Thermador HMWN30 Manuel D'installation page 6

Typical installation
The height from the countertop to the bottom of the hood is 30" to 36".
These hoods are not recommended to be used over indoor grills.
1. Choose vent options
The hood is designed to be used for vertical discharge as shown below.
Note: see also Fig. 1-2-3 for Cabinet preparation.
Install a 1/2" conduit from the service panel long enough to reach the hood
once it is installed. Power supply must be rated for 120 VAC, 60Hz. 15 or 20 A.
Ceiling
*Deflector
Lam p
Hood
30" to 36"
RECIRCULATING
* Optional accessory - Ductless recirculation kit
* Only for 30" and 36" using integral blower VTN600F
Examples of possible ducting
Transition
Blower
*Charcoal filters
Filter
Round duct
Ceiling
Lam p
Hood
* Charcoal filters
30" to 36"
VERTICAL DISCHARGE
6
Transition
Blower
Filter