FER Coil Kits are now available for order and delivery! These kits are designed to facilitate the combination of American Standard Heating & Air Conditioning and Ameristar FER-compliant condensing furnaces with 4GXC and 4MXC evaporator coils. The MAY*FERCOLKITA kits come with a metal heat shield, installation instructions, and required items for install. Kits are available in each coil cabinet size and must be used when installing a 4GXC or 4MXC with one of the listed furnace families.