On Sun, 29 Sep 2019 11:15:19 -0600, rbowman
wrote:

On 09/29/2019 05:21 AM, Davej wrote:
On Saturday, September 28, 2019 at 1:25:15 PM UTC-5, rbowman wrote:
On 09/28/2019 10:11 AM, Davej wrote:

If an HVAC system was "appropriately" sized, what maximum duty
cycle should be seen? [...]

Does it maintain the desired temperature on hot days? If it can't
it's undersized.

But what is a "reasonable" desired temperature? Is 20F less than
outdoors considered "reasonable?" So I should be able to maintain
75F indoors at 100% duty cycle if the outdoor temp is 95F?


Reasonable is whatever is acceptable to you. You can turn your house
into a refrigerator if you want to go to the expense. Personally, I
don't have AC so if it's 95 outside it's close to 95 inside.

That sounds like our bedroom. We have a 3/4 ton mini split in around
250 sq/ft that is in addition to the central air. My wife wants it 68
at night. It makes the stat.