NEST thermostats

Gas Man · 07-15-2012, 05:17 PM

Somebody talked about unit recovery time and other aspects of your HVAC. That's the ticket.

Your A/C just doesn't have the recovery speed that heat does.

In the winter, I can drop my heat 6*-8* and recover that in mins (~45). A/C is a different animal, a 2* raise can take 2+ hours to recover (say going from 72 to 70) if the heat outside is in the 90s. The A/C units just aren't designed to cope beyond a 20* drop inside vs outside temps.

In my 30YO house that has everybit of 18-24" of insolation in the attic, a new roof, and good wall insulation) If I keep the shades drawn I can keep my inside temp about 72* even when it's 100* out. But the A/C doesn't shut off from about 1pm till probably 2-3am.

my neighbors who have the same layout can't get their house below about 80*. They don't have the insulation and updates I have.

Further, consider the different types of freon people are running. Certainly companies talk about new A/C units being more efficient but they aren't considering that the new freon isn't as cold as the older units like mine from the 90s. I forget the numbers but you get the idea...

07-15-2012, 05:17 PM	#11
Gas Man Trip's Assistant Join Date: Feb 2008 Location: Imported from Detroit Moto: 2009 HD Street Classic Posts: 12,149	Somebody talked about unit recovery time and other aspects of your HVAC. That's the ticket. Your A/C just doesn't have the recovery speed that heat does. In the winter, I can drop my heat 6-8 and recover that in mins (~45). A/C is a different animal, a 2* raise can take 2+ hours to recover (say going from 72 to 70) if the heat outside is in the 90s. The A/C units just aren't designed to cope beyond a 20* drop inside vs outside temps. In my 30YO house that has everybit of 18-24" of insolation in the attic, a new roof, and good wall insulation) If I keep the shades drawn I can keep my inside temp about 72* even when it's 100* out. But the A/C doesn't shut off from about 1pm till probably 2-3am. my neighbors who have the same layout can't get their house below about 80*. They don't have the insulation and updates I have. Further, consider the different types of freon people are running. Certainly companies talk about new A/C units being more efficient but they aren't considering that the new freon isn't as cold as the older units like mine from the 90s. I forget the numbers but you get the idea... __________________ -Chris "Why pay somebody else to fuck up your bike?" Run Amsoil Product