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Date: 2013-10-02 20:20:37Heating ventilating and air conditioning Fireplaces Energy Furnace Building engineering Engineering Industrial furnaces Annual fuel utilization efficiency Thermodynamics HVAC Flue Chimney | Measure Guideline: High-Efficiency Natural Gas FurnacesAdd to Reading ListSource URL: www.nrel.govDownload Document from Source WebsiteFile Size: 1,66 MBShare Document on Facebook |