Quietest vent fan Maxxair or Fantstic?

Air blowing through a screen is difficult to mute. The characteristic of the noise is important. Have you tried a "White Noise" generator? That and a lightweight down blanket worked wonders for my wife when she was sick with cancer and developed near insomnia. Genuine goose down not feathers works best. She chose the waterfall effect. I can say after using one for four months Thinsulate is nowhere near as good as goose down for moderating sleeping temperature. I can sleep comfortably under goose down at 70F. Unless that fan pulls in enough cool air her thermal issues will not be addressed and that means appreciable air volumne ie noise. The head disperses a lot of body heat and a 30 db muffin fan on the night stand on her side would move more air than a person would think. I use a hardware store mechanical dial A/C control for my bedside fan. Easy to make up and worth it's weight in gold. Hope this helps.