Where is the 'hang tag'on the XL Professional air purifier?

SOURCE: Oreck XL® Professional

clean your cell. Allso check for broken or loose tungsten wires in cell.

SOURCE: I need Alpine Air XL-15 Air Purifier Repair service

Best bet is to call EcoQuest at 1-800-989-2299 and they can direct you to the closest repair center.
There is also a way to upgrade to a newer model the FreshAir 2.1 getting $100 back for your old XL-15.
To do this go to www.healthylivingia.com or call 1-800-798-6925 and ask for Eric.

SOURCE: I need a manual for the Oreck XL professional air

How do I open the Oreck XL to get the filter out to clean it?

SOURCE: My Alpine Air XL-15 Air Purifier youst to have a

The Classic XL-15 should have 2 individual indicator lights. The 'red' light is the ionizer indicator, and the 'green' light is the ozone level indicator. Both lights should be illuminated, if the unit is operating properly. The red light should be pulsing, and the green light should be dimly lit, and brightened as the output knob is turned up - indicating a higher ozone production. If the green light is not lit, you likely won't smell the ozone. The first thing you should try, is cleaning the filter and glass ozone plate. Unplug the unit and remove the rear air filter. Clean the filter with clean water and allow to COMPLETELY air dry. Removed the glass plate by depressing the lever behind the glass plate, and gently pulling it out. Clean the glass with a half water, half ammonia (or distilled white vinegar, if ammonia not available) and an old toothbrush to clean between the mesh. Dry plate with a hair dryer and re-place plate into unit. Replace dried air filter, making sure the little tab on the bottom is secured into the interlock. Power the unit on and you should see the indicator lights and smell the fresh ozone!

SOURCE: my oreck air purifier xl won't turn on

With the Air 8 Models there is a number of issues from the motor to the power supply to the circuit boards. With these old units it is hard to find parts for them. as oreck no longer manufactures them. but if the parts were availible i would estimate around 100 to fix your power issue