How to Find Your Air Purifier Model Number

Start with the device, not the old filter

Look for a rating or identification label on the back, bottom, side, or inside the filter cover. The label normally includes the manufacturer, model or model number, electrical information, and sometimes a serial number. You need the model number; the serial number identifies one individual unit and is usually not useful for finding a filter.

If the purifier is difficult to move, use your phone to photograph the entire label. Take a second close photo of the model line. This reduces transcription errors and gives you a reference when comparing retailer listings later.

• Check the back panel and underside first.
• Open the filter door only after unplugging the purifier.
• Copy spaces, hyphens, letters, and suffixes exactly as shown.
• Do not substitute the Wi-Fi name, app name, serial number, or room-size claim for the model number.

Why suffixes matter

Manufacturers may use a suffix to mark a color, sales channel, smart version, production revision, or regional configuration. Sometimes two suffixes share a filter; sometimes they do not. The safe approach is to search the complete label first and accept a shorter family name only when an official source explicitly connects the variants.

For example, a listing that says it fits a base model does not automatically prove that it fits an S, P, Max, Mini, or regional version. Similar names are a reason to verify more carefully, not a reason to assume compatibility.

Cross-check the model in two places

After copying the label, check the owner’s manual, manufacturer support page, or official replacement-filter page. The most useful source is one that names both the purifier model and the replacement-filter part number. A retailer title can help you discover a candidate, but it should not override the device label or an official fitment record.

ENERGY STAR product records can also help distinguish certified US models because they publish model information for listed room air cleaners. They are a useful secondary check, but the manufacturer’s filter documentation should still anchor the final match.

What to do when the label is missing

Search for the manual using the manufacturer name and every exact marking you can find. Compare control-panel layout, intake shape, dimensions, and filter-door design, but treat appearance as supporting evidence only. Closely related models can share the same housing while using different electronics or filters.

If you cannot establish an exact model, contact the manufacturer with photos before buying. A returnable filter is still inconvenient; a forced or poorly sealed filter can also reduce airflow and filtration performance.