Best medical chairs according to redditors

Have you considered a stair chair? I used to volunteer for a rescue squad and we frequently used them.

All of this sounds promising. Your family's approach to his care is definitely a factor, and while it's incredibly frustrating for you, my main concern is that you don't internalize and repeat the behavior. There are better approaches that can improve quality of life, but if your parents aren't seeking them out (or worse, pretending the problem doesn't exist), then there isn't that much you can do. Please don't see this as a window into your future. There is a certain amount of autonomy into your trajectory through life; hold onto it and learn from other's mistakes. I'm sorry about the decisions your dad is making; you could try to talk to him about the effect it has on you.

A few comments:

1. I'd definitely suggest checking out some anxiety meds (benzodiazepines). I wouldn't recommend them as a daily solution for anyone young since they're addictive, but since your grandfather is 99, I think it'll be okay :)
   
   
2. Videos on a loop - especially things like Chinese movies or shows from the 1950s or 1960s could be really fantastic. Definitely comforting. Great idea.
   
   Check out geri-chairs. They're like recliners on wheels, so that you can wheel your grandfather around and he can be in the room with you guys: https://www.amazon.com/Drive-Medical-Position-Chair-Recliner/dp/B002VWK2EE/. They also sell additional comfort cushions for extra support: https://www.amazon.com/Geri-Chair-Comfort-Seat-Cushion-Color/dp/B005DLJBK6/. I could understand why he wouldn't want to be alone in his room especially if he was refusing all forms of entertainment (music/tv/movies/podcasts/books on tap/etc).
   
   I think there are quite a few potential paths forward - hopefully we find one that makes things easier for you.

Generally, they'd use an evacuation chair.

Although, if a building doesn't have them or nobody knows how to use them, then they get assisted by other people evacuating or emergency personnel will enter to assist them if they can.

This is also why many offices tell people with some kind of handicap which affects their ability to move around to inform a designated employee. That employee is generally the one that's responsible for maintaining a list of where those people would be located to give to emergency responders.

here's an example of a very basic one.

They also make some that attach to wheelchairs so the person can stay in it on the way down.

There are evacuation chairs that are designed to carry handicapped people down stairs.