Element4 Bidore 70 User manual

Flue Calculation Manual

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Flue calculation manual
Preface
Element4 gas fires can be situated in almost any room. These are closed system fireplaces (Balanced
Flue fires).
Closed system
Balanced fires do not extract the oxygen for combustion from the living room, but directly from outside
via a concentric flue. The flue gases are discharged through the inner flue pipe whilst the fresh air is
supplied through the outer pipe. This is done via the natural draught system.
All Element4 gas fires are tested for flue gas discharge through the wall (C11), through the roof (C31) or
with flexible exhaust pipes through an existing chimney (C91)
The diameter of the duct can be 150/100 mm or 200/130 mm, depending on the fireplace and the
course of the flue gas duct.
Calculation
For the fireplace to function properly, it is important that the flue gas terminal meets the
requirements. A Calculation scheme has been created to determine this.
The products of Element 4 are divided into categories, each category has its own possibilities and
limitations.
Waste material
The European CE quality mark for Element4 appliances only applies in combination with the drainage
systems tested by Element4.
The appliance must therefore be installed with the Metaloterm / OnTop, Poujoulat or Jeremias
concentric stainless steel flue system. The use of other concentric stainless steel systems is only
permitted if they have the same technical specifications as the aforementioned systems.
Only with the use of these materials can Element4 guarantee safe and proper operation.
Power-Fan MKI and MKII
A Power-fan can be used for flue configurations where natural draught will not allow. For detailed
installation instructions and operation, please refer to the Power-Fan manual.

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Flue calculation manual
Preface ................................................................................................................... 1
Rules for flue gas discharge................................................................................... 3
Flue calculation example...................................................................................... 5
The six questions of flue calculation ............................................................................. 5
Example flue configuration .......................................................................................... 6
Categories ........................................................................................................... 7
Category 1 (Metric) – Ratio 1:4 ..................................................................................... 8
3.1.1 Calculation table horizontal terminal (C11) ....................................................... 8
3.1.2 Calculation table vertical terminal (C31)............................................................ 8
3.1.3 Calculation table pipe diameter 150/100........................................................... 8
Category 2 (Metric) - Ratio 1:2.5 .................................................................................10
3.2.1 Calculation table horizontal terminal (C11) ..................................................... 10
3.2.2 Calculation table vertical terminal (C31) pipe diameter 200/130..................... 10
Category 3 (Metric) – Ratio 1:2 .................................................................................. 11
3.3.1 Calculation table horizontal terminal (C11) pipe diameter 200/130 ................ 11
3.3.2 Calculation table vertical terminal (C31) pipe diameter 200/130..................... 11
Category 4 (Metric) – Ratio 1:1 .................................................................................. 12
3.4.1 Calculation table horizontal terminal (C11) pipe diameter 200/130 ................ 12
3.4.2 Calculation table vertical terminal (C31) pipe diameter 200/130..................... 12
3.4.3 Calculation table vertical terminal (C31) pipe diameter 150/100..................... 12
Category 5 (Metric) – Ratio 2:1 .................................................................................. 13
3.5.1 Calculation table horizontal terminal (C11) pipe diameter 200/130 ................ 13
3.5.2 Calculation table vertical terminal (C31) pipe diameter 200/130..................... 13
3.5.3 Calculation table vertical terminal (C31) pipe diameter 200/130..................... 13
Category 1 (Imperial) – Ratio 1:4 .................................................................................14
3.6.1 Calculation table horizontal terminal (C11) ..................................................... 14
3.6.2 Calculation table vertical terminal (C31).......................................................... 14
3.6.3 Calculation table pipe diameter 6/4 ................................................................ 15
Category 2 (Imperial) - Ratio 1:2.5 ...............................................................................16
3.7.1 Calculation table horizontal terminal .............................................................. 16
3.7.2 Calculation table vertical terminal................................................................... 16
Category 3 (Imperial) – Ratio 1:2 .................................................................................17
3.8.1 Calculation table horizontal terminal pipe diameter 8/5 inch.......................... 17
3.8.2 Calculation table vertical terminal pipe diameter 8/5 inch .............................. 17
Category 4 (Imperial) – Ratio 1:1 .................................................................................18
3.9.1 Calculation table horizontal terminal pipe diameter 8/5 inch.......................... 18
3.9.2 Calculation table vertical terminal pipe diameter 8/5 inch .............................. 18
3.9.3 Calculation table vertical terminal (C31) pipe diameter 150/100..................... 18
Category 5 (Imperial) – Ratio 2:1 .................................................................................19
3.10.1 Calculation table horizontal terminal pipe diameter 8/5................................ 19
3.10.2 Calculation table vertical terminal pipe diameter 8/5 .................................... 19
3.10.3 Calculation table vertical terminal pipe diameter 8/5 inches ......................... 19
Existing Chimney............................................................................................... 20

