Hi all, I am new to all this aircon stuff, so I have some general questions, hope you guys can answer some of my questions. My current aircon is Sanyo, non-inverter, a system-2 and a system-3, the latter is broken, repairing is not an option. The aircon uses R22. I live in a condo about 10 years old. My questions: - The piping in my house is concealed, so I assume that it will normally not be replaced when installing new aircon, is that correct? - Will I be able to switch to R410A aircon, or will that not be possible without changing the internal piping? - My system-3 is the one that needs replacement. It has 2 separate compressors in the box, one for the 2 common rooms and one for the MBR. I imagine that this is more efficient when using only one of the rooms. Do all modern non-inverter types have separate compressors or does it depend on the model? - Since I am hardly using the aircon at all, i am considering buying non-inverter. With regards to life-time, is there a difference between inverter vs non-inverter? - What is the target temperature that they normally use to determine the capacity? 18C, 20C, 22C? I usually have it at 25C, does that mean I can do with a lot less capacity than would normally be advised for a space of that size? Thanks in advance for your help!