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Ran the ac today to test conditions (in part because DH left and refuse to return home until the ac was on). No sweat anywhere, even on supply lines that I had not yet covered with R-13.

Outside...

cem-bsee

What does running the fan on auto do?

Fundamental problem with vented crawl space in the Southeast: hot, humid outside air hits super-cold AC supply lines, creating a rain storm.

The answer is to seal crawl and insulate pipes. I'm...

What can I do to prevent sweat on ducts? HVAC guy refuses to help. Supply lines are located in the crawl space.

Main trunk is metal and wrapped; branches are flex in R-6. Last summer everything...

No, we've haven't had short cycling with AC, (although this was a real problem this winter with heat. I think my post was something like "my heatpump has gremlins." HVAC guy bit by bit replaced...

John, to clarify:

We have a close to properly sized heatpump (Trane XL 16i), just installed last year. (Based on the load calc I did with HVAC-calc, we needed closer to a 2.5 than a 3; HVAC...

HVAC Pro and simpleman,

I think the HVAC contractor is responsible because
1) He knew the installation was going into a vented crawlspace. He lives and works here. He knows what the environmental...

On a heatpump, what level of relative humidity should there be in the air at the point of the unit and at the point existing registers? If the unit is operating properly, what range should the...

I read this thread with interest. We live in hot and humid Virginia.

We are in the process of renovating/adding onto a 1940's house with a vented crawl space. We took many months to remove old...

Hi. I want to search the forum for a topic, but can't find a way to do that. Probably missing something obvious. Pleae help. Thanks.

What is the "balance point"?

We have the Trane XT500C, which seems to look like the one on your second link, but the description of it resembles the one on your third link.

And while comfort is part of the equation, money is...

Mark, we actually like cooler temperatures, and have a hard time sleeping if it is much above 60 degrees in the house. In theory anyway, our thermostat has a program in it that slowly raises...

We have a brand new heat pump system, Trane XL16i heatpump with Trane variable speed airhandler (4TEE3F40A1000AB--the guys who work on it refer to it as "the 40"), Aprilaire humidifier and...