How does the hotel calculate the natural gas consumption?

The certificate of each furnace has its simple parameters, including the gas consumption per hour. For example, the gas consumption per hour of the two-eye frying furnace is 4.2*2=8.4. Add up the gasoline consumption per hour. If it is a large hotel, the gas consumption can be determined according to 75% of the gas consumption of all gas equipment. If the hotel has a room, we should also consider the gas consumption of its direct-fired machine (whether it is central air conditioning) and boiler, but the gas pressure of these large-scale gas-using equipment is also different, so it cannot be added with the gas consumption of the cooker, and it should be calculated separately.