The Aprilaire filter should be changed every 6 to 12 months for optimal performance.
Filter and fluid should be changed A.S.A.P. Y-THINK-Y
When it is dirty.
When it is dirty.
No. If your using regular oil it should be changed along with the filter every 3000 miles. If you are using synthetic oil it should be changed with the filter every 5000 miles.
Pre-filter for what? You posted this question in the Fuel Filter category. So I must assume you mean the pre-filter on the fuel pump. That is changed when the fuel pump is replaced.
Change the oil filter every time you change the oil.
An air purifier's filter should be changed every year, with the pre-filter cleaned or replaced every few months, depending on the conditions that the device operates in. Always follow the manufacturer's instructions.
Many people do recycle these items. You should check your local yellow pages for recycling centers.
The charcoal filter in a fish tank should be changed every 2-4 weeks to maintain water quality and keep the tank clean for the fish.
Each air conditioner take a different size of filter. The air filter should be checked routinely and changed as needed.
location of fuel filter 03 cts cadillac