A steam humidifier like a Nortec would work quite nicely, but they can't pump the steam very well, as it's convection driven. They do produce a very slight pressure, but as I understand, aren't allowed to be capped. (Ie. With a hose)
A portable unit would be the most convenient, easier, and cheapest.
Cheers!
A portable unit would be the most convenient, easier, and cheapest.
Cheers!