I use a nebulizer for four different medications, each one is 10-15 minutes. I can honestly say that I that at one point I hated using it because of the length of time it took. Now I am so thankful for it, I can actually get up and walk around. 😀

I have 2 plug in nebulizers. Both are made by Drive. One is a little smaller for portability reasons and it takes about 20 minutes to do my 3 ml treatment. The other takes about 15 minutes to do my 3 ml treatment. Both are about 8 years old.

I use the plug in nebulizer with Ipratropium/Albuterol. I use a mask and it takes about 15 min I just sit and play a game on my phone while doing my treatments

Hi AliceRose, I use a home unit most of the time and it takes just about 10 minuets to do a treatment. I use a potable one sometimes when I am out of the house, it also takes about 10 minuets. I've been using a nebulizer for about 6 years, now 4x a day.
I would agree with your thoughts on the calcium build up. As with my home unit I still replace the whole mouth piece and bowl every 2 years. The portable uses the mesh and vibration to atomize the medication so the calcium build up will affect its efficiency. I recommend you use a little distilled water to clean out the portable one to get longer life out of them. [I wonder if we could just replace the top pot part on this portable ones.]
I use the time to do deep breathing exercises. It gives me something else to concentrate on instead of the clock. Hope that helps you some.

I have a Battery operated one and you can recharge the batteries and it fits in the palm of your hand it’s great.