Share AIChE is proud to offer new member-only car rental discounts form Hertz and Avis. AIChE Emergency Assistance Plus (EA+) An unexpected emergency at home is already stressful enough; but imagine if you were traveling away from home and the unexpected happens. Learn more Car Rental Discounts AIChE has made arrangements for members to save 5 to 15% off regular rates every time they rent a car from Hertz or Avis. To make a reservation online, visit the Avis AIChE Web page. Or call 1-800-331-1212. Don't forget use your AIChE exclusive Avis Worldwide Discount number: A499100. Call 1-800-654-2200 and mention your member number – CDP0015759 – to receive your AIChE discount.