June 12, 2018 at 8:41 am #2169 Victoria BubyParticipant I replaced an older 5,000 BTU Air Conditioning Unit with a Haier 10,000 BTU 11.2 CEER Electronic Control Air Conditioner, which I’ve had for a year now. The installation of this particular model was quite simple. I placed the unit into the master bedroom which is closer to 400 SQ ft. It does take a short time to start blowing cool air when first turned on but once that cool air starts coming, it maintains quite nicely! It is a bit louder than I had hoped for but I had purchased this unit for the cool air and cool air, it produces. I am pleased with my purchase.