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Flue calculation manual
Rules for flue gas discharge.
Determine the diameter of the flue gas outlet
The main rule is that you must always run the flue in diameter 200/130mm or 8/5 inches.
Furthermore the flue always starts with a minimal vertical length of 0.5 meters or 20 inches on the
fireplace.
Exceptions
• If the flue spigot outlet on the fireplace itself has a diameter of 150/100 or 6/4 inch, then
corresponding concentric flue may be used.
• If the flue run is only running vertically with no bends then you can use a reducer so you can use
150/100mm or 6/4 inch flue on most Element4 fires – but not all
For Element 4 fireplaces, to not reduce the flue diameter is preferable for optimal operation of the
fireplace. Please also note that not every flue can be reduced. The flue categories state whether or not
a fire can be reduced.
When reducing the flue, regardless of the position of the reduction, you must adhere to the flue
configuration table for a reduced flue (Table 1.3).
Determine Maximum Vertical Length
If you use diameter 200/130 mm or 8/5 inch, your maximum total length is 22 meters / 72 feet.
If you have reduced your flue gas outlet in accordance with the above exception rules to diameter
150/100 mm or 6/4 inch , the total maximum permitted vertical length of your flue gas outlet is 11
meters / 36 feet.
Determine Maximum Horizontal Length
To see if the intended flue will work properly, you must first determine the category in which your fire
falls. After you have determined which category your fire falls into, search for the corresponding
calculation tables.
See chapter 3 - category distribution.
Each category refers has (in any case) two tables:
• A table for a horizontal terminal.
• A table for a vertical terminal.
You take the table that applies to you. You calculate your total vertical length (TVL) and your total
horizontal length (THL). In the table you can read the advice with TVL on the vertical axis and THL on
the horizontal axis.
Calculating Total Vertical Length (TVL):
You calculate the Total Vertical Length by adding up all the vertical rises in the course of the flue run.
Calculate Total Horizontal Length (THL):
You calculate the Total Horizontal length by adding up all horizontal sections in the course of the flue
run.
Important:
Take notice of all the bends in your flue! Bends provide extra resistance in the system and should
therefore be included in the TVL and THL.
There are two types of bends:
• 45  and 90  bends from vertical to horizontal and vice versa. (Type N)
• 45  and 90  bends from horizontal to horizontal (Type Q)

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Flue calculation manual
You do not have to include the first 3 N-bends (from vertical to horizontal) in your calculations. The
next bends of type N are each counted as 1 horizontal meter in the THL.
For a bend of type Q (horizontal to horizontal):
• 90  bend in the horizontal section counts for 2 horizontal meters or 7 feet in the THG.
• 45  bend in the horizontal section counts for 1 horizontal meter or 3,5 feet in the THG.
Flue sections in a 45  rising pipe:
Rising sections under an angle 45  are calculated both vertically and horizontally.
Explanation results table
Read in the table at the TVL and THL you have determined a
X - The installation is not allowed.
V – The installation is allowed, but there is no need to install a restrictor.
R - The installation is allowed, but a restrictor needs to be fitted.
Depending on the discharge situation, you must use one of the supplied flue gas restrictors. As
standard, three flue gas restrictors are supplied with the device (with some exceptions). It is highly
dependent on the desired discharge situation which flue gas restrictors must be installed. The exact
position of the flue gas restrictors is indicated in the installation manual supplied with the fireplace.
Position of the restrictor plate (differing per fire).
Please note: When the result of the desired flue is an “X”, proper functioning of the fire is not
guaranteed. In this case the PowerFan might be a good solution.
Verstelbaar

