Alpha E-Tec Plus 28NX Design, Installation And Servicing Instructions page 12

HORIZONTAL FLUE OPTIONS - Lmax - 12 metres
12 m
A
L = A + B + (90° bend = 1.3 metre)
VERTICAL FLUE OPTIONS
H
Hmax = 14 m
12
Alpha E-Tec Plus 28NX, 33NX and 38NX - General Boiler Information
B
Fig. 4.1
Not less than
300 mm
Fig. 4.2
B
L = A + B = 12m max.
L = A + (2 x 45° bends = 1.8 metre)
H
Hmax = 12.2 m (14 m - 1.8 m)
A
A
Not less than
300 mm