Should i be worried?

Ok, heres the dilemma. I have a 3x3 corner or a room sectioned off for flowering with a 400w hps. I also have a 4x4 tent on the opposite side of the room. With a 400w mh. I live in a mobile home. I need to know if im susceptible to flir. The reason i ask is because a copter was flying rather close to my house (3:36a.m.). Flew back by around 4:50a.m., its 23 degrees outside. My two rooms are 78 an 81.

If venting outside use a filter under your mobile home is best if you can.
if not know one would care your got a warmer room , maybe your use a electric heater in your bedroom they dont know.