Lochinvar Fire Tube Boiler
How the Fire Tube Boiler Runs The Lochinvar Fire Tube Boiler runs efficiently and smoothly, and stays running without frequently turning on and off. An FTX500 fires at its maximum 500,000 Btu/hr rate when heat load is highest, then gradually goes as low as 10% (50,000 Btu/hr). The boilers have ...