The Aprilaire filter should be changed every 6 to 12 months for optimal performance.
When it is dirty.
When it is dirty.
Change the oil filter every time you change the oil.
I recommend you change it every 75,000 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.
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.
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.
I have found that the filter should be changed around 90K in normal use and 60K in severe conditions. Toyota Tech.
Depending on how much you drive your car should be how often you change your air filter. Sources say you should change it when you go to get your oil changed cause they both last about the same time.
Should be changed every 50,000 miles.
Fridge water filters should typically be changed every 6 months to ensure clean and safe drinking water.
Refrigerator water filters should typically be changed every six months to ensure clean and safe drinking water.