Specifications include, but are not limited to: The replacement of the domestic hot water system at the West Springfield Middle School, 31 Middle School Drive, West Springfield, MA, 01089. The work includes, but is not limited to the following: 1. Remove and properly dispose of two existing natural gas hot water heaters 2. Furnish and install 5 Navien model NPE-240 natural gas heaters or approved equal 3. Hook up new units to existing recirculating system 4. Re-install all necessary plumbing and natural gas connections. Install necessary venting, and electrical connections to current code requirements-project is to be considered turnkey at completion 5. Work must be performed between August 10 and August 24, 2019. After hours and weekend access can be accommodated.