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Flue calculation manual
Flue calculation example
The six questions of flue calculation
To find out whether the desired flue configuration is possible for your fireplace, the following six
questions can be asked:
1. In what category is the fire that is to be installed.
Use the table in chapter 3 as a guideline .
2. What is the desired flue diameter?
Please note that this question is only relevant when one wishes to reduce the flue diameter.
3. Does your flue have a vertical or horizontal terminal?
Depending on the answer choose table 1.1. or 1.2 from the category from question 1.
4. What is the Total Vertical Length?
Add all the vertical sections of the flue.
Do not forget the extra resistance of the bends to add to the THL.
5. What is the Total Horizontal Length?
Add all the horizontal sections of the flue.
Do not forget the extra resistance of the bends.
6. Which result can be found when all the answers found above are combined?
Check the cross product of the TVL and THL in the corresponding table.
The different possibilities are V, X or R

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Flue calculation manual
Example flue configuration
Horizontal or vertical terminal
R
Bend 45° & 90° vertical to horizontal and vice versa
N
Bend 45° & 90° horizontal to horizontal
Q
Pipe section horizontal
T
Pipe section vertical
S

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Flue calculation manual
Categories
Name of the device
Spigot diameter
Category
Metric
Imperial
Bidore 70
200/130
8 / 5 inches
1
Bidore 100
200/130
8 / 5 inches
1
Bidore 140
200/130
8 / 5 inches
3
Bidore 240H
200/130
8 / 5 inches
5
Bioptica
150/100
6 / 4 Inches
2
Club 140
200/130
8 / 5 inches
3
Club 240
200/130
8 / 5 inches
5
Cupido 50
150/100
6 / 4 Inches
2
Cupido 50 met Real Flame Burner
150/100
6 / 4 Inches
1
Cupido 70
150/100
6 / 4 Inches
2
Cupido 70 met Real Flame Burner
150/100
6 / 4 Inches
1
Lucius 100
200/130
8 / 5 inches
4
Lucius 140
200/130
8 / 5 inches
3
Lucius 240H
200/130
8 / 5 inches
5
Modore 70
200/130
8 / 5 inches
1
Modore 75H
200/130
8 / 5 inches
4
Modore 100
200/130
8 / 5 inches
1
Modore 140
200/130
8 / 5 inches
3
Modore 185
200/130
8 / 5 inches
5
Modore 240
200/130
8 / 5 inches
5
Modore 240H
200/130
8 / 5 inches
5
Optica
150/100
6 / 4 Inches
2
Sky
200/130
8 / 5 inches
2
Sky T
200/130
8 / 5 inches
2
Sky Medium
200/130
8 / 5 inches
2
Summum 70
200/130
8 / 5 inches
1
Summum 100
200/130
8 / 5 inches
2
Summum 140
200/130
8 / 5 inches
4
Tenore 100
200/130
8 / 5 inches
4
Tenore 240
200/130
8 / 5 inches
5
Tenore 240H
200/130
8 / 5 inches
5
Trisore 70
200/130
8 / 5 inches
1
Trisore 100
200/130
8 / 5 inches
1
Trisore 140
200/130
8 / 5 inches
3

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Flue calculation manual
Category 1 (Metric) – Ratio 1:4
The tables below are the same for fireplaces with spigot diameter 200/130 and 150/100. Fires in this
category are never to be reduced to ensure a correctly functioning fireplace.
3.1.1 Calculation table horizontal terminal (C11)
3.1.2 Calculation table vertical terminal (C31)
For a vertical terminal a minimal starting length of 0,5m is required and - Total Vertical Length is 1 m.
3.1.3 Calculation table pipe diameter 150/100
Please note: This table is only applicable when flue is reduced. Fireplaces with a 150/100 spigot do not
apply to this table, but instead table 3.1.1 or 3.1.2 is to be used.
11 RRRRRRRRRRRVVVVV
10 RRRRRRRRRRRVVVVV
9R R RRRRRR R RRVV V VV
8RRRRRR R RR R RVVVVV
7RRRRRR R RR R RV V V V V
6RRRRRRRRRRRVV V VV
5RR R RRRRRRRRV V VVV
4R R RRRRRRRRVVVV V V
3,5 RRRRRRRRRRVVVV V V
3VVVV V VVVVVVVV V V V
2,5 VV V V V VVVVVVVV V VV
2VVVVVVVVVVVVV V V V
1,5 V V VVV V VVVVVVXX X X
1VVVVV V VVXXXXXXX X
0,5 VV V VXXX X XXXXX X XX
0,5 11,5 22,5 33,5 44,5 55,5 66,5 77,5 8
Total vertical Length
Total Horizontal Length
22 VVXXXXXXXXXXXXXXX
21 RRVVXXXXXXXXXXXXX
20 RRRRVVXXXXXXXXXXX
19 RRRRRRVVXXXXXXXXX
18 RRRRRRRRVVXXXXXXX
17 RRRRRRRRRRVVXXXXX
16 RRRRRRRRRRRRVVXXX
15 RRRRRRRRRRRRVVVVX
14 RRRRRRRRRRRRVVVVV
13 RRRRRRRRRRRRVVVVV
12 RRRRRRRRRRRRVVVVV
11 RRRRRRRRRRRRVVVVV
10 RRRRRRRRRRRRVVVVV
9RRRRRRRRRRRRVVVVV
8RRRRRRRRRRRRVVVVV
7RRRRRRRRRRRRVVVVV
6RRRRRRRRRRRRVVVVV
5RRRRRRRRRRRRVVVVV
4RRRRRRRRRRRRVVVVV
3,5 RRRRRRRRRRRRVVVVV
3VVVVVVVVVVVVVVVVV
2,5 VVVVVVVVVVVVVVVVV
2VVVVVVVVVVVVVVVVV
1,5 VVVVVVVVVVVVVXXXX
1VVVVVVVVVXXXXXXXX
00,5 11,5 22,5 33,5 44,5 55,5 66,5 77,5 8
Total vertical Length
Total Horizontal Length

