Filters

Virtually every LCD projector on the market has at least one filter. Since most DLP projectors have a sealed optical assembly, they usually do not. LCD projectors at some point will require a filter change but these days, frequency is about the same as lamp life replacement. Depending on how many projectors that must be maintained, filter cleaning/replacement could be a logistical and expensive headache. If you have a lot of projectors, frequent filter cleaning can be a labor intensive and expensive chore especially if you are managing 500 projectors spread across 20 schools. In some cases, the filters are designed to last as long, or even longer, than the projector lamps. We have reviewed some projector models that recommended changing its filters every 12,000 hours. In that timeframe you could have change the bulb 3 times.