---
title: HVAC Basics
description: HVAC basics introduces the fundamental principles of heating, ventilation, and air conditioning systems. Learners will understand heat transfer, airflow dynamics, refrigeration cycles, and how to identify and maintain core components in residential environmental control systems.
category: trades-crafts
subcategory: plumbing-and-hvac
difficulty: beginner, intermediate, advanced
url: /subject/hvac-basics
---

# HVAC Basics

HVAC basics introduces the fundamental principles of heating, ventilation, and air conditioning systems. Learners will understand heat transfer, airflow dynamics, refrigeration cycles, and how to identify and maintain core components in residential environmental control systems.

## Available Resources

2 Books • 2 Courses • 3 Websites

## Websites

### 1. Energy Vanguard

Building-science blog by Allison Bailes covering duct design, Manual J load calculations, air sealing and dehumidification. Readers come away understanding why HVAC systems underperform in real houses and how enclosure choices drive equipment sizing.

**Difficulty:** Beginner | **Price:** Free

**Link:** https://www.energyvanguard.com/blog/

**Tags:** hvac, building-science, duct-design, load-calculation, energy-efficiency

### 2. InspectAPedia HVAC

Free reference encyclopedia of air conditioning and heat pump diagnosis, with photographs, wiring details and step-by-step fault trees. Useful for identifying refrigerant, airflow and control problems on residential equipment before calling a technician.

**Difficulty:** Beginner | **Price:** Free

**Link:** https://inspectapedia.com/aircond/

**Tags:** hvac, air-conditioning, troubleshooting, heat-pumps, reference

### 3. U.S. Department of Energy

Official website of the U.S. Department of Energy, covering federal energy policy, the national laboratories, and programs in renewables, nuclear, fossil energy, grid modernization and efficiency. Readers find authoritative explainers, research news, funding opportunities and consumer guidance on home energy use.

**Difficulty:** Beginner | **Language:** English | **Price:** Free

**Link:** https://energy.gov

**Tags:** energy-policy, renewable-energy, national-laboratories, energy-efficiency, grid-modernization

## Courses

### 1. Introduction to HVAC

Learn HVAC basics! This free course introduces heating, ventilation, and air conditioning systems.

**Difficulty:** Beginner | **Price:** Free

**Link:** https://alison.com/course/introduction-to-hvac

**Tags:** hvac, heating, ventilation, air-conditioning, free-course

### 2. HVAC School Podcasts and Free Training

Learn air conditioning repair with HVAC School! Free training and podcasts from Bryan Orr to boost your HVAC career.

**Difficulty:** Beginner | **Price:** Free

**Link:** https://hvacrschool.com/

**Tags:** hvac, air-conditioning, refrigeration, hvac-training

## Books

### 1. Modern Refrigeration and Air Conditioning

**Author:** Andrew D. Althouse, Carl H. Turnquist, Alfred F. Bracciano

Goodheart-Willcox trade textbook covering refrigeration cycles, refrigerant handling, compressors, controls and system service procedures. Working through it gives apprentices the theory and equipment knowledge needed for installation, diagnosis and EPA certification on residential and commercial systems.

**Difficulty:** Intermediate | **Language:** English | **Price:** Paid

**Link:** https://www.amazon.com/dp/0870063405?tag=edmonddante07-20

**Tags:** books, trades-crafts, plumbing

### 2. HVAC Troubleshooting Guide

**Author:** Rex Miller

McGraw-Hill field manual organized around symptoms in heating, cooling and ventilation equipment, with wiring diagrams and test sequences. Readers finish able to isolate electrical, airflow and refrigerant faults using meters and pressure readings rather than guesswork.

**Difficulty:** Intermediate | **Language:** English | **Price:** Paid

**Link:** https://www.amazon.com/dp/0071604995?tag=edmonddante07-20

**Tags:** books, trades-crafts, plumbing

---

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