The cost of a pad will depend on the design required by your gas producer. But you don't buy the tank per se. You actually rent the tank based on how long you plan to use it. When I investigated it last the pad cost was about $1.5k. Small tank rental (1000Litres) was $250/month. Plus cost of gas and delivery. Talk with your gas supplier they can help. But I also don't think you will need the nitrogen for all of lead free !! We have done some trials and saw no difference in air or nitrogen for reflow. We have not gotten there but I think the only thing nitrogen does for lead-free wave is keep dross down somewhat. Best Regards, Mark Krmpotich DFx Engineer World Wide Operations Technology Scientific Atlanta Tel: 770-236-5166 Fax: 770-236-4707 mailto:[log in to unmask] http://www.scientificatlanta.com/ -----Original Message----- From: Dave Chapman [mailto:[log in to unmask]] Sent: Monday, February 23, 2004 2:22 PM To: [log in to unmask] Subject: Re: [TN] Nitrogen > -----Original Message----- > From: Dave Chapman Circuit Service [log in to unmask] > Sent: Monday, February 23, 2004 1:26 PM > To: [log in to unmask] > Subject: [TN] Nitrogen Does anyone have a ballpark figure for installing a Nitrogen tank on a pad outside our building? We have two ovens and two wave machines and with Lead Free we anticipate higher usage and we are thinking to go big on Nitrogen rather than the tanks we now use. Is it a 10K investment or 100K? 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