The Carrier 25HBB3 is a discontinued heat pump with an efficiency of 13 SEER and 7.7-8.3 HSPF. The unit had a durable scroll compressor and used environmentally sound Puron refrigerant. The system was protected by an internal pressure relief valve, a high pressure switch, a loss of charge switch, and a filter drier. The 25HBB3 offered operating sound levels as low as 72 decibels, and an accessory sound blanket reduced levels to 70 decibels. A WeatherArmor protection package featured a galvanized steel heavy-duty wire coil cabinet with a powder coat finish to protect the unit from weather hazards.
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