Most of us will have a four-day workweek with Labor Day closing many workplaces Monday.

But there has been a lot of discussion whether the high price of gasoline will prod more employers to make a four-day workweek the norm.

The human resources profession calls it the “condensed workweek,” in which an employee works four 10-hour days. Many municipal and state governments have adopted the four-day week. (New Jersey and Pennsylvania don’t plan to do it.)

Many offices offer flexible work schedules. Coatesville’s Aerzen USA Corp. is one of the few manufacturers I’ve come across that does so for many of its 51 workers.

Aerzen makes industrial machinery, including positive displacement blowers, compressors, and vacuum pumps. The firm says nine of its production workers have opted to put in 10-hour days Monday through Thursday and take Friday off.

It works because the production department operates as a team and the number of people working each day is consistent from week to week, said Aerzen HR director Jean McAllister.

In the office, 12 employees have opted for the program. Because their duties are more individualized, office personnel need to “stagger their off-days,” she said, with Mondays, Wednesdays and Fridays tending to be the days they choose.

Those in sales and customer support don’t participate in the program, and some employees cannot because family or other commitments prevent them from working a 10-hour day.

Aerzen’s not doing this just to save workers gas money. The firm says flexible schedules improve the work- life balance of its workforce. And it also fits into a corporate mission to be “greener.”

I’d be surprised if shorter workweeks make a dent in the 24/7 workaholic American business world. If they do, it’s hard to believe that the U.S. economy could remain as productive as it has been.

But the outplacement firm Challenger, Gray & Christmas Inc. said 23 percent of the 100 employers it surveyed in May are now offering them.

We’ll see if four-day workweeks have more staying power than casual Fridays.