Our client had a 30+ year-old failing gas boiler and a rotted-out gas water heater. We prefabricated a new Navien high-efficiency gas combination heating boiler and tankless water heater at our shop. Brought it out mostly assembled. Removed his old system. Mounted the new high-efficiency Navien unit to the wall and made the final connections. In and running in 1 day. This client got a $2,400 rebate from gasnetworks and got a 0% interest 7-year loan from MassSave.
