The right humidifier depends on site conditions, not only rated capacity. Airflow, water, maintenance and control all matter.
Check area, height, temperature, ventilation and current RH before deciding capacity.
A complete humidifier is faster to install. Modules are better when the customer is building their own tank or machine.
Water quality and cleaning interval should be considered before purchase, especially for long-hour operation.
Project note: For selection, prepare room size, target RH, ventilation, available water quality and installation restrictions.