Content Container The 44PH series horizontal packaged heat pump, packages the heat pump in a space efficient configuration for use above ceilings within the space. Models 44PH - Horizontal Water Source Heat Pump Submittals Individual Submittals 44PH • Serenity Horizontal Packaged Water Source Heat Pump with ECM Control Sequence Performance Data Finish IOM Miami-Dade NOA Specifications Catalog Literature Water Source Heat Pumps Water Source Heat Pumps