Heavy-duty aluminized-steel tubular heat exchanger
Stainless-steel secondary heat exchanger
Single-stage gas valve
Durable Silicon Nitride igniter
Quiet single-speed induced draft blower
Self-diagnostic control board with constant memory fault code history output to a LED
Installation:
GR9S96 - Upflow, horizontal left or right
GD9S96- downflow, horizontal left or right
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