Vax Mach Air filter
These fit
A Type 90 filter kit.
Every version in the "Also covers" list takes the same parts.
Filter kits
Finding the model number
It's worth a look at the rating plate first, because names get reused across generations. Vax puts the rating label on a white or silver sticker on the back of the machine or underneath it. The model number is a mix of letters and numbers such as U84-AL-Pe or UCA1GEV1, and the serial number is 21 digits long.
Source: Vax, 28 Oct 2026
When to change them
Washable filters go back in bone dry or not at all. A damp one smells, and on some machines it can let the motor pull moisture through.
Quick answers
Which filter kits fit the Vax Mach Air?
Type 90, sold by Vax as the Vax Filter Kit (Type 90).