wrote in message
oups.com...

wrote:
Don't be so quick to keep warm air away from windows. There are
reasons houses are designed with heat sources under windows.

1. It prevents condensation and the accompanying mold, mildew and
water damage.

2. It prevents a "drafty" feeling when you're next to windows by
ensuring the windows are warmer and thus giving off almost as much
radiant energy as interior walls.

Yes, it wastes some energy, but if you're that set on saving energy,
look to newer windows.... although I won't guarantee you'll save money
in the effort.

Where do you get your information? Heat sources, as you call them,
are NOT installed under windows for the reasons you mention.
Radiators, either electric or hot water, are installed on OUTSIDE walls
because of convection.......Cooler walls cause the warmer air to rise,
which in turn, cause warm air to circulate.

Actually, it's neither. It is called perimeter heating. You are simply
replacing the heat energy that is lost. If you had perfect insulation you
would have no heat loss. you would need an A/C to cool you and your
appliances. You can probably Google its progress through the 20th century.
It was accepted around the turn of the century, (NOTE*bad memory=possible
bull****check facts) then from somewhere around 1910-1920ish until the
1950's the opposite was believed to be true and hot air heating was all the
rage. This is why the old gravity furnaces had the supply registers along
the interior walls.

Then, we're back to perimeter heating.

Now, a few years later, incorporate cooling. Higher air velocities,
fighting stratification zones.... so yes, now we have "air circulating". And
to the other poster "windows are as warm as interior walls".... yes you've
overcome the heat loss and are now feeling the additional heat. So you're
both kinda right! 8-)


-zero