Bernie Boyer writes:
"I bought the Aprilaire 600 from Alpine after an extensive search on the Web. I like the information you provide on the site. It made me feel confident that I could install the unit. In less than four hours, with no experience in heating and cooling, I was able to flawlessly install the unit. It works well and I can feel the difference in the house. A local store wanted to charge me over $600 for a lesser-performing unit! I saved over $450 dollars buying and installing it myself. The money not withstanding, it was a great feeling to 'do-it-yourself.'"
Factory original Aprilaire No. 501 fits the Spacegard / Aprilaire 5000 air cleaner. Comes in money-saving 10-pack for reduced product and shipping costs. Manufacturer recommends replacing filter about once a year.