Traditional fillings are a mercury/silver mixture. These are the fillings everyone is used to seeing. On average these fillings will last 10-15 years in an adult, but they can fall out, and need to be replaced. Resin fillings are coloured to match your tooth, and have half the life-span of traditional fillings, however more people are opting to go with this type of filling for both cosmetic and health reasons, over recent concerns about mercury content in traditional silver fillings.
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
No, that isn't true. Most fillings do need to be replaced eventually, but it depends on a lot of things. Just because you have a filling doesn't mean that tooth will always get decay. I personally have had fillings for over ten years and they are still good fillings and I have never had any problems with those teeth.
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.
they never need to be relubricated just replaced
When they are warped or worn beyond legal limits.
Never unless it is damaged.