Heat cost vs wind chill
James
wind is not on you but on the house, does it take more heat to keep
warm?
Rod Speed
> Does wind chill mean any thing when it comes to heat bill?
Nope, its primarily an effect with human bodys, and unless your house
is very badly maintained indeed, there shouldnt be any real wind inside it.
Wind does however make a big difference to the leakage
with a badly sealed house. Thats not wind chill tho.
> Since the wind is not on you but on the house, does it take more heat to keep warm?
Only in the sense that if the house isnt sealed properly, more of the hot air leaks out when its windy.
Thats not wind chill tho, thats just leakage.
Vic Smith
Wind chill is a term reserved mostly for TV weathermen and those
whose interests are the study of cold weather survival and injuries.
It applies to human skin.
So as soon as you use the term for anything else the pedants will jump
on you.
But if you just call it heat transfer, the answer is yes.
Wind will cool your house faster than no wind in the winter.
And a hot wind will warm your house faster than no wind.
Air/fluid movement across the thermal interface increases heat
transfer. On a house that's windows, bricks, doors, etc.
Internal heat is always flowing toward outer cold to escape
A common and easily seen example of this is parking your car outside
at 0F with the radiator facing into the wind versus putting it in the
0F garage.
There is a big difference in how fast the car cools off.
You can look up heat transfer and thermal barriers if you're really
interested.
But when the wind blows, it blows.
--Vic
George
Yes, same effect. Wind chill simply refers to the concept that as wind
increases the boundary layer on a heated object is diminished and heat
is removed faster because that layer acts as extra insulation.
P T
>Does wind chill mean any thing when
>it comes to heat bill? Since the wind
>is not on you but on the house, does
>it take more heat to keep warm?
Your furnace produces heat.
Since your home does not get hotter and hotter, the heat the furnace
produces must be lost to the surrounding environment.
If the heat is lost faster rather than slower, the furnace must produce
heat faster, which must result in a higher bill.
Does a wind cause the house to lose heat faster? Does blowing on hot
soup or coffee cool it down faster?
QED
JR Weiss
> Does wind chill mean any thing when it comes to heat bill? Since the
> wind is not on you but on the house, does it take more heat to keep
> warm?
Wind will increase convection losses wherever they happen to be. Any small air
leaks around windows, doors, etc will be exacerbated by wind. Losses through
single-pane windows will increase as the heat is removed from the outside
surface faster.
Strict radiation losses will not be affected.