Thinking about buying a Catt with some doubts

[rbarata]

Do you mean your room is 20C to 23C without heat during winter days and 18C at night? That is fine for Catts if light is good.

20 to 23ºC due to sun exposure and closed door. 18ºC at night 'cause it's were I work at night with A/C. When I leave the room to sleep, turn off the A/C but always leave the door closed, so the temp falls slowly until 10ºC, maybe less. In the morning, I always open the window so the sun can get in.

At least my phals like it this way.