Dear atrecord,Very appreciated for your comments. It seems that the noise is a hurdle for me. becoz we are very used to quiet aircon. i can accept other cons as i dun think we will use air con very often. for current split, we only use total of 2 to 3 months per year.think the feedback for portable is discouraging, i might consider window unit. really need to consider all the pro and cons for both options.....thanks again :thankyou: