It’s a 90gal aquarium with a screen top, the cool half i lined with plastic but the hot side is open screen. the room temp I’m not sure on, the house is 19c, but his tank is in my room which is small and the door stays closed so the room is noticeable warmer than the rest of the house. I will get the heat pads and the heater regulated as soon as I get back. Might try and see if I can get it to hold 90 without the lamp and more of the top covered as well