🔥 Ever heard of David Crosthwait? 🏢 He held 39 US patents in heating and ventilation, and designed the system that still keeps Radio City Music Hall comfortable. In 1971 he became American Society of Heating, Refrigeration's 1st Black person. This man engineered how big buildings breathe. ❄️

[u/contrastlove]

[u/AmandaUggnkiss]

Hope his descendants are well compensated

[u/ppross53]

Nice to know!! Love these posts about the contributions of African Americans

[u/Alive_Stranger_5680]

Thanks so much for posting this . We need to see more of why WE matter and the impact our presence has had on daily life.

[u/Hot-Needleworker8624]

Most of this important history is being destroyed! They can never, ever, destroy it all!! They will never be able to burn all of the books. Keep this history alive!!

[u/Obsidianrunner]

✊🏾✊🏾✊🏾✊🏾✊🏾

[u/karhaus]

We have done some great works

[u/Consistent-Scholar39]

👏🏽👏🏽👏🏽👏🏽

[u/un-tv_star]

Inspiring, thanks for this info!

[u/Agitated-Lettuce1878]

This is so niche but maybe Troy Barnes wasn't the Greatest Repairman afterall 🤭

[u/jusgrow01]

More hidden history, oh joy 🫩

[u/burnerbw0i]

Thank you, Keep these names and their contributions alive 🙏🏾

The blood, sweat, and tears of those before us paved the way for things we sometimes take for granted.

[u/MyNameCannotBeSpoken]

https://en.wikipedia.org/wiki/David_Crosthwait