{ "item_title" : "HVAC Technician's Field Guide", "item_author" : [" Blake C. Thornton "], "item_description" : "A practical field reference for residential and light commercial HVAC technicians, covering diagnostics, installation, commissioning, and troubleshooting across major HVAC system types.This guide goes beyond basic troubleshooting checklists to explain the refrigeration, combustion, electrical, and control principles behind accurate diagnosis. It covers split system air conditioners and heat pumps, gas furnaces, ductless mini split and VRF systems, packaged rooftop units, hydronic and boiler systems, along with advanced electrical and control diagnostics.Inside, technicians will find practical guidance on installation standards, load calculations, commissioning procedures, preventive maintenance, and structured diagnostic methods designed to help identify problems efficiently and avoid unnecessary part replacement.A dedicated section examines the changing refrigerant landscape, including the AIM Act phasedown and transition to A2L mildly flammable refrigerants, helping technicians understand important regulatory and field considerations as refrigerant requirements continue to evolve.The book emphasizes practical application throughout. Worked examples use real world pressures, temperatures, electrical measurements, and calculations, while detailed diagrams illustrate refrigerant circuits, control wiring, combustion systems, system components, and diagnostic decision trees.A comprehensive appendix provides pressure temperature charts, wire ampacity tables, calculation references, and a master diagnostic quick reference for fast access when working in the field.Whether you are an experienced technician looking for a dependable reference or an apprentice building practical diagnostic skills, this guide is designed to stay useful beyond the classroom.Keep it on the shelf. Take it to the job. Use it when the diagnosis matters.", "item_img_path" : "https://covers2.booksamillion.com/covers/bam/9/79/819/143/9798191436913_b.jpg", "price_data" : { "retail_price" : "23.50", "online_price" : "23.50", "our_price" : "23.50", "club_price" : "23.50", "savings_pct" : "0", "savings_amt" : "0.00", "club_savings_pct" : "0", "club_savings_amt" : "0.00", "discount_pct" : "10", "store_price" : "" } }

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