Aprilaire 4838 Air Cleaner Control
The Aprilaire 4838 air cleaner control is a device that gives you greater control over your air cleaner. The control allows you to see when the air cleaner is running, and manually configure the air cleaner with a variety of settings. For example, it can automatically cycle the fan periodically to clean the air in your home on days when the heating or cooling system is not running much or at all. It also monitors the fan run time and intelligently tells you when to replace the filter.