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Mitsubishi Electric’s VRF PWFY Hydronic Heat Exchanger functions in various modes to provide hot water or cooled water. The basic PWFY Hydronic Heat Exchanger Unit is available in two sizes – 36,000 and 72,000 Btu. It also operates in three modes – heating (full temperature range), heating ECO (supply temperature based on outdoor ambient), and anti-freeze (maintains circulation to prevent pipe freeze). The PWFY Hydronic Heat Exchanger Unit can provide hot water from 86ºF to 113°F and cool water from 50°F to 86°F.