One Year Manufacture Warranty. Evergreen motors are not approved to replace existing ECM Variable Speed or X13 motors, should not be used on twinned systems and should not be used on belt drive systems.This motor WILL Not replace an existing OEM ECM motor such as Carrier or Trane. It is not intended to replace premium ECM constant airflow products, such as Eon 2.3, 3.0, and 2.5. Note: Upon initial install motor will wait a few moments before it starts to spin. Flex Mounting Not Recommended. Suggested replacement reference for: 5SME39HXL111, Dayton 5XZV6