Many Tappan heating and air conditioning systems require the use of these specialty pleated air filters, known as whole house filters. These are high-efficiency air cleaners that go above and beyond the original duty of an air filter by not only keeping the internal components of your system clean, but also by improving your indoor air quality. Four sizes are available, all in 5-inch. nominal depths which keeps your filter changes down to one or two times each year! If you're having trouble selecting your Tappan replacement whole house air filter, contact us for additional help.