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Another dirty little way the Nest achieves energy savings is that it is programmed to show a temperature reading that is up to 4 degrees warmer than it really is in heat mode, and several degrees...

Transfer, remove, nit pick.LOL.

In order to refrigerate something, you have to remove BTU'S. Heating is adding BTU'S.

My understanding of the Nest is that it is not just a programmable t-stat, it achieves it's energy savings by keeping the system Off as long as it can. This is why the homeowner has noticed a decline...

From what I just read on the internet, the free energy audits is only for commercial and non profits; no free residential energy audits.

You can have the ducts spray foamed, but the ducts have to be installed in such a manner as to allow for completely foamed all around the duct.

Don't forget to account for mechanically induced pressure differences overriding that "cooler rooms will have less pressure" thing. Or wind induced pressure differences.

"I have noticed the Nest sacrifices comfort for efficiency...".

That is why I hate it. You can't fix a home's bad envelope with a t-stat, and the stat should come with that disclaimer.

Heat always flows from warmer to cooler. It does not care which direction that is. Air always flows from a high pressure to a lower pressure; so you can have cold air flow from one room into a warmer...

You've got about 5 minutes to get the smoke into the meat; the reason why is something any HVAC guy can understand - heat flows from hot to cold. Hot smoke and cold meat gets that good smoke ring...

Lots of people working on ideas and even have patents on their concepts. Here is one I found, but I know there are a ton of other ideas out there. Don't know if any are available to homeowners yet....

A recent study found that a/c's that had regular maintenance had more problems than those that did not. I wish I could find it again to see the details of the study. My guess was that the reason was...

Here's a quote from a guy living in Texas:

"I heat & cool at least 4,000 sq. ft. with one 2 ton heat pump in north central Texas."

You can read more of Paul42's posting here:...

Ditto.

Hard water filling the tanks up with sediment?

The only "best" way, for residential, I've heard about is using a duct blaster as an active flow hood. A ductblaster certainly cost more than a "minivane".

Thanks.

Just trying to get a rough idea as to how much does heat rising up from the first floor reduce a 2nd floors heat load calc.

Maybe the common/neutral/white wire is the one run through any safety switches? Had a RTU like that once and didn't pick up on it right away 'cause I didn't test voltage across the coil, just put one...

I think we're having a mis-comunication here. The r-value of the wall using .31 would be off the hook! I found an article that explained how to answer my own question. I only learned, so far, how to...

Can someone please tell me what the heat transfer multiplier would be for a one foot thick wall that is brick veneered 8" structural hollow clay tile wall that is plastered on the interior with no...

Yeah, Ra called me right back up with answers. Still waiting to hear back on how to model in a room with knee walls, and part sloped, part flat ceiling.

Here's a link to it.
http://flopro.taco-hvac.com/designer_support_landing.html

Anyone using it, have any pro or con comments as to its accuracy compared to other software? It's free, so it makes...

Whys Unarrells picture look like he don't have a shirt on?

Shirts hadn't been invented yet when he had that pic taken.LOL.

When I get the money to buy I will. At this point I am just trying to learn on the cheap. Common sense tells me that the only thing we are concerned with is conditioning the living space. We need to...