Venting [RE-wrenches]

[Jeff Yago]

We site build battery boxes using hard foam board insulation covered with
the concrete/fiberglass matte material used for commercial stucco exterior
finish.  This makes a battery box with very solid and strong walls and
floors. The boxes are very air tight and the material will take water and
acid spills with no damage.  The boxes have a hinged and gasketed top and a
2"PVC vent at the top back on each end that lead to the outside which are
covered by insect screen.

Anyway, we always include a 1"PVC drain line in the bottom to allow seasonal
wash down but found the drains had to be capped due to negative air pressure
inside the home on windy days that "sucked" battery fumes through these
drains and into the home interior.  We have seen this problem on many
different home designs and construction, from very "loose" to air tight
exteriors.  Do not underestimate what a little wind can do air pressure
differentials. We have started using powered battery box vents controlled
from the extra relay in a Trace SW inverter set for the upper charging
voltage range.  Hope this helps.

Jeff Yago


- - - -
To send a message: RE-wrenches at topica.com

Archive of previous messages: http://www.topica.com/lists/RE-wrenches/

List rules & etiquette: http://www.mrsharkey.com/wrenches/etiquete.htm

Check out participant bios: www.mrsharkey.com/wrenches/index.html

Hosted by Home Power magazine

Moderator: michael.welch at homepower.com

==^================================================================
EASY UNSUBSCRIBE click here: http://topica.com/u/?bz8Qcs.bz9JC9
Or send an email To: RE-wrenches-unsubscribe at topica.com
This email was sent to: michael.welch at homepower.com

T O P I C A -- Register now to manage your mail!
http://www.topica.com/partner/tag02/register
==^================================================================