I have an 70 year old home with a natural gas boiler and cast iron baseboards. I'm looking to put in central air and wondering if anyone knows where i can find the pros and cons of Hi velocity A/C? I had someone come out about putting in duct work but I'd lose a couple of closets and i can't afford to lose the space. I have an attic area and unfinished basement which i'm in the process of finishing. Any guidance would be appreciated.