Hi there, I recommend Hong Tar too. Mine was a special installation as i wanted the compressor to be placed outside instead of the service balcony. Went to ask ard & many coys don't know/want to do it(special bracket, HDB approval needed etc). Luckily found Hong Tar & i guess this separate the pros with the amateurs. Dislike; 1) They are not the cheapest 2) Dismantling of old aircon & trunking could be more delicate.