Navien combi boiler installation completed at Maverick Street in Marblehead, MA. Removed the old boiler and water heater and installed a high-efficiency Navien combi system with new gas and vent piping, updated pumps and controls, a new condensate pump, and full system wiring. Installed new baseboard heating in the master bedroom, re-piped supply, return, and domestic water lines, added Honeywell smart thermostats, and replaced a damaged PVC vent section. Efficient heating and endless hot water are now restored.