I wouldn't bother with the attic vents. The temperature in the attic
you mentioned doesn't seem that high at all. The heat pump sounds like
it is working fine.

The problem you mentioned is that the bonus room heats up to quickly,
causing the heat pump to come on again sooner than you would like.

It sounds like the real problem is heat gain in the bonus room. Can
you find some ways to address that? Is there insulation below the
bonus room but above the garage ceiling? Are the walls & ceiling of
the bonus room insulated? Are there windows in the bonus room that
could benefit from blinds or window tint?

Insulation can be blown under the floor, into the walls and above the
room if you discover that it was somehow left out during
construction....

Where do you live? Does it get cold there during the winter? Do you
have problems with the heat pump running a lot to heat this room during
the winter?

I would guess you are not in the frozen north if you have a heat pump.


Steve Kulpa wrote:
Sorry, I didn't mean to mislead - the heatpump seems to be working just
fine. It comes on, air that's cooler then the room comes out of the
vent, it runs for a while (sorry, I was just guessing at the time), the
room cools down, it shuts off. Then the room warms back up again
(quicker than I'd like) and it starts all over.

The guy I talked too said since the duct work is in the attic too,
based on it's insulation R-Factor, the heat pump is working extra hard
cooling down the air from the return, which has warmed up some on it's
way to the exchanger thanks to the hot attic. By lowering the
temperature in the attic, even if it's a small amount, the return air
will cool down too, and the heat pump will be able to do it's job
easier. Plus lowering the temperature in the attic will help keep the
bonus room cooler longer after the heat pump turns off, which means it
won't come back on as quickly.

On a side note, the bonus room sits over the garage. It too was very
hot during the day, but thankfully it has 2 windows. I placed a window
fan in one window, and opened the other half way. Big difference in
the garage, which should have reduced the heat in the bonus room too,
albiet slightly, but every degree helps.

steve

Joseph Meehan wrote:
Extra note about the heat pump. Since it runs for, I believe you said
five minutes and then shuts off and you are not getting sufficient cooling
in the room(s) it services, it sounds like you have an unrelated problem
with the heat pump or the controls for it.

--
Joseph Meehan