They all use ceiling vents.
Floor vs ceiling vents.
Floor wall and ceiling registers each have their own strengths and weaknesses that make them suited for different situations.
Ceiling ducts are more visible than floor ducts and harder to camouflage.
Typically a rolling guide or a lever on one side of the vent the damper opens or closes access to the air duct for airflow management.
Floor ducts for heating.
The ideal register placement for each room depends on a variety of factors including energy efficiency ease and cost of installation appearance and of course comfort.
This isnt the main concern however.
As for pros and cons of either.
The placement of your return is.
If theyre in the floor youll want your return in the ceiling.
According to the natural laws of convection heated air entering through floor ducts rises.
As a general rule ceiling mounted vents offer better cooling potential while floor vents offer superior heat delivery.
My furnace guy tells me that here in oklahoma floor vents are no longer allowed in new homes.
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.
For heating vents in the floor would be better.
Ceiling ducts cannot be used with radiant heating systems which generate heat from the floors.
Heat entering through ceiling ducts however naturally tends to accumulate at the ceiling warming the room from top to bottom more slowly than floor ducts.
Air registers have slatted openings in the floor wall or ceiling that a user can control using an adjustable damper.
How air registers work.
They can be camouflaged with decorative vent covers that match carpeting tile or hardwood flooring.
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.
Ceiling ducts don t hog existing or potential closet wall or ceiling space making an interesting or worse unsightly decoration and ceiling vents don t present the decorative dilemma floor vents often due forcing furniture to strange locations to prevent blockages in airflow.
Floor heat ducts are not as visible as ceiling ducts.
For cooling ceiling would be better.
This disperses warmth evenly throughout the room from floor to ceiling.
For homes where heating is a primary concern floor collection is advisable to pull from.
Is there even a difference between hvac supply registers grilles in the floor or the ceiling.
Taking into consideration the cubic feet per minute of air needed for the room to maintain a comfortable temperature and the throw or coverage of the area.
These principles should also be applied when locating return vents the vents that pull air from the room to supply your hvac system.