I'm finishing my basement and I want to know What kind of door do I need for around the furnace? I know I need fireproof sheetrock which I bought, but I don't know what kind of door do I need. I was told a wood door it's OK as long as it has ventilation(bifold door), Is this right? I'm confuse because wood will ignite with fire. Help... What kind of door should I use? Thank you.