I am seeking a U. S. distributor (preferably in the Chicago area)of
products made by a Japanese company named Sieho.  Sieho manufactured a
stainless steel exhaust cover used throughout my townhouse complex and
I need a replacement.

Hello John446,

I believe you mean "Seiho," rather than "Sieho."  Seiho has one
exclusive sales representative in the Chicago area:

AIR PRODUCTS EQUIPMENT COMPANY
Chicago (Elk Grove Village), IL
Phone: (847) 437-5952
Fax: (847) 437-8124
http://www.airproductsequip.com/

Here is the main Seiho site:
http://www.seiho.com/index.html

Please let me know if there is anything else you need, and feel free
to request clarification before rating this answer.

Regards,

Majortom
_____________________
Google Search 
Sieho
Google suggested I search "Seiho" - Google often makes such
suggestions in red at the bottom and top of the page.

The information was prompt, acurate and complete.  I do however feel
stupid for not recognizing that I may have transposed the correct
spelling of the manufacturers name.  Thanks for the assist.