Flushmount Lite - Install Video 

But you don't show how difficult screwing in the tiny 1/4" screws are on an angle.. they slide and drift, almost impossible to mount flush

so they have to be installed before you lay the floor down? or can i put these on after?

The lite doesn't have louvers to control airflow but is always open. Guess you changed the design?

what a nightmare. Almost impossible to put in the tapping screw they give you. you have to push hard and that just moves the whole thing. Angle is awkward. If you get one right you have 3 others. Hoping for better from a Canadian made product

Do not install these registers in your home as they dramatically reduce the airflow out of the register, which can damage your comfort equipment. It is advisable to consult with a professional HVAC technician to understand the impact of reduced airflow and increased static pressure on your comfort system.