What type of maintenance is recommended for ductless mini-split heat pumps?

Regular filter cleaning and checking for leaks is essential for maintaining ductless mini-split heat pumps. The filters in the system play a critical role in ensuring air quality and the efficient operation of the heat pump. When filters are clogged with dust and debris, they can restrict airflow, leading to decreased efficiency and increased energy consumption.

Moreover, checking for leaks is important because refrigerant leaks can diminish the system's ability to heat or cool effectively and can also pose environmental concerns. Performing these routine maintenance tasks helps to ensure that the system operates at its optimal performance level, extends the lifespan of the equipment, and can prevent costly repairs down the line.

In contrast, annual system replacement is not a recommended maintenance procedure as it suggests a far too frequent and unnecessary intervention for well-maintained equipment. Monthly refrigerant refilling is also not standard practice; refrigerants should not need topping off if there are no leaks. Weekly outdoor unit washing, while it may benefit overall cleanliness, is not a practical maintenance schedule and could lead to wear or damage if not performed properly.