Factory original Aprilaire No. 501 fits the Spacegard / Aprilaire 5000 air cleaner. Comes in money-saving 6-pack for reduced product and shipping costs. Manufacturer recommends replacing filter about once a year.
Minimum Efficiency Reporting Value
Rating system created for air filters with a scale that represents the worst case performance of a filter when dealing with particles in the range of 0.3 to 10 micrometers. The scale is from 1-16. The higher the MERV rating the greater the percentage of particles that will be captured.
In 2002 Alpine Home Air Products became the first company to sell heating, air conditioning and indoor air-quality products online. We have proudly served hundreds of thousands of customers, helping them save time and money by buying their products direct.