ClimateMaster’s vFlow technologies is a part of its Tranquility 22 Two-Stage Compact (TY), Tranquility 22 Digital (TZ), Tranquility 30 Digital (TE) and Tranquility Vertical Stack (TSM) series of units for both residential and commercial applications. vFlow variable water flow technology integrates all major water circulation components directly into the heat pump unit, while also varying water flow to minimize the pump’s energy consumption and improve overall system reliability. It can reduce required water pumping power by 60% to 80%. In addition, it protects the unit against extreme operating conditions, extending the life of the compressor and air coil. ClimateMaster.