IDEAL EVOMAX 2 100 Product & Flue Guide

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For concentric flue systems with elbows fitted, use the table to correct the maximum flue extension capability.
Alternatively use the table to design the flue system, deducting the individual resistance of components from
the maximum pressure drop allowed in the flue for that boiler. The maximum pressure drop allowed in the flue is
given below.
The maximum permissible flue lengths for each model are shown in Table 1 below, these lengths are inclusive of
the terminal resistance. The value shown is the maximum available length for extension. The equivalent length of
elbows is shown in Table 2.
FLUE RESISTANCES
FLUE SYSTEMS
TABLE 1 TABLE 2
MAX PERMISSIBLE EQUIVALENT FLUE LENGTH
(INC TERMINAL RESISTANCE) METRES
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 - 10 - 20
120 - 9 - 49
150 - 6 - 32
EQUIVALENT LENGTH OF ELBOWS (METRES)
CONCENTRIC OPEN FLUE
Size 80/125 100/150 80 100
45˚ 0.85 1.25 0.45 0.60
90˚ 1.6 1.9 1.0 1.0
EXAMPLES OF FLUE LENGTH CALCULATION
MODEL FLUE TYPE
MAX
PERMISSIBLE
EQUIVALENT
LENGTH
(TABLE 1)
ELBOWS
MAX
PERMISSIBLE
STRAIGHT
LENGTH
TYPE
EQUIVALENT
LENGTH
(TABLE 2)
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
PERMISSIBLE FLUE LENGTH

IDEAL EVOMAX 2 100 Specifications

General

Brand	IDEAL
Model	EVOMAX 2 100
Category	Boiler
Language	English