Furnace start up. Cycled system. Checked electrical system, ok. Checked incoming LP gas pressure. Found incoming was 10.65 IWC. No regulator found on gas line. Water heater is electric. Adjusted outgoing gas pressures to maximize efficiency. Checked for gas leaks, none found. Checked for CO and XS air in exhaust, normal levels found. No CO found in airstream. Checked temp rise and fan speed, ok. System operating normal at this time. Job complete.