Specifications include, but are not limited to: Building 101 contains two boilers (lead-lag). One (1) of these boilers was not operational and was removed by DMIL staff. The new boiler shall match the remaining boiler which is a Weil McLain 78 boiler, model #1078, series 1; natural Gas. The new replacement heating system shall be complete with a programmable system so that once installed the heating system will run lead-lag with the other boiler. Furnish and install the following major heating system components and accessories per manufactures specifications; a. New Weil McLain 78 boiler, model #1078, series 1; natural Gas b. Burner Power Flame Burner ( Natural Gas), model WCR2-G-15 c. Expansion tank (minimum MAWP Water 60 PSI at 250 degrees maximum Fahrenheit) d. Controller with BacNet capability e. Galvanized steel double wall manufacture specified breeching f. Three (3) actuators must be compatible with the Controller g. Three (3) mechanical zone valves (must support actuators)