Comment Re:A/C not present in households? (Score 1) 281
You optimize for what you need most of the year. Here we definitely need central heating from roughly October until April. Then there are a few months in between where outside temperatures are low enough to be comfortable inside without AC (let's say 20 to 25C). If there are a few warmer days up to 30C you fence off the heat during the day by closing curtains and keeping windows closed to keep sun and warm air out. A well insulated building will keep it comfortable for long enough. During the night you open windows to cool down. It's usually not worth installing AC for those 2 or 3 days a year when it's really warm. There are summers where we barely hit 30C.
I heard houses in Texas don't have central heating. Same principle.
All that might change if global warming gets worse. but still I'd prioritize passive cooling by installing e.g. outside sun screens.