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Flue calculation manual
For a vertical terminal a Total Vertical Length of at least 2 meter is necessary!
11 VVXXXXX
10 RRVVXXX
9RRRRVVX
8RRRRRRV
7RRRRRRV
6RRRRRRV
5RRRRRVX
4RRRRVX X
3,5 RRRVXXX
3VVVVXXX
2,5 VVVVXXX
2VVVVXXX
1,5 VXXXXXX
1VXXXXXX
00,5 11,5 22,5 3
Total Horizontal Length
Total Vertical Length

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Flue calculation manual
Category 2 (Metric) - Ratio 1:2.5
The tables below are the same for fireplaces with spigot diameter 200/130 and 150/100. Fires in this
category are never to be reduced to ensure a correctly functioning fireplace.
3.2.1 Calculation table horizontal terminal (C11)
3.2.2 Calculation table vertical terminal (C31) pipe diameter 200/130
For a vertical terminal a minimal starting length of 0,5m and minimal Total Vertical Length of 1 m is
required.
11 RRRRRRVV V
10 RRRRRRVVV
9RRRRRRV V V
8RRRRRRVVV
7RRRRRRV V V
6RRRRRRVVV
5RRRRRRVVV
4RRRRRRVVV
3.5 RRRRRRVVV
3VVVVVVVVV
2.5 VVVVVVVVV
2VVVVVVVVV
1.5 VVVVVVVX X
1VVVVVXXXX
0.5 VVVXXXXXX
00,5 1 2 2.5 3.5 44.5 5
Total Vertical Length
Total Horizontal Length
22 VXXXXXXXX
21 VVVXXXXXX
20 RRVVXXXXX
19 RRRVVXXXX
18 RRRRVVVVX
17 RRRRRRRV V
16 RRRRRRRRV
15 RRRRRRRRV
14 RRRRRRRRV
13 RRRRRRRRV
12 RRRRRRRRV
11 RRRRRRRRV
10 RRRRRRRRV
9RRRRRRRRV
8RRRRRRRRV
7RRRRRVVVV
6RRRRRVVVV
5RRRRRVVVV
4RRRRRVVVV
3.5 RRRRRVVVV
3VVVVVVVVV
2.5 VVVVVVVVX
2VVVVVVVX X
1.5 VVVVVVXXX
1VVVVVXXXX
00,5 1 2 2.5 3.5 44.5 5
Total Horizontal Length
Total Vertical Length

