Thermador HMCN42FS Installation Instructions - Page 5

PRIOR TO INSTALLATION Step 1: EXHAUST-AIR MODE 8" 8" 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. 5