Zephyr ZPY-E30 (B,W,S) Use, Care And Installation Manual page 14

TO OBTAIN SERVICE UNDER WARRANTY
or any Service Related Questions, please call:
1-888-880-8368
Have your product proof of purchase with date ready for warranty issues.
Or write to:
Zephyr Corporation
Service and Warranty Department
395 Mendell Street
San Francisco, CA 94124