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Flue calculation manual
Category 3 (Metric) – Ratio 1:2
3.3.1 Calculation table horizontal terminal (C11) pipe diameter 200/130
3.3.2 Calculation table vertical terminal (C31) pipe diameter 200/130
For a vertical terminal a minimal starting length of 0,5m and minimal Total Vertical Length of 1 m is
required.
11 RRRRRRRRRRR
10 RRRRRRRRRRR
9RRRRRRRRRRV
8RRRRRRRRRRV
7RRRRRRRRRRV
6RRRRRRRRRRV
5RRRRRRVVVVV
4RRRRVVVVVVV
3VVVVVVVVVVV
2VVVVVVVVVX X
1VVVVVVXXXXX
0,5 XXVVXXXXXXX
00,5 11,5 22,5 33,5 44,5 5
Total Horizontal Length
Total Vertical Length
22 VVXXXXXXXXXXX
21 RVVVXXXXXXXXX
20 RRRVVVXXXXXXX
19 RRRRRVVVXXXXX
18 RRRRRRRVVVXXX
17 RRRRRRRRRVVVX
16 RRRRRRRRRRRV V
15 RRRRRRRRRRRRV
14 RRRRRRRRRRRRV
13 RRRRRRRRRRRRV
12 RRRRRRRRRRRRV
11 RRRRRRRRRRRRV
10 RRRRRRRRRRRRV
9RRRRRRRRRRRRV
8RRRRRRRRRRRRV
7RRRRRRRRRRRV V
6RRRRRRRRRRVVX
5RRRRRRRRRVVVX
4RRRRRRRRVVVVX
3VVVVVVVVVVVVX
2VVVVVVVVVVXXX
1VVVVVVXXXXXXX
00,5 11,5 22,5 33,5 44,5 55,5 6
Total Horizontal Length
Total Vertical Length

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Flue calculation manual
Category 4 (Metric) – Ratio 1:1
3.4.1 Calculation table horizontal terminal (C11) pipe diameter 200/130
3.4.2 Calculation table vertical terminal (C31) pipe diameter 200/130
For a vertical terminal a minimal starting length of 0,5m and minimal Total Vertical Length of 1 m is
required.
3.4.3 Calculation table vertical terminal (C31) pipe diameter 150/100
When the flue is exclusively vertical, it may be reduced to a diameter 150/100mm flue pipe, given the
Total Vertical Length is a minimum of 2 meters. In this case you do not have to use a restriction plate.
10 RRRRRV V
9RRRRRV V
8RRRRRV V
7RRRRRV V
6RRRRRV V
5RRRRRV V
4RRRRRV V
3.5 RRRRRV V
3VVVVVVV
2.5 VVVVVVX
2VVVVVX X
1.5 VVVVXXX
1VVVXXXX
0.5 XVXXXXX
00.5 11.5 22.5 3
Total Horizontal Length
Total Vertical Length
22 VX X XXXXXX
21 RRVXXXXXX
20 RRRRVXXXX
19 RRRRRRVX X
18 RRRRRRVVV
17 RRRRRRVVV
16 RRRRRRVVV
15 RRRRRRVVV
14 RRRRRRVVV
13 RRRRRRVVV
12 RRRRRRVVV
11 RRRRRRVVV
10 RRRRRRVVV
9RRRRRRVVV
8RRRRRRVVV
7RRRRRRVVX
6RRRRRRVVX
5RRRRRRVVX
4RRRRRRVX X
3.5 RRRRRRVX X
3VVVVVVVX X
2.5 VVVVVVXXX
2VVVVVXXXX
1.5 VVVVXXXXX
1VVVXXXXXX
00,5 11.5 22,5 33,5 4
Total Horizontal Length
Total Vertical Length

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Flue calculation manual
Category 5 (Metric) – Ratio 2:1
Fires in this category are never to be reduced to flue diameter 150/100mm.
For the Modore /Tenore 240 a restriction plate is never necessary.
3.5.1 Calculation table horizontal terminal (C11) pipe diameter 200/130
3.5.2 Calculation table vertical terminal (C31) pipe diameter 200/130
For a vertical terminal a minimal starting length of 0,5m is required and - Total Vertical Length is 1 m.
3.5.3 Calculation table vertical terminal (C31) pipe diameter 200/130
When the flue is exclusively vertical, it may be reduced to a diameter 150/100mm flue pipe
Given the Total Vertical Length is a minimum of 2 meters.
In this case you do not have to use a restriction plate.
10 RRRV V V V
9RRRRRV V
8RRRRRV V
7RRRRRV V
6RRRRRV V
5RRRRRVX
4RRRRRX X
3VVVVXXX
2VVVXXXX
1VVXXXXX
0.5 XXXXXXX
00.5 11.5 22.5 3
Total Horizontal Length
Total Vertical Length
22 VVVXXXX
21 RRVVVX X
20 RRRRVVV
19 RRRRRRV
18 RRRRRRV
17 RRRRRRV
16 RRRRRRV
15 RRRRRRV
14 RRRRRRV
13 RRRRRRV
12 RRRRRRV
11 RRRRRRV
10 RRRRRRV
9RRRRRRV
8RRRRRV V
7RRRRRV V
6RRRRRVX
5RRRRRVX
4RRRRVX X
3VVVVXXX
2VVVXXXX
1VVXXXXX
00,5 11.5 22,5 3
Total Horizontal Length
Total Vertical Length

