Drolet Heat Commander Installation And Operating Instructions Manual page 28

5.4.2 Installing the start-off adapters
After choosing your output configuration, do the following to install the start-off adapters.
Warning: Use gloves to complete the following steps because the start-off adapters
and caps can be sharp.
1- Position the start-off adapters in the
selected distribution hole.
2- Fold each tab of the adapter from the
inside of the plenum to immobilize the
adapter on the plenum.
3- Repeat 2 steps above to install other
adapters.