Cougar Ash Vacuum Cougar Model MU405 If you have ever tried to vacuum out your ashes with a vacuum cleaner only to turn around when you are done to see a cloud of ash hovering around your head then you have come to the right spot. The Cougar Model MU405 is the Cadillac of Ash Vacuums. With its quiet design and powerful motor, this is the vacuum of choice. This vacuum is "the quiet one". WHAT'S INSIDE MAKES ALL THE DIFFERENCE... These vacuums are specifically designed to remove warm to cold ash from wood stoves, pellet stoves, fireplaces and barbecues. There is a definite, simple technique to use for best results.