The life of a pair of orthotics will vary between patients. If the orthotics are for every day use you may expect them to last for a couple of years. However if you are a long distance runner / walker you may find that they wear out more more quickly. Basically, it will depend on the amount of use of a pair of orthotics.
I don't know I'm asking you
The filters are what needs to be replaced most often on the air conditioning units.
It depends on the use, but yes, they have to be replaced periodically.
3 months i think
it depends on the abuse they take
The Honeywell filter should be replaced every 8- 12 months or as needed.
They need replaced when they wear out.
This depends on how much your car is exposed to the elements. In areas with poor weather, it will need to be replaced often.
Credit cards typically expire every 2 to 3 years and need to be replaced with a new card.
they never need to be relubricated just replaced
You need a 4-year bachelor's degree from a college to get to podiatry school. Podiatry school is 4 years long and it is followed by a residency in a hospital for one, two or three years.
When they are warped or worn beyond legal limits.