Thermador DOWNDRAFT HDDW 36DS - Manual (Page 5)

PAGE 3
PRIOR TO INSTALLATION
Step 1: EXHAUST-AIR MODE
The exhaust air is discharged upwards through a duct or
directly through the outside wall into the open.
D Exhaust air should neither be directed into a smoke or
exhaust flue that is currently used for other purposes, nor
into a duct that is used for ventilating rooms in which
stoves or fireplaces are also located.
Exhaust air may be discharged in accordance with
official and statutory regulations only (e.g. national
building regulations).
Local authority regulations must be observed when
discharging air into smoke or exhaust flues that are not
otherwise in use.
D When the hood is operated in exhaust-air mode
simultaneously with a different burner which also
makes use of the same chimney (such as gas, oil or
coal-fired heaters, continuous-flow heaters, hot-water
boilers) care must be taken to ensure that there is an
adequate supply of fresh air which will be needed by
the burner for combustion.
Safe operation is possible provided that the underpressure
in the room where the burner is installed does not exceed
4 Pa (0.04 mbar).
This can be achieved if combustion air can flow through
non-lockable openings, e.g. in doors, windows and via the
air-intake/exhaust-air wall box.
If the air intake is inadequate, there is a risk of
poisoning from combustion gases which are drawn
back into the room.
ṇ
WARNING – Avoid risk of poisoning – If the air intake
to the room is inadequate, there is a risk of poisoning from
combustion gases which can be drawn back into the
room.
Note: When assessing the overall requirement, the
combined ventilation system for the entire household must
be taken into consideration. This rule does not apply to
the use of cooking appliances, such as hobs and ovens.
If the exhaust air is going to be discharged into the
open, a telescopic wall box should be fitted into the
outside wall.