With rising energy costs, the ROI is better than ever! On Site’s proven PSA (pressure swing adsorption) technology gives you quick returns on your investment and stable year-to-year gas costs. If your company uses as little as two cylinders (244 CF/7M3) per week, you’ll benefit from an on-site system. Bottled and liquid gases can be costly due to production, rental charges, transportation expenses, and bulk user evaporation losses.