New buildings built over the last couple of decades generally have provisions for keeping the outer unit of the air conditioners out of the way. We largely use

New buildings built over the last couple of decades generally have provisions for keeping the outer unit of the air conditioners out of the way. We largely use ceiling fans in Singapore. The difference in electricity bill between the couple of months with horrific heat where we use a lot of air conditioning and the rest of the months where we don't is pretty steep. A few people may want to use air conditioning all the time - so it's fair to give others a choice. Heating on the other hand in cold countries is pretty non negotiable from what I've experienced - so centralized may work better.