How to Increase Humidity in a Server Room Without Breaking the Bank?

It sounds like a tricky situation since you have a mini-split AC already. One suggestion is to consider installing a humidifier that connects directly to a water source, but be cautious, as electronics and water don't mix well. Have you checked if your AC unit can support a humidifier? Also, using a humidity monitor might help you keep an eye on things. Generally, you want the humidity to be between 40-55% to avoid issues like static or condensation.

You're right about the low humidity being problematic. The ideal relative humidity for a server room is typically around 50%. In your case, it might be worth consulting with an HVAC technician to see if your AC unit is the right size. An oversized system can cool things down too quickly and actually lower the humidity more than you'd like. It's a common issue in residential setups, too, so you're not alone in this!

I can relate to your situation! I used to drag a humidifier into my server room and keep filling it up every couple of days, but it got old quickly. Luckily, I haven't had any server failures, but I do think it's best to find a more permanent solution. Look into ultrasonic humidifiers designed for data centers; they can maintain optimal humidity without needing constant attention. Just make sure it’s a standalone unit if you decide to go that route!