87
en
Healthbox
®
II (Compact) & Healthbox
®
Smartzone
• In order to bring the pressure drop via the air ducts for extraction to a reasonable level, the
following indicative values can be taken for the maximum connection lengths:
Easyflex ducts
Air flow
oval flexible
rigid
round
Ø80
round
Ø125
# rigid bends
90° (*)
Maximum connection
length = combined
length oval / round
(**)
25 m³/h
–
•
–
4
25 metres
•
•
–
4
25 metres
50 m³/h
–
•
–
4
15 metres
•
•
–
4
7 metres
•
–
•
4
15 metres
–
–
•
4
25 metres
60 m³/h
•
–
•
4
12 metres
–
–
•
4
25 metres
75 m³/h
•
–
•
4
8 metres oval
+ 6 metres round
•
(2 pipes
parallel)
–
•
4
15 metres
–
–
•
4
25 metres
150 m³/h
•
(2 pipes
parallel)
–
•
2
8 metres
–
–
•
2
10 metres
(*) – in a combination with an oval flexible rigid duct with round duct, 2 flexible/round adapters will be
charged additionally.
(**) – Total extraction line = combined air duct oval + round.
– Bend (flexible aluminium) not charged with the ventilator unit and with the extraction grille.
– Allows for a maximum pressure loss of approx. 80 Pa (+ pressure loss of the extractor must be added
separately).
7.5.2 • Air duct for discharge
• Use the RENSON* facade or gland. This is designed to function with a low pressure loss.
• Avoid sharp bends (< 90°) in the discharge line. A gentle bend creates less pressure loss and
less noise.
• Min. 0.5 m straight pipe (hose) downline of the ventilator unit before a bend may be used in
the discharge line.
• Indicative value for length of flexible aluminium discharge line (Aludec/lsodec): straight hose!
Ø Flexible
Maximum nominal air flow
Max. length of discharge line (max. 1 bend)
Ø125
150 m
3
/h
2,5 m
275 m
3
/h
1,5 m
Ø150
275 m
3
/h
2,5 m
375 m
3
/h
1,5 m
• In order to prevent the formation of condensation in the ducts, insulated lines should be used if
these lines are located outside the insulated volume of the apartment.
