Dual Battery
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=16867
Printed Date: August 03, 2025 at 1:09 PM
Topic: Dual Battery
Posted By: mj239air
Subject: Dual Battery
Date Posted: July 30, 2003 at 6:21 AM
I was just wanting to ask you all when I put a second battery inside my vehicle how well does it have to be vented? I am using an Optima Yellow top in my Suburban and the second battery is in the cargo area. Can I just have a small tube that goes to the outside, or do I need to have a larger opening with a fan and everything? Any help would be greatly appreciated.
Replies:
Posted By: iaudio
Date Posted: July 30, 2003 at 7:58 AM
According to the IASCA rulebook a minimum vent diameter of 1/4" is required to the outside of the vihicle but fans are not required.
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Posted By: speedwayaudio1
Date Posted: July 30, 2003 at 9:34 AM
optima batts are sealed they don't need to be vented, but it will not hurt to vent it.
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Big Dave
Posted By: mj239air
Date Posted: July 30, 2003 at 6:57 PM
Thanks IAUDIO, that is what I was wondering on the vent size. I know the optima is sealed but knew that their rules said needed to be vented somehow.
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