battery box venting flow rate? [RE-wrenches]

[Allan Sindelar]

One of the best features of the Power Vent is that it has a simple and
effective backdraft damper built into it. As we often have less control over
battery rooms and home ventilation on off-grid systems, especially with
upgrades to existing systems, we often recommend or require the Power Vent,
if only for the backdraft protection.
Allan at PosE

----- Original Message ----- 
From: "Jeff Yago" <jryago at netscape.com>
>
> I typically never rely on passive ventilation especially for a battery
> container, because as John Wiles was stating you could get exterior
> forces pressuring the air back into the container.
>
> - - - - - - - - - - - - - - - - - -
>
> The house was small and every time the wind blew, we had MAJOR air flow
out of this battery box bottom drain pipe into the basememt, almost like it
had a blower behind it!


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