They are replaced when they go bad.
What you meant to ask is how often should the timing belt be replaced! And the answer is every 90,000 miles for b2000 model.Ok
Ammonia is a disinfectant. It is a harsh disinfectant, so should be used only on inanimate objects, and should be rinsed thoroughly after use. It should never be combined with bleach in the cleaning process.
if you want to freeze everything your disinfecting then possibly. Ammonia, a common compound of nitrogen, is often used as a disinfectant.
Trihalomethanes are chemical compounds in which three of the four hydrogen atoms of methane (CH4) are replaced by halogen atoms.Trihalomethanes (THMs) often occur in drinking water as a result of chlorine treatment for disinfectant purposes.
When they wear out.
about every 2 years
The Honeywell filter should be replaced every 8- 12 months or as needed.
Although there is no set on how often your brakes should be replaced, I would just pay attention to your car. When you notice something wrong, I would call your auto body shop.
every 6 months i think
Whenever they get REALLY yucky, or ripped apart.
Eyeglasses should be replaced typically every two years. Eyeglasses can break or if expiration is past then a new examination should be taken to get a new pair.