"A borrower could refinance from a conventional loan to an FHA loan, but seldom would it be to. But you’ll find many of the financial requirements are less stringent than those for a non-FHA loan.
What is a Conventional Loan? A conventional loan is a mortgage that is not backed by any Government agency such as the Federal Housing Administration (FHA) or Veterans Administration (VA). Conventional loans meet the lending requirements of Fannie Mae and Freddie Mac, the two largest buyers of mortgage loans in the US.
Conventional Loans are mortgage loans that are not insured by the government ( like FHA, VA, USDA Loans), but they typically meet the lending guidelines that.
Each mortgage options has it benefits and weaknesses that should be considered for your individual loan needs. Lending guidelines are not.