Goodman 80% AFUE 100k BTU Two Stage Upflow Furnace GR9T801004CN - Replacement for GM9C801004CN CSR-U-2 This system is certified by

This system is certified by AHRI under certificate number 214858988

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or in a closet on the bottom floor

Goodman 80% AFUE 100k BTU Two Stage Upflow Furnace GR9T801004CN - Replacement for GM9C801004CN CSR-U-2 This system is certified byThis is the Goodman GR9T801004CN, a upflow horizontal, two stage, 80% AFUE, 100k BTU 9 speed furnace. What does that all mean? Keep reading. Orientation: This unit is designed to be used in a upflow or horizontal configuration. These are generally installed in an attic, crawl space, or in a closet on the bottom floor. Efficiency: With an 80% average fuel utilization efficiency (AFUE), 80 cents of every dollar you spend on fuel will be converted into