Nevermind about them readings now. I pulled my A-Coil and cleaned it.
The difference?

Before the cleaning, the system dropped the house temp at a maximum
..4°F an hour.
Afterward, it dropped at 1.65°F an hour minimum. In the room that
counts the most (my room) it was able to do 2.1°F an hour!

I used a fine wired brush to get the crap off the bottom of the coil.
I used my air compressor to blow out the fragments. And I finished up
with Frost King Coil Cleaner, from Lowes. So yes, fiberglass filters
friggin suck. I'd rather use a higher Merv filter and save the time
and headache from pulling that A-Coil out and cleaning it every 6
years.
The filter I am switching to is Merv 7, washable filter. That way I'll
just clean it every month, and save the money and waste.

A large thanks to everyone whom made suggestions and took part in my
thread.

Lin0 wrote:
I'll get them readings tommorow, it rained and was cloudy all day here.
Lin0 wrote:
dpb,

I bet I would also BUT I want a floor up there sitting ontop the
rafters. So what I will do is look for a high R value insulation that
is the thickness of the rafters up there. If anyone has any
suggestions, I'td be much appreciated.

I measured all the INSIDE walls on the outside of all the rooms with a
laser temp gun/no contact gun. I also shot the roof and on the
northwest roof it was 85 - 90° and shaded by a tree
on the southeast roof it was 120°F throughout

I'll take some readings of the inner and outer temps tommorow around
1pm, thanks for the great suggestion!


Lin0 wrote:
Cool take a look at these temps and see if the current insulation is
doing its job

Right now 1:31pm Flat Rock michigan = 84°F
My A/C is not on, and there are no fans bringing in outside air
79°F on main floor
104°F in attic

I'll bet you would see a noticeable change if you were to add more
attic ventilation

All outside walls ranging between 76° and 81°F

How did you measure that? Surface temperature measurement is difficult
and not necessarily very accurate owing to whatever the surface
actually is.

But, what's more important is the difference between the inner and
outer temperatures which is nearly nothing at that point in time --
that indicates more likely that it simply hasn't warmed up that much
yet but _could_ also be saying there essentially isn't any thermal
barrier-- impossible to tell the difference from only one data point
even assuming the values are correct.

The only thing that makes think you would likely have at least some is
that you're in a northern cold-weather climate where I would _presume_
they routinely did insulate. But, not knowing anything about the
particular house, that's still simply supposition--a lot of tract
houses were built around that time in a real hurry and energy saving at
the time was _way_ down on the list of priorities.