Home About Us Contact Us Home About Us Services Projects Our Blog Energy Investment Systems EIS has provided energy services to area apartment buildings since 1983 Cost Reductions EIS works closely with its clients to develop custom improvement packages that maximize operating cost reductions and program incentives to offset capital costs Oil to Gas Conversions Switching from oil to natural gas can significantly reduce your building’s energy bills, even as it lowers your carbon footprint. All previous next Latest Articles Lewis Kwit to Speak at 37th Annual CNYC Housing Conference on November 12, 2017 Get a head start on benchmarking your energy usage for next year Balancing 1 Pipe Steam System EIS Sustainability Audit Uncovers $750,000 Billing Irregularity Copyright Energy Investment Systems