[Greenbuilding] controlled combustion air supply

[Ross Elliott]

Thanks John. The builder already installed a 4" combustion air supply to the
fireplace like you suggest, but backdraft testing indicates he needs another
6" hole. Although ideally it should feed directly to the fire, the second
best place is anywhere in the house, like through a cold storage room in the
basement, particularly if the damper only opens when needed, which is rarely
(range hood, bath fans, dryer and central vac all on at the same time as the
fireplace). I'm sure pressure actuated electric dampers are available, just
not sure where. If it were my house I would just crack open a window (or
stop vacuuming / turn down the super-sucker range hood) if the fireplace
started smoking up the house, but NRCan has certain rules for R-2000
houses...

Ross

-----Original Message-----
From: John Straube [mailto:jfstraube at gmail.com] 
Sent: Thursday, June 23, 2011 10:24 PM
To: relliott at homesol.ca; Green Building
Subject: Re: [Greenbuilding] controlled combustion air supply

Perhaps you can't retrofit it but most airtight wood stoves and fireplaces
can be installed with an outdoor air supply. This de couples the chimney and
the hole and does not need to violate the air barrier. This is what we
always recommend and after  several house tests (and my own home) it works
and is simple. 

Sent wirelessly from my BlackBerry device on the Bell network.

-----Original Message-----
From: "Ross Elliott" <relliott at homesol.ca>
Sender: greenbuilding-bounces at lists.bioenergylists.org
Date: Thu, 23 Jun 2011 20:14:26 
To: <greenbuilding at lists.bioenergylists.org>
Reply-To: relliott at homesol.ca,
	Green Building <greenbuilding at lists.bioenergylists.org>
Subject: [Greenbuilding] controlled combustion air supply

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