Thermador PH36GS, PH54GS, PH48HS Ductwork Preparation, Considerations Before Installing Hood

Tools and Parts Needed

Aluminum tape (DO NOT use duct tape)

1/2” (13 mm) Conduit if required (follow local codes)

1” (25.4 mm) Strain relief

EXTNCB25 – 25 ft. Blower Connector Cable for distances up to 25 ft.

Ducting as needed

Blower

Flat head and phillips screwdrivers

Drill with 3/16” (4.76 mm) drill bit

3/8” (9.52 mm) nut driver or socket and ratchet

Wire stripper

Protective work gloves

Optional accessories available for separate purchase. Refer to www.thermador.com for more details.

Duct Cover

Keep Hot Shelf

Backsplash

Remove all tape and packaging before using the appliance. Please, recycle the packaging material, as all THERMADOR® appliance packaging material is recyclable. Never allow children to play with packaging material.

NOTE:

Do not throw away any packaging until appliance is fully installed.

Considerations Before Installing Hood

•The installation height ranges from a minimum height of 30” (762 mm) to a maximum height of 40”

(1,016 mm); however, it is necessary to follow the cooking appliance manufacturer’s installation instructions for proper hood height.

•Hood installation height above a rangetop or range can vary. To obtain the necessary installation height above a THERMADOR PROFESSIONAL® rangetop or range, consult the appliance's installation manual.

•For indoor grill installations, THERMADOR® recommends a minimum of 36" (914 mm) clearance and remote and inline blowers only.

•Remote blowers require a five wire installation.

•Hood must be vented to the outside of building only.

English 4

Ductwork Preparation

Ducting Recommendations

Proper performance is dependent upon proper ducting. Local building codes may require the use of make-up air systems when using ducted ventilation systems greater than speci¿ed cubic feet per minute (CFM) of air movement. The speci¿ed CFM varies from locale to locale. It is the responsibility of the owner and the installer to determine if additional requirements and/or standards apply to specific installations.

DO NOT USE FLEXIBLE DUCT; it creates back pressure/ air turbulence and reduces performance. Always use metal ductwork with a minimum diameter of 6” (150 mm).

Always install a metal vent cover where the ductwork exits the house.

COLD WEATHER installations should have an additional backdraft damper installed to minimize backward cold air flow and a nonmetallic thermal break to minimize conduction of outside temperatures as part of the ductwork. The damper should be on the cold air side of the thermal break. The break should be as close as possible to where the ducting enters the heated portion of the house.

MAKE-UP AIR: Local building codes may require the use of make-up air systems when using ducted ventilation systems greater than specified CFM of air movement. The specified CFM varies from locale to locale. It is the responsibility of the owner and the installer to determine if additional requirements and/or standards apply to specific installations.

For safety reasons, ducting should vent directly outdoors (not into an attic, underneath the house, into the garage or into any enclosed space).

The unit cannot be used in conjunction with a recirculation unit.

If using a 10" (254 mm) duct, THERMADOR® recommends not exceeding 150 ft (46 m) of duct.

Keep duct runs as short and straight as possible. Elbows and transitions fittings reduce air flow efficiency. Back to back elbows and “S” turns give very poor delivery and are not recommended. A short straight length of duct at the inlet of a remote blower gives the best delivery.

Hoods are supplied with a 10" (254 mm) round transition. A locally supplied transition is required for other sizes.

Use Table 1 on page 5 to compute permissible lengths for duct runs to outdoors.