Performed pm on gas furnace and gas space heater Brushed and vacuumed burner tubes Inspected and vacuumed burner, blower compartments and surrounding area Checked electrical connections and safeties Checked gas pressure Performed combustion test Furnace Inlet pressure-12.46 in.w.c. Manifold pressure-3.313 in.w.c. Unit heater Inlet pressure- 12.25 in.w.c. Manifold pressure- 3.385 in.w.c. While performing the maintenance we found the inlet gas pressures were higher than the manufacturer recommends. The max inlet pressure is supposed to be less than 12 in.w.c. Recommend having the gas company come out and adjust the gas meter pressure slightly.