Durastar DRUM1824S2A 18-24,000 BTU Multi-Position Air Handler Indoor Unit - R454BDurastar DRUM1824S2A 18,000 24,000 BTU R 454B Multi Position Air Handler Indoor Unit Deliver powerful, adaptable comfort with the Durastar DRUM1824S2A, an 18,00024,000 BTU multi position air handler designed for flexible installation in both residential and light commercial spaces. Flexible, Multi Position Design Measuring 45" x 17 1 2" x 15 5 8", this unit supports both vertical and horizontal installations, providing adaptability for closets,