Folding Doors bring the outside in and open up the room to the outside living area.
Found it at Wayfair - Sunroom 2 Ft. W x Ft. D Polycarbonate Greenhouse
Screen Porch Construction - Step by Step: The Family Handyman More (deck step framing)
30 Sunroom Design Ideas, love the dark floor and French doors
Amantii Electric Fireplace Indoor or Outdoor Built-in