The Cyclovac H215 is one of the best selling family home Central Vacuums in the world. It's a very quiet machine with an extremely powerful motor. The Cyclofilter has been coated with an antimicrobial treatment which prevents the growth of mold, bacteria, allergens, and anything else which might impact air quality. The H215 provides great performance at a great price. The "H" in H215 stands for "hybrid machine" as it can run with or without bags.