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Because it’s a two-stage heat pump' the 4HP18 has the ability to keep you comfortable by controlling temperature and indoor humidity levels. Most of the time' the 4HP18 will heat or cool your home using its lowest' quietest' most energy conscious setting. However' when heating or cooling demands increase' it can switch to its higher setting for greater temperature control in extreme conditions.

• 18 SEER and 9.2 HSPF exceed ENERGY STAR® guidelines and assure you substantial energy savings
• Efficient' two-stage compressor is designed to operate at lower speed most of the time for quieter' money-saving operation
• Dual-Fuel compatibility allows the heat pump to be paired with a matching gas furnace for even greater efficiency
• Quiet Shift™ design allows your heat pump to dissipate natural frost buildup automatically' with little or no noise
• Heavy-duty compressor sound blanket lowers operating noise
• Rigorous run-testing of each unit in our factory helps ensure the most reliable performance in your home