I have a house built in 2019 by Lennar.
It has a typical gas furnace and Lennox AC system.
I notice some cold fresh air blowing in the return air vent in the ceiling when the system is not running.
At first I was thinking it was a duct work leak. However everything seems tight and no tears.
Now I am reading that some new houses have make up air added to the system because they are so tight, it keeps stale air out.
I noticed that the ducts always seem pressurized, when I change the filter media, I can feel air moving through the system, with the system off.
Is it common for residential systems to have make up air? What would I look for to see if I have this?
I wanted to ask on here before I opened a ticket for the warranty company.
It has a typical gas furnace and Lennox AC system.
I notice some cold fresh air blowing in the return air vent in the ceiling when the system is not running.
At first I was thinking it was a duct work leak. However everything seems tight and no tears.
Now I am reading that some new houses have make up air added to the system because they are so tight, it keeps stale air out.
I noticed that the ducts always seem pressurized, when I change the filter media, I can feel air moving through the system, with the system off.
Is it common for residential systems to have make up air? What would I look for to see if I have this?
I wanted to ask on here before I opened a ticket for the warranty company.