Air handling unit xxx has a xxx kW electrode steam humidifier. Electric humidification is the traditional way to humidify a building space, but is very expensive compared to more modern methods.
We recommend installing a natural gas fired humidifier. These humidifiers introduce steam into the air stream, in the same manner as a electric units, except that heat is supplied by less expensive natural gas. Installation will involve supplying natural gas to the new appliance and making proper arrangements for introduction of combustion air and venting of flue gases.
ref: Neptronic SKG