Hi everyone.. Air-con newbie here.. Am planning to get an air-con together with my flat reno starting in 2 weeks time... Have been shopping around and decided on the Toshiba brand. My original intention was to just air-con the master(4m x 2.9m x 2.5m) and common bedroom(3.9m x 2.9m x 2.5m). I got a quote for a System 2 (2x9000 btu) at $2500 + installation + metal bracket. Lately, i decided to aircon my living room(6.3m x 2.95m x 2.5m) as well. However, when i check the quote again... it jumped by over $1k. System 3 (2x9000 btu + 1x12000 btu) is $3550 and if use 18000btu instead of 12000btu, quote is $3650. I was expecting an increase of between $500-$600 at most so i like to ask all here.. is this increase of near $1k reasonable and what else could have changed beside just adding an additional blower unit? Thanks in advance for any reply or advice! If anyone here has an alternative quote, i will be interested to hear it too...