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Flue calculation manual
Category 1 (Imperial) – Ratio 1:4
The tables below are the same for fireplaces with spigot diameter 8/5 and 6/4. Fires in this category
are never to be reduced to ensure a correctly functioning fireplace.
3.6.1 Calculation table horizontal terminal (C11)
3.6.2 Calculation table vertical terminal (C31)
For a vertical terminal a minimal starting length of 20“ is required and - Total Vertical Length is 3‘.
36' RRRRRRRRRRRRVVVV
33' RRRRRRRRRRRRVVVV
30' RRRRRRRRRRRRVVVV
27' RRRRRRRRRRRRVVVV
24' RRRRRRRRRRRRVVVV
21' RRRRRRRRRRRRVVVV
18' RRRRRRRRRRRRVVVV
15' RRRRRRRRRRRRVVVV
13'6" RRRRRRRRRRRVVVVV
12' RRRRRRRRRRVVVVVV
10'6" RRRRRRRRRVVVVVVV
9' VVVVVVVVVVVVVVVV
7'6" VVVVVVVVVVVVVVVV
6' VVVVVVVVVVVVVVVV
4'6" VVVVVVVVVVVVXXXX
3' VVVVVVVVXXXXXXXX
20" VVVVXXXXXXXXXXXX
20" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
16'6"
18'
19'6"
21'
22'6"
24'
Total vertical Length
Total Horizontal Length
72' VVXXXXXXXXXXXXXXX
69' RRVVXXXXXXXXXXXXX
66' RRRRVVXXXXXXXXXXX
63' RRRRRRVVXXXXXXXXX
60' RRRRRRRRVVXXXXXXX
57' RRRRRRRRRRVVXXXXX
54' RRRRRRRRRRRRVVXXX
51' RRRRRRRRRRRRRVVVX
48' RRRRRRRRRRRRRVVVX
45' RRRRRRRRRRRRRVVVV
42' RRRRRRRRRRRRRVVVV
39' RRRRRRRRRRRRRVVVV
36' RRRRRRRRRRRRRVVVV
33' RRRRRRRRRRRRRVVVV
30' RRRRRRRRRRRRRVVVV
27' RRRRRRRRRRRRRVVVV
24' RRRRRRRRRRRRRVVVV
21' RRRRRRRRRRRRRVVVV
18' RRRRRRRRRRRRRVVVV
15' RRRRRRRRRRRRRVVVV
13'6" RRRRRRRRRRRRVVVVV
12' RRRRRRRRRRRVVVVVV
10'6" RRRRRRRRRRVVVVVVV
9' VVVVVVVVVVVVVVVVV
7'6" VVVVVVVVVVVVVVVVV
6' VVVVVVVVVVVVVVVVV
4'6" VVVVVVVVVVVVVXXXX
3' VVVVVVVVVXXXXXXXX
020" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
16'6"
18'
19'6"
21'
22'6"
24'
Total Horizontal Length
Total vertical Length

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Flue calculation manual
3.6.3 Calculation table pipe diameter 6/4
Please note: This table is only applicable when flue is reduced. Fireplaces with a 6/4 spigot do not
apply to this table, but instead table 3.1.1 or 3.1.2 is to be used.
For a vertical terminal a Total Vertical Length of at least 7 feet is necessary!
36' VVXXXXX
33' RRVVXXX
30' RRRRVVX
27' RRRRRRV
24' RRRRRRV
21' RRRRRRV
18' RRRRRRV
15' RRRRRVX
13'6" RRRRVX X
12' RRRVXXX
10'6" RRRVXXX
9' VVVVXXX
7'6" VVVVXXX
6' VVXXXXX
020" 3' 4'6" 6' 7'6" 9'
Total Horizontal Length
Total Vertical Length

