Course: HET 191 HVACR Heat Load

Unit 6 Outline

Unit 6 Outline
Unit 6 Outline

Calculation Heating Loads

Objective

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

- Develop an understanding 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 losses
- Use charts, tables, and forms to calculate the heat loss of a home

Introduction

Heating equipment is needed to maintain the temperature in a home in the winter. However, the heating 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 loss of the structure. Without knowing the precise heating losses, the equipment could be over sized or under sized which will not function correctly during extreme outdoor conditions.

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
  8. Manual J Purpose

Industry Standard
1. Tables
2. Forms
3. Charts
4. Design Outdoor Temperature
5. Design Indoor Temperature
6. 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
    4. Windows
    5. Doors
    6. Determining other loads
      1. People
      2. Appliances
      3. Latent Heat Factors
      4. Infiltration
      5. Stack Effect