people have access, a guard must be fitted. Local
by-laws may also require a further minimum height where the terminal is sited
adjoining a public footpath.
Q. If I have a high level horizontal kit can I then terminate it vertically?
A. Yes, there is a vertical terminal with a crimped end which will fit to the
flue system.
Q. Do I need an air brick or other ventilation for supplying free air to the
stove?
A. No, the stove is room sealed and does not have any requirement for free
air.
Q. Does it matter how far out of the wall the terminal is fitted on a horizontal flue kit?
A. Yes, there should be 12mm of flue pipe visible before the start of the flue terminal. Any greater length can
upset the balanced flues operation.
Q. What colours are the flue pipe available in?
A. The flue pipe is supplied in one colour, a matt grey finish, which closely matches the cast finished stoves and
complements the enamel finished stove. It is possible to change the colour using heat resistant paint.
Q. To what wind speed are the terminals tested to?
A. The maximum wind used is 12.5 m/s with 10% error. (28mph).
Q. What is the maximum length the flue can travel horizontaly from the rear outlet of the stove?
A. The standard low level horizontal flue kit gives a maximum extension of 440mm. No additional lengths or
bends should be fitted.
Vertical terminal with
crimped end
Size Part No:
150mm MS91047
180MM MS91048

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
18
Components of Top to Horizontal High Level Kit
150mm kit MS91102
180mm kit MS91103
This is a high level horizontal flue kit. Other sections may be added to achieve the desired termination. For
additional lengths and accessories see pages 21 to 23.
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T2
Telescopic terminal length
(T2)
90° Long bend
Clamp band
T1
Telescopic starter length (T1)
which must be used as the
first length of flue pipe from
the stoves flue collar
Dimensions of standard 150mm flue kit
Max 555mm
Min 445mm
T1
T2
Max: 555mm
Min: 470mm
12mm
The min can be reduced further by cutting 40mm
off the T2 section
The min can be reduced
further by cutting 40mm
off the T1 section
Dimensions of standard 180mm flue kit

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
19
Components of Top to Vertical High Level Kit
150mm kit MS91100
180mm kit MS91101
This kit is used when the installation requires the termination to be through a roof. Further components will
be required with this kit. For additional lengths and accessories see pages 21 to 24.
Locking Band
Vertical Terminal
Adjustable Starter Pipe
250mm
200mm
T1
Toatal length Minimum Length
for Calculations Maximum Length For Calculations
250mm 30mm 170mm
Adjustable Starter Pipe

© EUROHEAT DISTRIBUTORS (H.B.S) LTD. Technical Guide IN1105 Ed 5 May 2009
20
Components of Rear to Horizontal Low Level Kit
150mm kit MS91097
180mm kit MS91098
Only the standard kit may be used, additional bends and lengths MUST not be used as they will adversely
effect the performance of the balanced flue and could be dangerous.
Telescopic Module
(horizontal adjustable)
Horizontal
Terminal
Terminal Guard
Minimum
Length 310 mm
Maximum
Length 440 mm
Wind shield
T1
Spacers and self tapping
screws for wind shield