[Greenbuilding] sacies condensation prob

[barbara deane-gillett]

you need better windows (r5 not r3)  and more air circulation near the windows (to prevent the localized cold spots) . 
 
 i've run into this problem, localized condensation on the lower edges of good (r3 low-e) windows in mild temperate climates.
 
and you could lower the inside rh to 30% on cold days (easily done with an air to air htx)
 
another solution is a good paint on the wood surfaces and keeping it repainted (so the condensation is harmless) . > > > > ------------------------------> > Message: 2> Date: Mon, 03 Dec 2007 09:33:00 -0600> From: Sacie Lambertson <sacie.lambertson at gmail.com>> Subject: Re: [Greenbuilding] Exhaust Only Passive Inlet Ventilation> To: "Nick Pine" <nick at early.com>,<greenbuilding at listserv.repp.org>> Message-ID: <475422c5.080e240a.33d4.5e1f at mx.google.com>> Content-Type: text/plain; charset=us-ascii; format=flowed;> x-avg-checked=avg-ok-CA83B18> > Nick, John et al,> > This morning is typical. High teens outside, RH in the 40s inside, > with temps in the mid to high 60s and a nice bead of water across the > base of every window in the house, including those that are > inoperable. Simple difference between indoor and outdoor > temps? Comment please?> > Second question: if there are no vents below or above (an open, > therefore multi-story house with no ability to close either up or > down) and a small exhaust (don't know how many cfm pulled) in the > main center floor, what is the effect? House tight, but many many windows.> > thanks, Sacie