IDEAL EVOMAX 2 30 Installation And Servicing

2.15 PERMISSIBLE FLUE LENGTH
The maximum permissible ue lengths for each model is shown in Table A below, these lengths are inclusive of the
terminal resistance.
The value shown is the max available length for extension.
The equivalent length of elbows is shown in Table B.
Table B
Equivalent Length of Elbows (meters)
Concentric Open Flue
Size 80/125 100/150 80 100
45º 0.85 1.25 0.45 0.60
90º 1.6 1.9 1.0 1.0
Table A
Max Permissible Equivalent Flue Length (inc terminal resistance) meters
Concentric Open Flue
Flue Size 80/125 100/150 80 100
Model
30/30P 33 - 65 -
40/40P 30 - 70 -
60/60P 17.5 28 25 -
80/80P 10 18 15.3 -
100/100P - 10 - 20
120/120P - 9 - 34
150 - 6 - 32
Table D
Maximum lengths
Model Flue Size Reduction per Additional Metre
30/30P 80/125mm 0.15% (up to 42m max ue)
40/40P 80/125mm 0.16% (up to 42m max ue)
60/60P 80/125mm Max ue 17.5m
80/80P 80/125mm 0.5% (up to max 12m max ue)
60/60P 100/150mm 0.18% (up to 30m max ue)
80/80P 100/150mm 0.27% (up to 35m max ue)
100/100P 100/150mm 0.5% (up to 14.3m max ue)
120/120P 100/150mm 0.55% (up to 16.0m max ue)
150 100/150mm 0.8% (up to 7.5m max ue)
Table C
19 Examples of Flue Length Calculation
Example
Max Permissible
Equivalent
Length (Table A)
Elbows
Max permissible
Straight Length
Model
Flue
Type
Type
Equivalent
Length
(Table B)
No
Total
Equivalent
Length
60 80/125 17.5 90 1.6 2 3.2 14.3
60 100/150 28 90 1.9 2 3.8 24.2
80 80/125 10 90 1.6 3 4.8 5.2
120 100/150 9 90 1.9 4 7.6 1.4
Maximum lengths due to the resistance presented by extended concentric ue lengths a slight reduction in the maximum
boiler output will occur where ue lengths exceed the stated lengths. In such cases the boiler output will be reduced up to
0.8% per additional metre and should not exceed those stated in Table D.
21
Installation & Servicing
SECTION 2 - INSTALLATION
FLUE OUTLET

IDEAL EVOMAX 2 30 Specifications

General

Brand	IDEAL
Model	EVOMAX 2 30
Category	Boiler
Language	English