My AC guy said that a right sized system in Texas will never be able to pull the temperature down more than about 25 degrees Fahrenheit. This is the limit I’m trying to get around and I know it’s possible because systems in hotter places can do (like in Arizona) and commercial systems in shopping malls and stadiums can do it too.
Just guessing here but “right sized” might be relative to historic temperatures and don’t take into account the extremes?
In Arizona 117 is common enough that you’d expect the AC to handle it with no problem but Texas it probably isn’t that common (guessing). Think the hottest it got since I’ve lived there was 122. People also commonly don’t cool their houses too low because it gets expensive, my sister used to have a McMansion and their AC bill was a lot (something like $400/month) and they were only cooling to around 78 or so.
Your guess is exactly right. There are a couple of standards that are used to calculate the correct size of unit and it shoots for something that will work most of the time. Now that weather is getting more extreme I question if those manuals are still correct.
That’s exactly what I’m trying to figure out. The guy basically told me that they won’t install an incorrectly sized AC and I’m trying to figure out why. The best that I can determine is that they are worried about humidity issues but I don’t see why a smart thermostat and variable speed system couldn’t work around that.
Commercial spaces have giant units that cool much more than I want. What are they doing differently?
