What is the range for inlet gas supply pressure?
The minimum natural gas supply pressure must be at least 4.5" w.c., and the maximum should not exceed 10.0" w.c.; while propane gas requires a minimum of 11.0" w.c. and a maximum of 13.0" w.c., to prevent unreliable operation or equipment damage (Page 19).
From the official Goodman Gm9s96 manual, page 19
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