Comments on: Why is it that its longer to warm up when my portable heater is elevated versus it being on the floor?

By: weaponspervert

weaponspervert — Sun, 17 Jan 2010 06:11:16 +0000

Well, I’m not sure I am right, but… Hot air tends to rise up, even in a room. If you will open a window on a cold day, you will feel the cold air at your feet first and more intense. So hot air goes up, cold air stays down.
If your heater is down on the floor, where the cooler air tends to accumulate, then the heater will be in more direct contact with it and the energy transfer will take place faster. In other words, the cool air will get heated while the hotter air above just stays there (disregarding other flow of air in your room). More energy is being released in your room this way and it heats up faster.
If the heater is somewhere up, it has nothing to heat but the already hot air, so the energy has to go from the heater to the hot air and then to the cool one lower, which takes more time, because of the smaller differences of temperature on the way.
Another idea might be that the heater also heats the floor, which heats the cool air.

By: ozzy59

ozzy59 — Fri, 15 Jan 2010 05:02:08 +0000

Heat rises.So if you put the heater on the floor it will warm the room from the floor up. When it’s elevated the top of the room gets warm but the cold air on the floor does not.

By: kat

kat — Wed, 13 Jan 2010 16:25:30 +0000

cause the warm air goes up if its on the floor its gonna heat the whole thing if its higher it will heat only half the room…which mean the top of the room…live it on the floor its better…

By: petey00petey

petey00petey — Mon, 11 Jan 2010 22:35:45 +0000

My guess is that because heat rises when the source is at floor level it will heat the entire room from that level but when it is higher it is,in effect, only heating the room from the middle to thew ceiling leaving the lower half with no heat

By: cree110

cree110 — Sun, 10 Jan 2010 13:28:47 +0000

Because heat rises. So if it’s already half way to the ceiling, you’re not getting to enjoy the full amount of heat because its escaping.