How Natural Gas-fired Humidification Works
The natural gas-fired humidifier generates steam for humidification, using gas burners which are fired into a heat exchanger. The heat exchanger is submerged in a tank of water. When there is a call for humidity, the burners fire and generate steam until the call for humidity ends.

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Legend |
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| 1. Stainless steel boiler | 8. HumiControl |
| 2. Aluminum heat exchanger | 9. 10. 11. Water inlet assembly |
| 3. Clean-out cover | 12. Fill cup – conductivity probes |
| 4. High level foam probes | 13. Boiler overflows |
| 5. Forced draft gas burner | 14. Triple float level control |
| 6. Gas inlet | 15. Boiler temperature sensor |
| 7. Flue temperature sensor | 16. Drain pump |