Sep. 26, 2018
This one’s easy for us to answer: Keep your AC vents open—always.
(Yes, even the vents in rooms that aren’t used.)
You might think you’re saving money by closing vents in unused rooms, but what you’re really doing is costing yourself more money.
In fact, closing AC vents just results in:
- Higher energy bills
- Frequent AC repairs
Why you should keep your vents open
To prevent high energy billsWhen you close AC vents, you increase the pressure inside your home’s ductwork. As pressure inside the ducts increase, more cool air (that you’ve paid for) gets pushed out of duct leaks.
You see, the typical home already loses about 30% of conditioned air to leaky ductwork. And that statistic (from EnergyStar) assumes you’re keeping all of your vents open. That percentage increases with every vent you close.
The bottom line? The more vents you close, the more money you’ll spend every month on cooling/energy bills.
Depending on what kind of AC blower motor you have, closing AC vents can lead to several, frequent repairs, such as:
To prevent frequent repairs
- A bad blower motor
But when you close your AC vents (and increase ductwork pressure), you’re forcing these blower motors to ramp up to higher speeds for extended periods of time. This results in frequent blower motor repairs and eventually complete blower motor replacement.
- A frozen evaporator coil
So, when they encounter extra pressure (via closing vents), they simply don’t blow as much warm, unconditioned air over your evaporator coil (the piece that cools the air). When the evaporator coil doesn’t get hit with enough airflow, it will quickly freeze over.
And the worst part? A frozen evaporator coil will eventually send super cold refrigerant to the outdoor unit, which will destroy the compressor (a $1,500 replacement).
Want to avoid expensive AC repairs? Or have you been closing your AC vents and want an AC repair or check-up?
Have more AC questions? Ask your NJ tech
We can help, either way. Just contact us.