This article contains the Quick Start Guide for the HC450 Series Shark® Air Purifier 3-in-1 with True HEPA. This supports the following SKUs: HC450, HC452, HC452C and HC455.
On the bottom of your box, you should see the model number near the bar code.
The main body of the vacuum (back of the unit) should have a rating label that features your model number.
Your product's model number is listed on the front cover of your instruction booklet.