Air purification: Why does the air in nice hotels feel so good?

I was out with a friend in a neighboring county and became very tired and sleepy—unable to stay awake. This was partially due to overeating and partially due to ‘sleep debt,’ I reckon.

Afraid to drive home, there was a really nice hotel where I’d stayed in the past. I thought I’d better check in. Falling asleep at the wheel amid Interstate exits and traffic was a very real risk.

But when I went there, my friend and I were discussing room rates—and honestly, the cleanliness of the hotel, the clean, open spaces, that alone felt so good that I felt almost exhilerated.

I didn’t even need to stay at the hotel. I felt good enough after a few minutes of being there that I went on home.

Previously, neither caffeine, nor the air inside Starbucks or Walmart or Target nor even the comfort of my car could revive me. It was the air in that hotel. I drove home in wakeful, relative comfort after half a day of fatigue and sleepiness.

My question is—what do some places do—this must’ve been the air filtration—that makes the air feel so pure, fresh, and clean?

The woman at the front desk knew of nothing but the fact that they keep the AC and 67 degrees f. (though it was not cold in there). But there was something more, obviously,

To avoid making this look like a commercial masking as a question, if you know any commercial product or air filtration system, just send me a PM (private message). Such air to come home to is worth the expence.