HvacTech2 wrote:

Z Here's a link for you to read up on...

http://lennox.com/pdfs/brochures/Len...umidifiers.pdf

it doesn't do any good to show him the truth. This guy is a legend in his
own mind and doesn't believe anything other then what he thinks.

It's surprising how little hvac installers know about physics and comfort.
You'd think they'd be curious, beyond the everyday nuts and bolts, or feel
some sense of responsibility.

We might try this in two steps:

1. The ASHRAE 55-2004 comfort standard says 69 F at 39% RH and 69.8 at 19%
are equally comfortable (PMV = -0.542.) Do you disagree with this?

2. Keeping a house 69 F at 39% RH uses more energy than keeping a house
69.8 at 19% in wintertime. Do you disagree with this?

If so, where are your calculations?

Nick