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Bobbie,<br>
<br>
No sleep for me tonight, I see.<br>
<br>
I disagree <strong>loudly and strongly</strong> with his statement
that cellulose will be an allergy problem!!!<br>
<br>
You are absolutely right, fiberglass is far worse and more likely to
get down to the living space because the particles that become
airborne are a smaller, lighter fiber than cellulose.<br>
<br>
Cellulose will settle and form a 'crust', locking in the fibers.
Fiberglass does not.<br>
<br>
You need to deal with several potential leaks that could connect the
living space and the house. The ducts, of course, but if the fan,
housing and other parts are also up there, all cabinet joints, the
filter access (even if the access door for servicing filters is
tight, I'd still tape the edges between services (it's the only
appropriate place for standard 'duct tape'; it will hold the month
between servicing and it's cheap).<br>
<br>
Of course, all of the grill boot penetrations <em>must</em> be
sealed to the ceiling, as should any bath exhaust fan that is ducted
through the attic.<br>
<br>
Then, all of the other penetrations mentioned in my first post...<br>
<br>
If you have to work in the attic in those temperatures, limit to
about 15 min stints; hydrate religiously and get out if you start to
feel better - that's an early sign that the heat is getting to you.
Early morning is typically coolest, after a full night's chance to
cool as much as it can.<br>
<br>
Haven't mentioned, or seen mention of, ventilation of the attic. If
it's not, that might help. At least it might let you open the
access and intentionally lose a bit of living h space chill up
there, to extend your safe working time.<br>
<br>
G'night.<br>
Bob Klahn<br>
<br>
Good luck.<br>
Bob Klahn<br>
<br>
<br>
On 6/1/2011 10:12 PM, Bobbi Chukran wrote:
<blockquote
cite="mid:C48E7380-17AA-4DFE-B874-45F6C095E400@bobbichukran.com"
type="cite">The HVAC guy said he could do blown in fiberglass of
some sort (no formaldehyde, he claims) on the attic floor before
they install the ductwork. When I mentioned cellulose, he didn't
seem to like that idea. He seemed to think that with my
allergies, it might be an issue. I'd certainly rather breathe
cellulose than fiberglass. Of course, if the ducts are sealed as
well as they should be, there shouldn't be ANY leakage into the
house. Working up there in loose fiberglass would not be pleasant
should we need to do that.
<br>
<br>
Problem is, it doesn't cool down at night here, or doesn't
consistently. It's 9 pm now, and it's still over 90-degrees. We
are frugal with the AC, but do need it.
<br>
<br>
I understand about the proper sizing. Our former house was never
comfortable because of that. We're going to ask the guy if this
unit he's recommended can be downsized a bit since we will be
adding so much insulation.
<br>
<br>
bobbi c.
<br>
<br>
<br>
</blockquote>
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