Chapter 2 — How Air Moves Through the System · 30
Temperature Rise Worked Example
Shows technicians how to turn a single calculation into a structured list of root-cause possibilities rather than a one-off fix.
Stop Guessing: HVAC Airflow Made Simple
By Roberto M. Morales
Miami HVAC contractor · 20+ years in the field
Understand Airflow. Measure It Correctly. Diagnose Problems with Confidence.
Separate airflow problems from guesses using temperature rise, static pressure and the blower performance chart.
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HVAC Professional Books · Field DiagnosticsStop Guessing: HVAC Airflow Made Simple
Understand Airflow. Measure It Correctly. Diagnose Problems with Confidence.
By Roberto M. Morales
A practical field guide that helps HVAC technicians understand airflow, measure system performance correctly, diagnose restrictions, and solve comfort problems with confidence.
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Book price + applicable sales tax. That's all.
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- 455 pages of field-tested material
Watch the book in action
Stop Guessing: HVAC Airflow Made Simple — 360° showcase and interior tour
Full rotation of the printed edition followed by a walk-through of real interior pages.
Written by Roberto M. Morales
20+ years of real HVAC field experience
Step-by-step HVAC diagnostic system
Covers airflow, refrigerant, electrical & compressor
Practical field guide for HVAC technicians
Why this book matters
Real field experience, not recycled theory
Airflow is one of the most misunderstood areas of HVAC diagnostics. Many technicians check refrigerant pressures or replace parts before confirming whether the system is moving the correct amount of air. This book turns airflow into a clear, practical, step-by-step diagnostic process built on more than 20 years of hands-on HVAC field experience — helping technicians understand what the measurements mean, identify restrictions, and determine the real cause of poor system performance.
What readers will learn
Skills you take away
Every item below is covered directly in the book.
Understand HVAC airflow fundamentals
Measure static pressure correctly
Identify airflow restrictions
Evaluate blower performance
Diagnose weak airflow
Understand supply and return problems
Recognize dirty filters, coils, and blocked ducts
Connect airflow problems to comfort and efficiency issues
Avoid common airflow diagnostic mistakes
Use a repeatable field-testing process
Written for
Who this book is for
- HVAC technicians
- HVAC apprentices
- Trade-school students
- Service managers
- HVAC business owners
- Maintenance technicians
- Technicians who want stronger airflow diagnostic skills
- Anyone who wants to stop guessing and diagnose airflow correctly
The printed edition
3D book gallery
Photorealistic studio shots of the printed edition — front cover, 3/4 front, 3/4 back, side profile and top-down. Click any view to enlarge.
Airflow learning path
Foundation → Advanced Volume 1 → Advanced Volume 2
Three books, one progression. Start with the fundamentals, move into advanced field measurements, then finish with complete-system troubleshooting.
Step 1 — FoundationStop Guessing: HVAC Airflow Made SimpleBuild the airflow fundamentals: static pressure, restrictions, blower basics, and a repeatable field-testing process.You are hereStep 2 — Advanced Volume 1Advanced Airflow Diagnostics — Volume 1Advanced field measurements: TESP, CFM per ton, cooling and heating performance, blower motors, and system performance.View this book →Step 3 — Advanced Volume 2Advanced Airflow Diagnostics — Volume 2Compressors, refrigerant diagnostics, superheat and subcooling, decision trees, and complete-system case studies.View this book →
Why HVAC professionals trust this work
Built from the field, written for the field
Every chapter is shaped by real service calls — not classroom theory.
20+ years of real field experience
Written by a working HVAC company owner in Miami — not a lecturer.
Designed from actual service calls
Every diagnostic pattern comes from real jobs on real equipment.
For technicians, apprentices, and beginners
Structured to meet you where you are and take you further.
Practical knowledge you can apply immediately
Clear language, real numbers, and steps you can use on the next call.
Part of a complete learning system
One consistent method used across the full HVAC catalog.
Written for lasting career value
Skills that hold up whether you're new to the trade or building a business.
Reader reviews will appear here once the first approved review is published.
About the author
Roberto M. Morales
Roberto M. Morales is the owner of an HVAC company in Miami and an author with more than 20 years of hands-on experience in the field. His work focuses on turning real service-call knowledge into clear, structured systems that technicians can actually use — on the roof, in the attic, and at the electrical panel.
This book is part of a growing catalog spanning HVAC professional and beginner titles, homeowner guides, romance, artificial intelligence, children's books, and Spanish editions.
FAQ
Frequently asked questions
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Written for hvac technicians, hvac apprentices, trade-school students, service managers, hvac business owners, maintenance technicians, technicians who want stronger airflow diagnostic skills, anyone who wants to stop guessing and diagnose airflow correctly.
This title is classified as All Levels.
English.
Choose your format
Book price + applicable sales tax. That's all.
FREE Standard Shipping — 48 Contiguous U.S. States
No paid membership required. No card processing fees.
Faster shipping, Alaska, Hawaii, Puerto Rico & Canada: optional, paid, shown before payment.
Secure checkout on RobertoMMorales.com. Printed to order and shipped with tracking.
Secure Stripe payment · Arrives damaged, misprinted or wrong? Report within 30 days for a replacement or refund. Policy
Professionally Printed. Carefully Packaged. Delivered with Care.
Seeing Is Believing!
Once airflow checks out, the next step is Stop Guessing: HVAC Electrical Wiring Made Easy for wiring diagrams, thermostats and 24 V controls.
Prefer to study in Spanish? This book is also available as DEJE DE SUPONER: El Flujo de Aire en Sistemas Centrales de Forma Sencilla, the Spanish edition by Roberto M. Morales.
Related HVAC books
More HVAC diagnostic books in this series
Available
The Complete HVAC Troubleshooting System
A complete diagnostic system built on 20+ years of hands-on HVAC experience — engineered to help technicians diagnose faster, stop guessing, and fix it right the first time.
View The Complete HVAC Troubleshooting System AvailableStop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 1
Move beyond basic airflow. Learn how to measure, interpret, and connect the operating numbers that reveal what the complete HVAC system is doing.
View Stop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 1 AvailableStop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 2
Transform measurements into reliable diagnostic decisions. Follow complete-system evidence, identify the true root cause, and verify every repair.
View Stop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 2Continue your HVAC airflow training
Build the rest of your diagnostic system with the companion field guides in the Stop Guessing series.
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The Complete HVAC Troubleshooting System
A complete diagnostic system built on 20+ years of hands-on HVAC experience — engineered to help technicians diagnose faster, stop guessing, and fix it right the first time.
Next bookStop Guessing: HVAC Airflow Made Simple — Advanced Airflow Diagnostics — Volume 1
Move beyond basic airflow. Learn how to measure, interpret, and connect the operating numbers that reveal what the complete HVAC system is doing.