Truma 65mm LT Tee piece
This connector is designed to fit directly behind an air outlet, shown for reference, but sold separately. It will also accept two lengths of the 65mm Truma ducting.
So warm air is piped in from one side, some of the air will then exit the outlet whilst the remaining air will pass through to next length of ducting.
It can be used with all of the Truma air heaters that use 65mm ducting, to direct heat to a number of outlets, we also have a Y piece connector.
Truma also have their standard TS Tee piece which connects between three lengths of ducting.