Rainier Precision, Inc. was founded in Seattle, Washington over 50 years ago.
In 2000, Rainier Precision, Inc. evolved into RP2000, LLC dba/Rainier Precision.
The company is controlled by the family of founder J.W. Trosper and manufactures all the Dri-Z-Air Products  at their Seattle facility. 
Dri-Z-Air is a highly effective chemical dehumidifier, which has been trusted for over 50 years.