1992 ASHRAE handbook
heating, ventilating, and air-conditioning systems and equipment American Society of Heating, Refrigerating and Air-Conditioning Engineers ... ANSI Standard Z21.47 requires the heating capacity to be marked on the rating plate of commercial furnaces. ... Currently, gas furnaces have steady-state efficiencies that vary from 75 to 95%. ... installed on indoor furnaces since the ICS method assumes the use of outdoor combustion air with the furnace installed in an unconditioned space.
| Title | : | 1992 ASHRAE handbook |
| Author | : | American Society of Heating, Refrigerating and Air-Conditioning Engineers |
| Publisher | : | American Society of Heating Refrigerating and Air-Conditioning Engineers - 1992-12 |
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