A furnace is basically a recirculating air pump.
Cold air return vent covers up or down.
In the summer you want the cold air to remain and the hot air to be drawn out through the return registers.
A return draws air into a return duct system with negative pressure compared to the space usually via a fixed grille but also often called a return vent or a return intake vent or for some of you old school folks from up north the cold air return.
It draws cool air from all the rooms in your house that have a return vent and pumps hot air into these rooms through the heating vents.
Since cold air is heavy it will automatically flow down to the lower register.
This continued strain on the hvac system can lead to a decrease in performance and more hvac repairs down the road.
Instead it sucks up the air and returns it down the ducts to the air vents to be blown out again.
That is the same with supply vents as well if you have adequate air flow and few cold or hot spots in the room from inadequate air flow or distribution.
Some systems have two sets of return vents one up high for warm air and one low to the floor for cool air.
The low vents stay closed in the summer and the high vents stay closed in the winter.
A popular misconception about vents is that by shutting some you can improve the efficiency of others.
Adjust return registers for summer.
If you cover the return vent in a particular room that room won t get as warm as the others.
There are several factors to consider.
You can find floor registers in a variety of materials styles and finishes so you can incorporate them as a decorative element that also blends.
This will then remove heat from as much as the room as possible and thi.
I hope all these people who say they don t know what that is have been opening that up and replacing the air filter in it around once a month or so.
By opening the lower registers and closing the top ones you keep hot air in and draw the cold air out.
It is not the air vents that blow out the air.
The return air flow is one location in the house.
The supply vents registers or diffusers blow air into the.
As cold air wants to go down it s heavier than warm air pointing it up will throw it further thus getting more cold work done.
Registers these typically slatted covers are found in the floor wall or ceiling and their defining feature is a lever that allows you to open or close the air vent to adjust airflow into the space.