Greenhouse Environmental Control Products for the 21st Century.  
Link4 has an advanced line of greenhouse controllers that provides complete monitoring and adjustment of all equipment (heaters, vents, fans, irrigation) regardless of greenhouse size or type. Customized solutions can be created based on each customer's individual needs.

Address:     22725 La Palma Ave. Yorba Linda, CA 92887 Email:    sales@link4corp.com     Contact:   Phone:    714-524-0004   FAX:  714-854-7244