122 Load Calculations

Individual Course

Enroll Now - $302

122 Load Calculations

(6 Modules / 18 Instructional Hours) Advanced
Written by Phil Rains

Residential load calculations is a method to determine the heating and cooling BTU/H loads of structures prior to installing HVACR systems to meet those loads.

You will need the required text: Air Conditioning Contractors of America (ACCA) Manual J, 8th Abridged Edition (MJ8-AE). This manual provides thorough instructions for estimating heat loss and heat gain for residential structures and helps to simplify complicated procedures that are often used on a variety of home applications. 122 Systems provides instruction for completing load calculations by hand, which is necessary prior to attempting any computerized load program. We focus on following the concepts of MJ8-AE while further simplifying the methodology emphasized in the manual. Students will utilize a “simple” residential structure and follow the steps to calculate both heat loss and heat gain for its location and outdoor design temperatures. This course also covers residential equipment selection focused on the heating and cooling equipment Btu/h loads of a structure.

This course is presented in the following six modules

  • Fundamentals of Load Calculations
  • Heat Loss of a Structure
  • Heat Gain of a Structure
  • Example Heat Loss and Heat Gain Calculation
  • Fundamentals of Equipment Selection
  • Regional Load Calculation Exercises
Textbook Reference

This course requires the ACCA Manual J 8th Edition AE. Click Here.

Recommended Prerequisites: you will want to have a strong working knowledge of HVACR fundamentals prior to enrollment into this advanced course.

This course is recognized for 18 hours of continuing education (CEHs) applicable to NATE re-certification.

Each course purchase allows one year enrollment to complete. Must obtain a 70% or higher to obtain CEU recognition. Course provides you with a Subject Matter Expert (mentor) to assist with questions and all course materials for the duration of the course.

Enroll Now - $302

Need more guidance? Let us help you find the right course.

Contact Us

More Mechanical Courses

A worker in safety gear holds a sheet with “HVAC: Heating, Ventilating, Air Conditioning” written on it. A toolbox and various tools are on the tiled floor nearby, highlighting hands-on skills gained through an HVAC apprenticeship program.
'.get_the_title().'

101 Fundamentals

A person uses metal shears to cut a sheet of metal on a workbench, showing markings and measurements—skills often practiced in an HVAC apprenticeship program. A glove and wooden tool are also nearby.
'.get_the_title().'

103 Basic Sheet Metal

A man in a blue hard hat and uniform uses a blowtorch to solder a copper pipe, holding soldering wire in one hand—an essential skill for HVAC technician training—with tools spread out on the table.
'.get_the_title().'

104 Copper Works

Wood framing and exposed ductwork inside a building under construction, showcasing unfinished walls and insulation panels—ideal for hands-on practice alongside HVAC online training or NATE certification prep.
'.get_the_title().'

106 Building Systems

Three rolled-up blueprints rest atop architectural drawings with technical lines and floor plan layouts in blue ink—ideal visuals for NATE certification prep or an HVAC apprenticeship program.
'.get_the_title().'

110 Blueprints

A person wearing protective gloves and an orange safety jacket adjusts a manifold gauge set, often used in HVAC technician training or NATE certification prep. Tools and red valves are visible on the table in the background.
'.get_the_title().'

121 Air Properties

A smiling worker in a blue uniform and hard hat holds a clipboard and pen, standing in front of industrial machinery—perfectly representing someone ready for HVAC technician training or an EPA 608 certification course.
'.get_the_title().'

122 Load Calculations

Large metal air ducts and pipes in an industrial ceiling, featuring shiny cylindrical and rectangular ductwork for ventilation or HVAC systems—an ideal scene for hands-on HVAC online training or EPA 608 certification course practice.
'.get_the_title().'

123 Air Distribution

Wide aisle in a grocery store with refrigerated shelves on both sides, stocked with dairy products and packaged goods. Two people converse at the end of the aisle, perhaps discussing an HVAC apprenticeship program or online training options.
'.get_the_title().'

