Air conditioning and heating service for San Gabriel Valley and Los Angeles area. List of services, area covered and contact information. Heating, Air Conditioning, Refrigeration and Ventilation residential, commerical in the San Gabriel Valley. Horizon Service is your Air Conditioning and Heating Specialist serving the greater Los Angeles area and All of the San Gabriel Valley. We service most of Southern California, so don't hesitate to call if you need a repair or replacement. We do new installations too!

Manufactures a wide range of cabinets and furniture for residential and business use.

Services encompass all aspects of engineering and consulting, materials testing and inspection, site investigation and studies, and project/construction management..