How long will a ductless heat pump last?

How long will a ductless heat pump last?
With proper maintenance and care, a ductless heat pump should perform for 15-20
years. Many of the systems installed during the 1980s are still functioning well today.
If you can smell salt air where you plan to put a heat pump, they won’t last that long
due to the salt corrosion on the outdoor unit.
Q: What kind of maintenance does a ductless heat pump require?
Dust filters should be vacuumed or washed as needed and allergen cartridges
should be washed or replaced according to manufacturers’ recommendations. The
outside unit should be professionally cleaned every year or two, which costs about
the same as having a boiler or furnace cleaned