Gas-Fired Steam Humidifier for
Commercial HVAC Systems

The Neptronic SKG4 is a high-performance gas-fired steam humidifier designed for demanding commercial and industrial HVAC applications. Engineered for precision, reliability and energy efficiency, it delivers clean, odour-free steam with a capacity range of 110 to 810 lb/hr (≈ 50 to 370 kg/h). Its stainless-steel combustion chamber and self-cleaning heat exchanger ensure long-term durability and reduced maintenance, while advanced modulation technology provides fast, stable response across varying load conditions.

The SKG4 integrates seamlessly into modern building automation systems with native BACnet MS/TP and Modbus communication. Compatible with tap, RO or DI water, and available in indoor or outdoor configurations, it offers maximum flexibility for new installations or retrofits. Combined with Neptronic’s steam distribution solutions, the SKG4 ensures efficient absorption and consistent humidity control in any environment.

Designed for European HVAC standards, the SKG4 delivers powerful performance in hospitals, clean-rooms, data centres, laboratories, AHU systems and industrial processes. Its compact footprint, rugged construction and high-efficiency operation make it a sustainable, cost-effective choice for modern humidification projects.