Mark Hassinger provides residential and commercial customers alike with complete sales, service, and installation of high quality heating and air conditioning systems.

Contact Us - oasisair@msn.com 32861 Calle Perfecto, Ste. D San Juan Capistrano California 92675 Phone (949) 489-0881 Fax (949) 489-8360 Let us turn your home or building into an Oasis Oasis Air Conditioning & Heating Established 1990 California State Contractor's License #767272 Featuring: Heating and Cooling Systems Since 1904 Keeping America Comfortable For Over 90 Years The Environmentally ...