- Fireplace Xtrordinair Built-In Direct Vent Fireplace Installation Manual

Installation (for qualified installers only) 25

Diffuser Plate Adjustment

Certain vent configurations require the diffuser plate to be adjusted (refer to the approved vent

configuration charts for details). Position # 1 is stock (bent). Position # 2 is flattened. See the

directions below to change the diffuser to position #2.

Back Wall of Firebox

Firebox Roof

Remove the exhaust

restrictor.

1/4" Nutdriver

Remove the diffuser.

1/4" Nutdriver

Secure the flattened

diffuser plate with the

screws removed earlier.

Replace the exhaust

restrictor (see “Exhaust

Restrictor Adjustment”

for restrictor settings).

Bend the round portion of the

diffuser so it is flat (position # 2).

Before (Stock - Position # 1)

After (Position # 2)

DIFFUSER SIDE VIEW