Ohio Rev. Code Ann. § 3309.731
(B) A member of the school employees retirement system who has contributions on deposit with, but is no longer contributing to, a uniform retirement system shall, in computing years of service, be given full credit for transferred service credit if a transfer to the school employees retirement system is made under this section. At the request of a member, the uniform system shall transfer to the school employees retirement system the sum of the following:
(C) A member of the school employees retirement system with at least eighteen months of contributing service credit with the school employees retirement system who has received a refund of contributions to a uniform retirement system shall, in computing years of service, be given full credit for transferred service credit if, for each year of service, the school employees retirement system receives the sum of the following: