So I'm pretty hands on when it comes to reading up and learning for my new build, but I'm stumped on the whole phase 1 power versus phase 3 etc. The builder comes default phase 1, and I'm confused if and whether I need phase 3(or 2??) ppower for a new home build? I mean it'll be a rental property, thinking ducted reverse cycle air conditioning up front (even if just ducted air cond or split systems does this make a difference)? Can anyone shed some light? Or is phase 2/phase 3 power something rare/needed for pools, which I don't plan to have in an IP? Posed the question to ambience airconditioning in response to their quote and all I got told was needed by them at the time of my build was if I could do a 1200 x 600 concrete slab pour for the air cond unit. Otherwise no specific power or plumbing needs? A quick google seems to indicate phase 3 power being required for air conditioning, so now I'm confused? Can anyone shed some light please?