The HVAC Quick Reference Card Set is the essential pocket resource for HVAC professionals and AC service techs, combining years of technical knowledge into a convenient, durable format designed for daily use in the field. These cards function as a portable HVAC diagnostic tool, providing critical information about refrigerant charging and service procedures for air conditioning systems. Whether you're a seasoned technician preparing for your EPA 608 certification, performing HVAC service, or just starting your HVAC career, these reference cards provide instant access to vital information when you need it most - like having an HVAC book in your pocket! The comprehensive set includes essential P/T charts for refrigerant management, troubleshooting checklists for common HVAC issues, preventive maintenance guides, and engineering formulas that eliminate guesswork during installations and repairs. Perfect companion to your HVAC tools kit, these cards help technicians work more efficiently without carrying bulky manuals. Designed by industry experts, this reference tool bridges the gap between theoretical knowledge and practical field application, making it an invaluable resource for anyone working with HVAC systems and equipment.