Title: 7 Outline
Course: HET 191 HVACR Heat Load > Section: HET 191 HVACR Heat Load

7 Outline

7 Outline

Calculating Cooling Loads

Objective

After studying this week’s assignment, the HVAC learner should be able to:

- Develop an appreciation and the importance of the Manual J
- Understand the different types of issues that can effect heating loads
- Analyze the construction of a home and determine the type of heat gains
- Use charts, tables, and forms to calculate the heat gain of a home

Introduction

Air Conditioning equipment is needed to maintain the temperature in a home in the Spring and Summer. However, the air conditioning system must be sized correctly or there can be major operational issues with the equipment. With this in mind, a technician should use industry standard procedures to match the equipment with the heat gain of the structure. Without knowing the right heating gains, the equipment could be over sized or under sized which will not function correctly during extreme outdoor conditions.

1. Terms
  1. Manual J
  2. Heat Transfer Multiplier (HTM)
  3. Latent Heat Loads
  4. Design Outdoor temperature
  5. Design Indoor temperature
  6. Net Wall Area
  7. Manual J
    1. Manual J Purpose

i.     Industry Standard

1. Tables
2. Forms
3. Charts
4. Design Outdoor Temperature
  1. Solar gain
  2. Design Indoor Temperature
    1. Latent heat loads
    2. Determining the area of:
      1. Net Walls
      2. Floors
      3. Ceilings
      4. Windows
      5. Doors
      6. Determining the HTM of:
        1. Net Walls
        2. Floors
        3. Ceilings