141 Refrigeration I

A technician kneels on the floor while servicing an HVAC unit, using gauges and tools to check and adjust the equipment—a scene familiar in HVAC technician training or during an EPA 608 certification course. Colored hoses and wires connect to the open system.
'.get_the_title().'

142 Refrigeration II

Rectangular black DCV Economizer control module by Carrier, model HH63AW001, featuring labeled input/output ports and screw terminals—ideal for HVAC technician training or NATE certification prep with clearly visible certification labels on the front.
'.get_the_title().'

186 Building Automation Systems – Economizers ADEC / DCV

Three people closely examine mechanical equipment. One man with blue papers points at a component while the other man and a woman in blue uniforms watch attentively—demonstrating hands-on learning in an HVAC apprenticeship program.
'.get_the_title().'

201 High Efficiency HVAC Systems Management

Overhead view of industrial air ducts and vents on a ceiling, with pipes and wiring visible against a light background—perfect inspiration for anyone pursuing HVAC technician training. The image is mostly grayscale with clean, geometric lines.
'.get_the_title().'

205 High Efficiency Ventilation Systems

Close-up of an industrial air filter unit featuring four cylindrical metal mesh filters in a metallic frame, connected to a large duct on the left—ideal for HVAC online training visuals or NATE certification prep materials.
'.get_the_title().'

221 Indoor Air Quality Basics

Close-up of a running industrial machine with spinning pulleys, black belts, a red engine component, and a large cooling fan—perfect for illustrating hands-on skills taught in HVAC technician training or an EPA 608 certification course.
'.get_the_title().'

239 Everything About Belts

Several outdoor air conditioning units are installed on a rooftop, positioned in rows next to large white columns and ventilation ducts—an ideal setting for hands-on experience in an HVAC apprenticeship program.
'.get_the_title().'

241 Intro to Cooling Systems

A person wearing gray gloves uses a manifold gauge set to check or service copper pipes connected to HVAC equipment, demonstrating skills that can be sharpened through HVAC online training.
'.get_the_title().'

242 R-410A Refrigerant

A yellow diamond-shaped road sign with the words TROUBLE SHOOTING stands against a bright blue sky, symbolizing challenges faced during EPA 608 certification course or HVAC continuing education online. White clouds and lens flares add a vibrant touch.
'.get_the_title().'

243 Troubleshooting Plus

A tablet on a wooden surface displays a black screen with a white word cloud about hydrocarbons, featuring terms like HYDROCARBON, PENTANE, PROPANE, and COMBUSTION—ideal for HVAC online training or NATE certification prep.
'.get_the_title().'

244 Hydro Carbon Refrigerants

A technician with NATE certification prep uses a digital gauge manifold to check an outdoor air conditioning unit, colorful hoses attached and a brick wall in the background.
'.get_the_title().'

246 Low GWP Refrigerants

Industrial refrigeration unit with insulated, soundproofed walls, visible wiring, compressors, pipes, and valves inside an open metal cabinet—ideal for hands-on HVAC technician training or supplementing HVAC continuing education online.
'.get_the_title().'

446 Introduction to CO2 Refrigerant Systems

Explore Our Online HVAC Certification Programs

All of our courses are taught by industry experts and cover a wide range of topics, from basic HVAC principles to advanced troubleshooting techniques.

6 Week HVAC Program
Apprenticeship Program
Commercial Refrigeration
Building Automation
Chiller Mechanic
NATE Certification
Rack Tech Program
Metasys Tech Program
Boiler Tech Program
Spanish Programs
Rack Program Plus
Mini-Splits Program
Water Treatment

Individual Courses

Our individual courses are taught by industry-leading experts and cover everything from HVAC fundamentals to advanced troubleshooting.

Mechanical
Heating
Electrical
Chillers
Cursos básicos de HVAC en español