The best way to mount (attach) our unit in the recommended location is by using the double-sided sticky foam tape. This eliminates the risk of damaging anything by using screws or other fasteners into the evaporator air box.
We provide recommended mounting locations in our installation manuals based on the A/C unit design.
Mounting Location Note: Our unit can tolerate heat but only in noted locations. NEVER mount the unit in the hot air exhaust from the condenser fan.