Refinancing a rental that's currently under a residential loan

[Aaron Francis]

I bought a double about 8 or 9 years ago (give or take) that was an FHA under my personal name (house hacked and lived there for a number of years). I would like to refi to take advantage of the current abnormally low loan interest rates but wondered if I HAD to go commercial or if I could stick with a traditional residential refi. I'm assuming I would have to go the commercial route since its no longer my primary residence but wanted to ask those of you more experienced on teh subject than I. Thank you in advance for your time in posting a response, I greatly appreciate it.