Am contemplating between Daikin Inverter and Panasonic Inverter ....which ones good and cheap eh ??Pana these days very bold on electrical saving ...this is for my bedroom unit(1HP) ..the hall one will go for 2HP normal ..as very rarely ON so doesnt make a diff inverter or not .....

My contractor told me my new house aircond piping is the normal one , hence cant go for inverter type.If really keen on inverter need to hack the wall again and redo the piping.
Such case is common ka ??I tought the inverter is using same piping system, only installation cost different with inverter type more ..can anyone confirm this ??