Need a little help? OK, I need all the help I can get? Recently accepted the job of Health & Safety Officer in my 380 member, 18 Fire House Department. I oversee PPE & SCBA purchases and issues. We normally replace 40 - 50 SCBA bottles a year? Need to purchase at this time and want to do research on changing them to 45 minute? This air management being on the forefront lately, I need as much info as possible to make this change. Like your departments, change is very difficult since we have only had 30 minute when SCBA's first purchased? Thanks in advance for any help you can give me.