If you're talking about the "holes" in the heatilator, of course
it would be bad to plug them! I'd suspect it'd be bad to plug
ANY hole unless you're positive what you're doing. Your descrip
is very lacking in the place where high detail is needed; sorry.
A heatilator works by extracting the heat from the air before
it goes to the chimney, but ... it can't make the air cool
naturally.
Is it functioning OK? I'd leave it alone if I were you except
to possibly oil any oil ports if the motor has them and be sure
the cord is in good condition.

Perhaps if you more closely described where the "holes" are, what
they're in, and what are they between, etc.?

Oh, BTW, heatilators also, by their nature, make the air going
up the chimney cooler than usual and so creosote and such builds
up much faster. Using a "roaring fire" to clean a chimney,
especially when one is using a heatilator, is a dangerous
situation. Only clean it the right way. \

HTH,


"Rex B" wrote in message
...
: While doing some crack-filling where the brick meets the metal,
I
: inspected the interior of the cavity where hot air circulates
around the
: firebox and is then blown out into the room through the vents.
At the
: upper rear of this cavity, on both sides, there is a vent hole
about
: 4"-6" in diameter. They are apparently open to the interior of
the
: chimney, between the stovepipe and the brick. Looks like most
of the
: hot air is going to waste. I expect the upper end of the the
brick
: chimney is nice and toasty.
: Is this normal?
: Would it be dangerous to close these off?
:
: --
: - -
: Rex Burkheimer
: Fort Worth TX