Floor ducts are effective because they deliver heated air at floor level. The heat then rises and continues to warm the rest of the room. Floor vents are typically . 28 thg 7, 2016 - Because hot air rises, and cool air sinks, ceiling vents are the . Ceiling ducts don't hog existing or potential closet, wall, or ceiling space, . Floor Registers: Ideal for Efficient Heating Place your registers on the ceiling, however, and much of your warm air will pool in the upper part of the room where it won't do you much good. Floor registers are typically placed under windows to let the warm air they deliver mix with the cool air coming from the windows. 19 thg 11, 2007 - As for pros and cons of either: For heating, vents in the floor would be . So, with ceiling supplies the warm air tends to return to the ceiling. 30 thg 12, 2016 - Either type of register (ceiling or floor) can be used for this as long as the . Supply registers are the vents that deliver warm or cool air from your . The dynamics of heating and cooling are more complex than just a simple answer to your question. Cold air is heavier than hot air, so it would fall from a ceiling . 28 thg 7, 2010 - Ideally, we would put them in the floor since heat rises, but due to the . Anyone have experience with ceiling vents in their home in this type of climate down then after a few minutes it starts going up and warm air comes out. 29 thg 12, 2015 - Closing vents to save money in heating and cooling costs will generally . that is the cold coming through the walls, ceilings, floors, and windows. it was either way too cold or way too hot upstairs depending on the season .