<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div>Dear users,</div><div> </div><div>I want to model a building with type 56. I divided the building into several thermal zones but two of them which are adjacent zones aren't separated by a wall (there is only air between them). Please, give me your opinion, How can the two zones be separated?</div></div></body></html>