For years, ZoneFirst President Dick Foster has used the light-switches-in-the-home comparison while promoting the benefits of HVAC zoning.
The comparison connected zoning to how homeowners are used to having a light switch in every room of their house to save energy. That same homeowner would never dream of having one light switch in the family room that would control the entire house. Could you imagine the electric bill? Yet they do that for their heating and cooling.