On Sat, 4 Jul 2015 05:49:36 -0700 (PDT), "Dave, I can't do that"
wrote:

On Saturday, July 4, 2015 at 2:01:53 AM UTC-7, Gunner Asch wrote:


a window..and the exhaust are two screened windows at the far end. One

We are trying to get away from leaving windows open when no one is home.

The up-dux is recommended by local HVAC people so figured mold must not be an issues as I doubt they would install stuff that didn't meet Code. OR maybe there isn't a Code for them.

I have been using an anemometer and the swamp company's suggested exhaust area/flow and two of those registers is close enough.

I take the point about possible mold so will look for alternative vent placements. I have read that with the ceiling vent, attic vent fans might be a good idea. That seems crazy to vent to ceiling then have to add more stuff to fix the problems of venting to ceiling.

I may just fill in two windows (one each room)with plywood and install the registers. Both exhaust rooms have three other windows each, so it will still exceed Code for light etc.

Or you could simply weld up a pair of security bars ..standard in many
homes and install them over those two windows.

This would provide security and not block off the view or the
lighting. It would appear you are concerned about crooks entering..so
the bars would meet that need well enough. Perhaps give you some
practice at wrought iron type work.

Gunner