To convert Nm³/hr to m³/hr, you need to know the actual temperature and pressure of the gas. Here's the conversion formula:

m³/hr = Nm³/hr * (P_STP / P_actual) * (T_actual / T_STP)

where:

• P_STP is the standard pressure (101.325 kPa)
• P_actual is the actual pressure of the gas
• T_STP is the standard temperature (273.15 K)
• T_actual is the actual temperature of the gas

If you don't have the actual temperature and pressure of the gas, you can assume standard conditions and the conversion factor is simply 1:

m³/hr = Nm³/hr