AH510/AH515 Original Connect Humidifier

I use this one currently https://www.venta-air.jp/products/#originalconnect I was impressed of the chemicals you can buy with it, all the residue is left in the water and a simple rinse will be enough maintenance. The ones that steam the air for example, there will be a ton of calcium buildup in the meshes that wick up the water to be heated up and evaporated. I've tried many, the piezoelectric ones (those that op talks about) are the worst.

Venta branded humidifiers are great

I went through this exact same obsession last winter when my bedroom was hitting like 18% humidity, felt like I was living in the sahara desert. Ended up going with a Venta after reading through probably 50 forum posts and I'm pretty happy with it - thing's been running daily for about 8 months now with zero issues. The maintainence is actually pretty minimal despite what some people say, just rinse the discs every couple weeks and change the water regularly. Only downside is it's not the fastest at humidifying but for your size room it should handle it fine, plus it's whisper quiet which was huge for me since I'm a light sleeper. The build quality feels solid too, like it could run for years without breaking down

I have one.  Haven’t needed service so no idea about the customer support.  I’m not sure the Venta formula cost is cheap enough to offset the cost for physical wicks, but otherwise it’s fine.

Look up the venta humidifier. It spins a plastic cylinder of disks slowly and blows air over it. I got mine shipped from home depot but Amazon has them too. Get that and a bottle of steramine tablets. Put a half in once a month or two when you clean it. It won't get nasty, you don't need to replace any paper filters, it doesn't get mildew or messy gross like ultrasonic. And seems well built enough to actually be bifl.

This is discussed often on here. Add the Venta to your list. Expensive initially but no paper filters to replace and it's fully cleanable, unlike any of the mist humidifiers that build up gunk where you can't get at it, seals disintegrate etc. protip: look into stearamine tablets for the paper or venta humidifier. WIth a monthly or so cleaning, and a half to full tablet added each cleaning, I don't get Any slime buildup ever. Cheap too.

Get a Venta Humidifier, it's uses evaporation instead of the usual ultrasonic humidifier (which can be harmful). It's pricier but way easier to clean and maintain and last a long time. 

I use a Venta and I’m happy with it. Yes it’s marketed as an air purifier, but I have a coway air purifier that I run all the time anyway.