Which is hilarious because the only thing gatekeeping the homeowner from doing their own HVAC is an EPA 608 cert you can do in like 2 nights in your underwear (

Which is hilarious because the only thing gatekeeping the homeowner from doing their own HVAC is an EPA 608 cert you can do in like 2 nights in your underwear (cost me like $50 and saved me like $10k), after which you can order 200 lbs of whatever toxic refrigerant you want straight to your home. It used to be getting the actual HVAC systems was a problem but with internet you can get everything you need and bypass that whole racket, especially if you use mini splits you don't even have to know how to run ducts.