The ideal location would be close to the floor, but the house structure limits location. It is common to see air return grilles on walls or ceilings.
Cold air return vents are the ones on the wall
You actually "need" only one cold air return for a forced hot air/AC system to function; however, one cold air return per level or floor improves the efficiency of the sytem.
Heat naturally moves to colder air. Place the heater on the floor and it will rise to the ceiling, as it is lighter than the cold air.
You will hear air circulating in the cold air return (or return air grille) when the heater or air conditioner is running.
Yes
Nearest to the thermostat.
In a cold place.
Ceiling. Cold air fails
Cold water currents are currents which flow deep along the ocean floor. Cold water currents can cause temperature changes which in return can have a major impact on the overall climate of the Earth.
The floor is cold?
Cold water currents are currents which flow deep along the ocean floor. Cold water currents can cause temperature changes which in return can have a major impact on the overall climate of the Earth.
Open, that`s where the cold air is.