[Greenbuilding] state of the art stove/bathroom exhaust fans?
Michael O'Brien
obrien at hevanet.com
Wed Dec 24 21:58:35 CST 2014
Hi, Reuben--
Here's some average RH stats for Oregon cities.
OREGON
YEARS JAN FEB MAR APR MAY JUN JUL AUG SEP OCT NOV DEC ANN
M A M A M A M A M A M A M A M A M A M A M A M A M A M A
ASTORIA, OR 40 40 86 78 87 74 88 71 89 69 90 70 90 71 90 69 91 70 91 69 90 73 88 77 87 80 89 73
EUGENE, OR 36 49 92 80 92 72 92 64 91 58 91 54 90 49 88 38 88 39 89 43 94 62 93 79 93 84 91 60
MEDFORD, OR 32 32 90 71 88 57 86 50 84 44 83 39 79 33 74 26 75 27 79 29 86 43 92 67 91 76 84 47
PENDLETON, OR 52 54 80 75 79 65 74 50 71 42 69 37 65 32 54 23 54 26 61 32 72 46 79 69 82 78 70 48
PORTLAND, OR 53 53 86 75 86 67 86 60 86 55 85 53 84 49 82 45 84 46 87 48 90 62 88 74 87 78 86 59
SALEM, OR 31 31 87 75 88 68 87 61 87 57 87 53 87 49 86 41 86 40 87 45 90 59 90 76 88 80 88 59
SEXTON SUMMIT, OR 7 22 80 72 79 70 84 68 84 63 74 53 73 49 65 40 67 42 66 45 70 58 81 75 79 75 75 59
M = Morning
A = Afternoon
From www.shorstmeyer.com/wxfaqs/humidity/rh.html
Best,
Mike
Mike O'Brien Photography
mikeoregon.zenfolio.com
On Dec 24, 2014, at 2:19 PM, Reuben Deumling <9watts at gmail.com> wrote:
I look forward to this discussion.
I'll just answer the very first question, in my case the fan(s)--and I'd love to combine both stove and shower intakes--are for removing moisture from the interior. We have 98% RH outdoors for months at a time here in the PNW, and inside we're in the low seventies which strikes me as far too humid.
On Wed, Dec 24, 2014 at 2:16 PM, Alan Abrams <alan at abramsdesignbuild.com <mailto:alan at abramsdesignbuild.com>> wrote:
more generally, what about the role of any exhaust system? how does depressurization affect other conditions and systems? is there an ERV, and if so, is it balanced to admit compensatory make-up air? are there any combustion systems, or fireplaces with imperfect flue dampers?
is it possible to reduce the number of exhaust openings, by collecting air from individual spaces with a central fan? What about the routing of the exhaust line; given it will tend to be at ambient conditions, how is the line insulated, and how well does the damper work? How does the new requirement for make-up air for range hoods greater than 400cfm come into play?
these factors may have as much as--or more significance than--the fan unit itself.
No answers tonight, we've already opened a bottle of Cab.
Merry Christmas to all, and to all, good-night!
Alan Abrams
certified professional building designer, AIBD
certified passive house consultant, PHIUS
certified passive house builder, PHIUS
cell 202-437-8583 <tel:202-437-8583>
alan at abramsdesignbuild.com <mailto:alan at abramsdesignbuild.com>
HELICON WORKS Achitecture and Education <http://www.heliconworks.com/index2.html>
On Wed, Dec 24, 2014 at 4:14 PM, ErgoDesk <ergodesk at gmail.com <mailto:ergodesk at gmail.com>> wrote:
Try Google, low-wattage/high efficiency exhaust fans - http://goo.gl/tySU2D <http://goo.gl/tySU2D>
Sincerely,
George Hawirko
http://about.me/StyroHome <http://about.me/StyroHome>
On Wed, Dec 24, 2014 at 12:47 PM, Michael O'Brien <obrien at hevanet.com <mailto:obrien at hevanet.com>> wrote:
Hi, Reuben--
Start with Panasonic fans--low wattage, durable, quiet--see what you think.
Happy Christmas,
Mike
Mike O'Brien Photography
mikeoregon.zenfolio.com <http://mikeoregon.zenfolio.com/>
On Dec 24, 2014, at 12:33 PM, Reuben Deumling <9watts at gmail.com <mailto:9watts at gmail.com>> wrote:
I'm curious to learn where to begin my search for low-wattage/high efficiency exhaust fans.
Thanks for any tips.
Reuben
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