Contact Contact 20th Century Air, Inc. (714) 514-9426 Hours of Operation: Open 24 hours 7 days a week. Home of the FREE service call. Weekends, Holidays, and Appointments after 7pm may be subject to minimum charges. We would love to hear from you! Please fill out this form and we will get in touch with you shortly. Name*Phone*Email* How did you find out about us?*GoogleOther Search EngineSocial MediaReferralOtherMessage* This iframe contains the logic required to handle Ajax powered Gravity Forms.