What are some sources of cross-reference materials for a blower motor?

Many companies that sell blower motors offer cross-reference guides on their website. US Motors and Century both offer online cross-reference guides that are available to the public for free.

To use the US Motors cross reference guide, click on the "cross reference search" tab. This guide is searchable by either part number or keyword. The search results provide the Nidec Catalog Number of the corresponding item, often in the form of a hyperlink to purchase the item.

The Century cross reference guide is searchable by part number or offers a complete listing of manufacturer stock numbers. The website also offers a more advanced search for AC Motors, DC Motors, and Blower Units more specific criteria such as horsepower, rpm and voltage.