Relevance? It’s expensive.
I know millionaire self funded retirees who think they can't afford to turn on the aircon in their home or car.
It's a stuipid situation, they spend $2000 to $5000 on a split aircon or ducted system that sits there idly doing nothing most days.
But really , not true if your run the aircon the correct way .
Most people make the following mistakes
* they think the salespeople who sell aircon units actually know what they are talking about = not true. Most these are know nothing sales assistants who likely never made it past year 10
* they think aircon techs who also sell aircon units know what they are talking about = really not true , most are glorified plumbers with at best a trade cert from the local tafe
* they buy under sized units based on the advise given by the above and wonder why it has to work HARD to cool the room/s or house , reason , it's incapable of extracting the heat stored in the warm humid air, the walls ,the floors, the ceilings , the furnature , result rather than just needing to idle the compressor fan it's funning flat out when ever the unit is on , hence more electricity consumed
* rather than letting aircon run 24/7 , people only run it for short periods each day , see above
* they set the thermostat too low ( 21 degC , when 26 degC is nice ) , see above
* they set the fan speed to the highest setting , rather than automatic speed , see above
* they forget to regularly clean the filters , aircon has to work harder to pull air through a dirty filter .