DerbyDad03 wrote:

On 8 Aug, 16:45, wrote:


I just had a new HVAC system installed in a new house and have not paid for
it yet. Today the temperature is 100 outside. I have my thermostat set to
77 and the actual temperature is 81. (This is upstairs, downstairs a
separate system is maintaining the selected temperature.)

I am getting about a 20 degree drop. Is that acceptable or should the
system be doing better?

Thanks for any help!



How long has it been running? What was the temp when you begin to
cool it down?

It could take many, many, many hours to drop a 100 degree space, with
all it's 100 degree furnishings, the full 23 degrees.


In addition, if everything in the home is loaded with the latent heat of
humidity it will take many times longer to pull the sensible temp
reading down.
Also, the upstairs area usually has a greater heat-gain than the lower
floor area.

http://www.udarrell.com/latent_heat_condensation.html

What SEER Rating at 82-F ambient is the new unit?

Higher ambient (outdoor Temps) can considerably lower the capacity of an
82-F outdoor temp Rated Ultra High SEER Rated unit.
In very hot & especially humid climate zones, I would go primarily by
the higher outdoor 95-F "EER Ratings & BTUH performance at those very
high application load conditions." I also hope your new unit has a
Scroll compressor & a TXV metering device ahead of the E-Coil.
- udarrell

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