MRCOOL Central Ducted 30K BTU, 18.5 SEER, Ducted Air Handler and CondenserProduct Overview The 2. 5 Ton 18. 5 SEER MrCool Central Ducted Heat Pump Split System is a well constructed, durable unit made of painted galvanized steel. This will ensure you can rely on this system for years to come. The air handler also features removable filters so you can count on clean, healthy air for you and your family to breathe. In addition, maintaining this heating and cooling system is easier with the self diagnostic panel located on the