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Flue calculation manual
Category 2 (Imperial) - Ratio 1:2.5
The tables below are the same for fireplaces with spigot diameter 8/5 and 6/4. Fires in this category
are never to be reduced to ensure a correctly functioning fireplace.
3.7.1 Calculation table horizontal terminal
3.7.2 Calculation table vertical terminal
For a vertical terminal a minimal starting length of 20“ and minimal Total Vertical Length of 3‘ is
required.
36' RRRRRRRVVVV
33' RRRRRRRVVVV
30' RRRRRRRVVV V
27' RR R RRRRVVVV
24' RRRRRRRVVV V
21' RRRRR R RVVV V
18' R R RRRRRV V V V
15' RRRRRRRV V V V
13'6" R R RRRR R VVVV
12' RRRRRRRVVVV
10'6" RRRRRR R VVVV
9' V V V V VVV V V V V
7'6" V V VVV V VVVV V
6' V V VVVVVVVVX
4'6" VVVVVVVXXXX
3' VVVV V XXXXXX
20" VVVXXXXXXXX
20" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
16'6"
Total vertical Length
Total Horizontal Length
72' VVXXXXXXXXX
69' RVVVXXXXXXX
66' RRRVVVXXXXX
63' RRRRRVVVXXX
60' RRRRRRRVVVX
57' RRRRRRRRVVV
54' RRRRRRRRRRV
51' RRRRRRRRRRR
48' RRRRRRRRRRR
45' RRRRRRRRRRR
42' RRRRRRRRRRR
39' RRRRRRRRRRR
36' RRRRRRRRRRR
33' RRRRRRRRRRR
30' RRRRRRRRRRR
27' RRRRRRRRRRR
24' RRRRRRVVVVV
21' RRRRRRVVVVV
18' RRRRRRVVVVV
15' RRRRRRVVVVV
13'6" RRRRRRVVVVV
12' RRRRRRVVVVV
10'6" RRRRRRVVVVV
9' VVVVVVVVVVV
7'6" VVVVVVVVVVV
6' VVVVVVVVVVX
4'6" VVVVVVVXXXX
3' VVVVVXXXXXX
020" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
Total Horizontal Length
Total vertical Length

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Flue calculation manual
Category 3 (Imperial) – Ratio 1:2
3.8.1 Calculation table horizontal terminal pipe diameter 8/5 inch
3.8.2 Calculation table vertical terminal pipe diameter 8/5 inch
For a vertical terminal a minimal starting length of 20“ and minimal Total Vertical Length of 3‘ is
required.
36' RRRRRRRRRRR
33' RRRRRRRRRRR
30' RRRRRRRRRRV
27' RRRRRRRRRRV
24' RRRRRRRRRRV
21' RRRRRRRRRRV
18' RRRRRRRRRRV
15' RRRRRRVVVVV
13'6" RRRRVVVVVVV
12' RRRRVVVVVVV
10'6" RRRRVVVVVVV
9' VVVVVVVVVVV
7'6" VVVVVVVVVX X
6' VVVVVVVVXXX
4'6" VVVVVVXXXXX
3' VVVVXXXXXXX
20" VVXXXXXXXXX
20" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
16'6"
Total Horizontal Length
Total vertical Length
72' VVVXXXXXXXXX
69' RVVVXXXXXXXX
66' RRRVVVXXXXXX
63' RRRRRVVVXXXX
60' RRRRRRRVVVX X
57' RRRRRRRRVVVV
54' RRRRRRRRRRV V
51' RRRRRRRRRRRR
48' RRRRRRRRRRRR
45' RRRRRRRRRRRR
42' RRRRRRRRRRRR
39' RRRRRRRRRRRR
36' RRRRRRRRRRRR
33' RRRRRRRRRRRR
30' RRRRRRRRRRRR
27' RRRRRRRRRRRR
24' RRRRRRRRRRRR
21' RRRRRRRRRRRR
18' RRRRRRRRRRRV
15' RRRRRRRRRRV V
13'6" RRRRRRRRRVVV
12' RRRRRRRRRVVV
10'6" RRRRRRRRRVVV
9' VVVVVVVVVVVV
7'6" VVVVVVVVVVVV
6' VVVVVVVVVVX X
4'6" VVVVVVVXXXXX
3' VVVVVXXXXXXX
020" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
16'6"
Total vertical Length
Total Horizontal Length

