[SpamCop-Social] Re: house heating was jump pump yada yada...
devnull at spamcop.net
Thu Sep 15 22:23:38 EDT 2005
| >| Houses are supposed to breathe.
| > The breathing is the outer shell of the house the part between the
| > brick (or wood outer wall) and the vapor shield. That's why brick
| > homes have weep holes and lath houses are not sealed.
| > The inner house (due to energy efficiency designs) is sealed and if
| > properly designed uses a counter current heat exchanger design to
| > vent/exchange air. If there is a negative pressure the venting is not
| > correct and the house will back flow air down a chimney flue,
| > resulting in soot/ash and poison gases in the living area.
| Nope. not falling for it. Sorry. Thanks for sharing. Air must be
| exchanged inside the house. And that cannot happen without an air
| exchanger and/or negative pressure. Often both. But that's not the
| The canadian standards association specs require .3 air changes per hour
| residential construction. ASHRAE requires .35 changes per hour. You
| cannot have this with air tight construction. There must be ventilation.
| And that will not flow from inside to outside. Say all you want about
| venting CO - it doesn't apply. Back flow in chimneys is related to where
| the fire gets its fuel - not to the pressure in a house. If the fuel has
| adequate air supply - unfettered and directly from outside - then the
| of which you speak does not exist.
Ok just hope you don;t have white upholstery/walls/sheets etc.
Hint you might want to spend some time reviewing thermodynamics as it
applies to gas flow dynamics.
As to venting just what do you think the counter current heat exchanging
vent is intended to accomplish?
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