We run our A/C maybe 3--4 hours a year. Just on the very hottest days, we turn it on for a half hour and lie on the bed while it cools us off.

It is a heat pump system, and can also be used to heat the house. That aspect gets used perhaps 1--2 hours a year.

The average daily high temperature in Ajijic ranges, coldest month to hottest month, from 76 to 86 degrees F. At night, it gets deathly cold -- frequently the temperature drops all the way down into the mid to low 60's, at which point the locals dress up in heavy coats and parkas, and put fleece coats on their dogs. Really.

tanstaafl.