Many people make an understandable mistake with their heating, ventilation and air conditioning.

They close the vents, especially in unoccupied rooms, on the theory that they will save money.

But they’re wrong.

Instead, energy costs rise when HVAC vents are closed.

That’s because the closed vents prevent heated or cooled air from flowing into the unoccupied rooms. The result: The excess cooled or heated backs up in the ducts and finds its way out of the house via leaks in the ductwork. Even the best ducts spring leaks and get dislodged over time, especially in New York City, where rodents infiltrate ductwork and vibrations shake it.

The extra air in the ducts also causes the motor to work harder, which can shorten its life.

Do you have questions about vents? We can help. Premier HVAC is a locally owned company serving Brooklyn, Manhattan, Queens and Long Island. (718) 395-2623