Only 200'ish hours in and I think I've got to replace my air filter. Ceiling mounted in a fairly standard environment (not hot at all) and an extractor fan about 2-3 ft from PJ, yet tonight it powered off 3 times after about 10 mins of use. I took the air filter out and it's pretty clogged up. I know it depends on envirnment but 200 hours seems awfully low for an airfilter. Anyone else had to replace yet and also where can I get new ones from, I assume they are not re-usable in anyway. I hope that was the problem, I haven't put it back on yet..