Providing Humidity Indoors-Warm mist or Cool mist

[FourN6]

Hello,

I recently set up an indoor "greenhouse" for some of my smaller orchids. The temperature in the space has certainly improved and sits around 80F give or take a few degrees during the day if I leave a small fan running. Without the fan, temps go up to near 90F. At night the temperature may only drop 10 degrees since its summer but in the winter I'll get a much more drastic drop since I keep my house pretty cool.

One thing I have noticed is that I still struggle with humidity, despite it being summer. Humidity in the growing space is typically around 40%. I have multiple humidity trays but its not enough so I want to invest in a small humidifier for the space.

My question is: Should I purchase a warm mist or cool mist system? Both are affordable and small enough for my growing area. Recommendations are much appeciated. Thanks!