so mine inverter with 8550BTU is just nice hor? the salesman said my room requires 11000-12000BTU i told him doesnt matter, even if it takes that extra 5mins to fully cool down my room i said i got budget means i got budget.... canot afford means canot afford now i've been using it every night w/o fail for like 9hrs and weekends on it even during day time.... i wonder how much the bill would be....