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by IndrekR 2302 days ago
> Humidifying only 600 square feet, the size of a studio apartment, takes about 5 gallons of water per day in winter.

This heavily depends on the ventilation as well. With ERV HVAC[1] it is much easier to keep higher humidity level as some of the moisture is reintroduced in the heat exchanger.

[1] https://en.wikipedia.org/wiki/Energy_recovery_ventilation