Replace three (3) HVAC boilers at Environmental Services Facility. Current units are at end-of-life. Minimum specs are: natural gas-fed at 150CFH; input 1,500,000 BTU/HR; output 1,400,000 BTU/HR; forced-draft burner on 120V/single-phase power; support communication protocols for LON, BACnet, and IoT. In addition to materials provision, awarded vendor shall perform the following tasks: verify all pipe, conduit, and wiring spec in field prior to proposal; remove and dispose of existing units; disconnect and reconnect hot water lines; disconnect and reconnect all electrical wiring; disconnect and reconnect controls; assess and add/modify any unit drainage systems; run new stainless double wall flue pipes to exterior and terminate at roof; perform combustion analysis to assure proper operation; insulate all piping; perform startup and operation check after install; and any other tasks necessary to ensure optimal operation upon completion.