Air Conditioner Downflow Low Leak Economizer; Item Downflow Low Leak Economizer; Mounting Type Horizontal; Used On Item 12-1/2 to 25 Ton Packaged Rooftop Air Conditioner with ReliaTel Control; Used On Model/Brand TSD180F to TSD300F/THD150F/THD180 to THD300F/WSD150F to WSD240F/TSD180F to YSD300F/YHD150F/YHD180 to THD300F