Lochinvar, LLC releases the NOBLE™ Fire Tube Combi Boiler for residential applications. With three models ranging from 110,000 to 199,999 Btu/hr., the Noble boiler offers easy installation and serviceability, true instantaneous response time and a user-friendly interface. In addition to 10:1 turndown and 95 percent Annual Fuel Utilization Efficiency (AFUE), the Noble Fire Tube Combi Boiler is designed, engineered and assembled in the USA.
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Hydronic buffer tanks are utilized to provide thermal storage volume when the system demand is less than the lowest firing rate of the boiler. This occurs most often when there are “micro” zones in the distribution system whose demand is below the minimum firing rate of the boiler. Under these conditions the boiler fires at its minimum rate, which is more energy than can be absorbed by the distribution system, and shuts off because of high return temperatures before the “micro” zone’s call for heat is satisfied. The boiler system continues to receive a call for heat and fires again. The “micro” zone cannot absorb all the energy produced by the boiler, and again the boiler shuts off because of high return temperatures. With the volume provided by the tank the additional energy not utilized by the “micro” zone can be stored in the buffer tank and used when there are additional heating demands
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- capacities from 30-120 gallons
- 5 year limited warranty