18
Flue calculation manual
Category 4 (Imperial) – Ratio 1:1
3.9.1 Calculation table horizontal terminal pipe diameter 8/5 inch
3.9.2 Calculation table vertical terminal pipe diameter 8/5 inch
For a vertical terminal a minimal starting length of 20“ and minimal Total Vertical Length of 3‘ is
required.
3.9.3 Calculation table vertical terminal (C31) pipe diameter 150/100
When the flue is exclusively vertical, it may be reduced to a diameter 150/100mm flue pipe, given the
Total Vertical Length is a minimum of 2 meters. In this case you do not have to use a restriction plate.
36' RRRR R VVVVVV
33' RRRRRVVVVVV
30' RRRRRVVVVVV
27' RRRRRVVVVVV
24' RRRRRVVVVVV
21' RRRRRVVVVVV
18' RRRRRVVVVVV
15' RRRRRVVVVVX
13'6" RRRRVVVVVX X
12' RRRRVVVVXXX
10'6" RRRRVVVXXXX
9' VVVVVVXXXXX
7'6" VVVVVXXXXXX
6' VVVVXXXXXXX
4'6" VVVXXXXXXXX
3' VVXXXXXXXXX
20" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
15'
16'6"
Total Horizontal Length
Total vertical Length
72' VVVXXXXXXX
69' RRVVXXXXXX
66' RRRRVVXXXX
63' RRRRRRVVX X
60' RRRRRRVVVV
57' RRRRRRVVVV
54' RRRRRRVVVV
51' RRRRRRVVVV
48' RRRRRRVVVV
45' RRRRRRVVVV
42' RRRRRRVVVV
39' RRRRRRVVVV
36' RRRRRRVVVV
33' RRRRRRVVVV
30' RRRRRRVVVV
27' RRRRRRVVVV
24' RRRRRRVVVV
21' RRRRRRVVVV
18' RRRRRRVVVV
15' RRRRRRVVVV
13'6" RRRRRRVVVV
12' RRRRRRVVVX
10'6" RRRRRRVVX X
9' VVVVVVVXXX
7'6" VVVVVVXXXX
6' VVVVVXXXXX
4'6" VVVVXXXXXX
3' VVVXXXXXXX
020" 3' 4'6" 6' 7'6" 9'
10'6"
12'
13'6"
Total vertical Length
Total Horizontal Length

19
Flue calculation manual
Category 5 (Imperial) – Ratio 2:1
Fires in this category are never to be reduced to flue diameter 6“/4“.
For the Modore /Tenore 240 a restriction plate is never necessary.
3.10.1 Calculation table horizontal terminal pipe diameter 8/5
3.10.2 Calculation table vertical terminal pipe diameter 8/5
For a vertical terminal a minimal starting length of 20“ is required and - Total Vertical Length is 3‘.
3.10.3 Calculation table vertical terminal pipe diameter 8/5 inches
When the flue is exclusively vertical, it may be reduced to a diameter 6/4 inches flue pipe given the
Total Vertical Length is a minimum of 7 feet. In this case you do not have to use a restriction plate.
33' RRVVVV
30' RRRRV V
27' RRRRV V
24' RRRRV V
21' RRRRV V
18' RRRRVX
15' RRRVVX
13'6" RRRVX X
12' RRVVX X
10'6" RRVXXX
9' VVVXXX
7'6" VVXXXX
6' VVXXXX
4'6" VXXXXX
3' VXXXXX
20" 3' 4'6" 6' 7'6" 9'
Total Horizontal Length
Total vertical Length
72' VVVXXXX
69' RRVVXXX
66' RRRRVVX
63' RRRRRRV
60' RRRRRRV
57' RRRRRRV
54' RRRRRRV
51' RRRRRRV
48' RRRRRRV
45' RRRRRRV
42' RRRRRRV
39' RRRRRRV
36' RRRRRRV
33' RRRRRRV
30' RRRRRRV
27' RRRRRRV
24' RRRRRV V
21' RRRRRV V
18' RRRRRVX
15' RRRRVVX
13'6" RRRRVX X
12' RRRVVX X
10'6" RRRVXXX
9' VVVVXXX
7'6" VVVXXXX
6' VVVXXXX
4'6" VVXXXXX
3' VVXXXXX
020" 3' 4'6" 6' 7'6" 9'
Total Horizontal Length
Total vertical Length