What is the homeowner's No. 1 complaint regarding his HVAC system? It's downtime. What is the No. 1 cause of downtime? Other than poor maintenance or old age of the equipment, the leading cause is power quality.
As the brownouts and blackouts in California suggest - and the major blackout in the northeast portion of the United States last year attests - the electrical grid is not highly reliable at this time. Utility reports note that power quality is at its lowest in history, and it's getting worse. The utilities thus recommend protection against power quality problems.