bigfootford wrote:
My 2000 9.6 2500 has a 3in vent that the battery actually sits on..Crazy.... Got to vent those hydrogen gasses somewhere... My battery box is only tall enough for 2 group 24's. 27's nor 6'ers will fit. Let me tell you what a pain in the butt it was to pull those batteries out of there to check electrolyte and measure SG...... I gave up on FWC batteries years ago.. I now run with 1 Lifeline AGM... I installed it 7 years ago, never pulled it out and rarely even open the access door. It still produces spec AH and voltage, honest!
Jim
IF under some extreme circumstance your AGM were to release H gas, would escape upwards as H gas is lighter than air.
HTH;
John