Upflow/horizontal and dedicated downflow gas-fired, direct/non-direct vent, 2-stage condensing variable speed furnaces with variable speed draft inducer, upflow, convertible to horizontal right or horizontal left/downflow only (120 pages)
Upflow/horizontal and dedicated downflow gas-fired, direct/non-direct vent, single stage / two stage condensing furnaces with high efficiency motor (128 pages)
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