Intertherm A Coil 13 Seer 3 Ton Medallion 921704. Dimensions of A-Coil measure to 19-1/2" x 18-1/4" x 19". Follow manufacturer recommendations for fit/installation information. Features of Intertherm 921704 A Coil 13 Seer 3 Ton Medallion A-Coil 13 Seer...