Which Enaly room ozonator to buy?

Hi,

I’m on low budget and I want to buy a room ozonator for my bedroom. The room is about 200 square foot. I can afford Enaly and I’ve heard they are OK quality for money. There are 2 low output models:

200CT-12   and   OZX-A200B

Both are 200mg/hr, both have exchangeable plates. I contacted Enaly and was told that the only difference is timer. 200CT-12 can run 15, 30 or 45 min every hour. OZX-A200B can run from 0.5 to 3 min every 5 min. Those of you who have experience with room ozonators: is it more practical to have working in a 5-min cycle or a 1-hour cycle?  Is it OK to have it run for 15 or 30 min straight as 200CT-12 does? It’s it too much ozone? 

Does fan on these make noise?

OZX-A200B also has a remote which I don’t need. Probably OZX-A200B will have shorter life if it runs every 5 min, but that’s not the major issue, as long as cycle is right.

Please, advice.

Thanks!