[Greenbuilding] Greenbuilding Digest, Vol 67, Issue 10

[Vadurro, Rob, EMNRD]

Way back in architecture school, we were told that the windows were where the heat loss (gain) was most pronounced, so to provide the most even heating (cooling) the heat (cool) delivery was to be placed there. I think reality is more complex; heat (cool) distribution being the real concern,  I think it comes down to how well the heat (cool) gets around the space. Perhaps a ceiling fan, or a Big A$$ fan could take care of that better than the registers at the windows.

Rob Vadurro, AIA
Park Architect
New Mexico State Parks
1220 South Saint Francis Drive
Santa Fe, NM 87505
505-476-3383
505-476-3361 fax

From: Greenbuilding [mailto:greenbuilding-bounces at lists.bioenergylists.org] On Behalf Of Alan Abrams
Sent: Monday, March 28, 2016 2:14 PM
To: Green Building <greenbuilding at lists.bioenergylists.org>
Subject: Re: [Greenbuilding] Greenbuilding Digest, Vol 67, Issue 10

Reuben-

can you take advantage of the coanda effect, in which a stream of air enjoys scurrying along a flat surface? If so, yes, shorten duct runs accordingly. And maybe reduce fan size, too, if you're reduced enough static pressure.

https://en.wikipedia.org/wiki/Coand%C4%83_effect

-aa

Alan Abrams
certified professional building designer, AIBD
certified passive house consultant, PHIUS
certified passive house builder, PHIUS
cell     202-437-8583
alan at abramsdesignbuild.com<mailto:alan at abramsdesignbuild.com>
HELICON WORKS Architecture and Education<http://www.heliconworks.com/index2.html>

On Mon, Mar 28, 2016 at 4:00 PM, barbara deane-gillett <deaneg at hotmail.com<mailto:deaneg at hotmail.com>> wrote:
go for it and harvest the ductwork savings

Sent from my iPhone

On Mar 28, 2016, at 2:01 PM, greenbuilding-request at lists.bioenergylists.org<mailto:greenbuilding-request at lists.bioenergylists.org> wrote:

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>   1. forced air heating vent placement (Reuben Deumling)
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> Message: 1
> Date: Mon, 28 Mar 2016 10:55:47 -0700
> From: Reuben Deumling <9watts at gmail.com<mailto:9watts at gmail.com>>
> To: Greenbuilding <greenbuilding at lists.bioenergylists.org<mailto:greenbuilding at lists.bioenergylists.org>>
> Subject: [Greenbuilding] forced air heating vent placement
> Message-ID:
>    <CAE5fceB0kxKhTGAAqdOOWwTK26mXib8Jr3-gwXeJS7wwMJPY7g at mail.gmail.com<mailto:CAE5fceB0kxKhTGAAqdOOWwTK26mXib8Jr3-gwXeJS7wwMJPY7g at mail.gmail.com>>
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> There seems to be a tradition of placing these all the way out at exterior
> walls, and often under windows. Does this hark back to when windows were
> the coldest surfaces and this would--in combination with a floor vent--make
> for convective currents which could then be relied on to mix the warm air
> better?
> I'm in the process of adding four inches to the inside of the exterior
> walls on a 140 year old farmhouse and blowing a ton of cellulose into those
> deeper cavities. There will be exterior storm windows and the house overall
> should end up pretty tight and cozy even without the furnace turned on. I
> have to move some of these vents as they are too close to the existing
> wall; my temptation is to shorten the ducts, not just by a few inches but
> perhaps by a bunch. I'm curious for any thoughts or suggestions you might
> have.
>
> Thanks very much.
>
> Reuben
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