Can this flooring be installed in a 3 season / unheated room?

Hello Anonymous and thank you for your question. Yes, the Style Selections Rigid Core Luxury Vinyl Plank can be installed in a 3-season room. However, the optimal installation temperature should be between 60° - 80° Fahrenheit, and an expansion gap should be extended from 1/4" to 1/2" all the way around the perimeter of the room. It is also recommended to install a transition (break) at the doorway leading into the rest of the home. To stay compliant with the manufacturer's warranty, we would also advise to install window treatments to protect against excessive heat and the sun's rays on the vinyl planks. Hopefully this helps, and wish you all the best with your flooring project.