[Greenbuilding] forced air heating vent placement

Michael O'Brien obrien at hevanet.com
Mon Mar 28 18:39:42 CDT 2016


Hi, Reuben—

Yes, and the warm air from the registers under windows helped dry off condensed water running down the interior side of the glass, which in turn reduced the stains and mold on frames and sills.

Best,

Mike

On Mar 28, 2016, at 3:01 PM, home-nrg <home-nrg at dnaco.net> wrote:

Reuben,

You might check out the research done by Build America, some
years back.

As I recall,they were able to design a single family house
with all of the ducts in a central wall cavity and, by using
a more a focused grill, place the supply grill on the inside
(duct) wall and through conditioned air to the far wall. The
arrangement conditioned the room as quickly as a similarly
sized system with supplies on the outside wall.

Check their reports; don't trust my memory.

I hope this is helpful.

Bob Klahn

----- Original Message Follows -----
From: Reuben Deumling <9watts at gmail.com>
To: Greenbuilding <greenbuilding at lists.bioenergylists.org>
Subject: [Greenbuilding] forced air heating vent placement
Date: Mon, 28 Mar 2016 10:55:47 -0700

> 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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