Hi
@Justis - I have - on the weekend - spent a night in daughter and son-in-law's new home into which he immediately had air-conditioning installed. It has many rooms, most of the living area is upstairs, but there are also some rooms downstairs.
I had a wonderful night's sleep in a cool room, My home and especially the bedroom is somewhat warmer, but I have gotten used to it.
Their unit does not sit on the roof but in a side court, accessible, but hidden from view - the individual rooms can be individually temperature adjusted.
I have also realised that my two reverse-cycle air conditioners, which work very well (Mitsubishi!) have each cost me about $2500 to purchase plus the installation fee - and I have never cleaned them - they still work fabulously well, but will look into having them cleaned, soon.
Generally, adapting to the weather outside, opening windows at the right time and closing again, has served me well and I am mostly comfortable.
I hope you can still continue to use 'outside weather conditions' to bring the price of running your system down, because the cost will be substantial, if it's on all the time.
I am tossing up whether I should replace or upgrade my solar cell system - I have eight on the roof, but they are ten years old now - and the company has begun to pay less and less in refunds - our electricity company is based in Singapore or Malaysia - not good, it should be government-run.
The best thing would be to have one's own units on the roof and a storage battery in garage or cellar and be independent from external supply - it will happen IMO.
Go well
Taurisk
