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System Performance: Maximizing Energy Efficiency in Heating and Cooling

System Performance: Maximizing Energy Efficiency...



Green Awareness (Green Mechanical Systems)
Green Awareness

(Green Mechanical Systems)

Duct and Envelope Tightness Verification Manual
Duct and Envelope Tightness Verification Manual

Combustion Analysis & Fuel Efficiency
Combustion Analysis

& Fuel Efficiency


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System Performance: Maximizing Energy Efficiency in Heating and Cooling

The world around us is evolving and the drive to reduce energy consumption is stronger than ever. The increasing demand on dwindling resources has challenged us to find ways of further reducing overall energy consumption. HVAC Systems constitute forty to sixty percent of the total energy consumption in buildings within the United States.

Developed to aide technicians in many proper techniques and procedures used to both verify and optimize performance of HVAC systems

Efficiency ratings such as the Seasonal Energy Efficiency Rating (SEER), Energy Efficiency Rating (EER), Coefficient of Performance (COP) and Annual Fuel Utilization Efficiency (AFUE) have been established to aid the public in identifying the efficiency of new equipment. These ratings allow consumers to accurately compare HVAC systems prior to purchase. These ratings are also used by technicians to determine whether equipment meets or exceeds their stated energy ratings.

The majority of older existing homes and structures have less efficient systems in operation that use more power than today's high efficiency systems. Many factors can lead to a system operating less efficiently than its designed specification. Improper installation, service and maintenance of both new and existing systems and changes to both indoor and outdoor conditions may lead to systems operating less efficiently than their original designed specifications.

The System Performance Verification training and certification series is not intended to be a comprehensive guide to all system performance issues; it was developed to aide technicians in many proper techniques and procedures used to both verify and optimize performance of HVAC systems with specific emphasis placed on:
  • Proper refrigerant charging procedures and net capacity verification
  • Psychrometric fundamentals
  • Combustion efficiency
  • System airflow testing processes



  • Properties of Air

  • The Sensible Heat Factor of Air

  • Airflow Measuring Tools

  • Measuring Airflow

  • Blower Performance Chart

  • Measuring Airflow Using a Pitot Tool Traverse

  • Airflow – Supply Grille/Diffuser

  • Airflow – Return Grille

  • Airßow – Return Filter Grille

  • Calculating Airflow Through a Return Air Grille

  • Temperature Rise Method for Calculating CFM

  • Temperature Rise Method, Electric Strip Heat

  • Fossil Fuel Heating, Temperature Rise Method

  • Electronically Commutated Motor (ECM)

  • What is the Required Airflow Volume?

  • Heating CFM Requirement

  • Cooling CFM Requirement

  • Airflow and Humidity

  • Calculating Indoor Air Flow

  • Airflow worksheets

Critical Charging

  • Evaporator Temperature Split Check

  • Check the Temperature Split Difference Indoors

  • Determine the Net Cooling Capacity of a System

  • Leak Detection

  • Preliminary Checks and Troubleshooting for System Charging

  • Mathematical Conversions

  • Charging Methods

  • Weigh-in Method For Charging

  • Adjustment to Total Charge

  • Heat Pumps

  • Manufacturer’s Charging Charts

  • System Superheat

  • Measuring System Superheat

  • How Much System Superheat?

  • System Superheat Values

  • Subcooling Method

  • Blended Refrigerants

  • Charging with Blended Refrigerants

  • Evacuation/Dehydration

  • Line Sizing

  • Critical Charging Worksheets


  • What is Psychrometrics?

  • Psychrometric Chart

  • Understanding the Lines of the Psychrometric Chart

  • Dry Bulb Temperature

  • Wet Bulb Temperature

  • Relative Humidity

  • Finding Relative Humidity

  • Humidity Ratio/Grains of Moisture

  • Dew Point

  • Enthalpy

  • Specific Volume

  • The Comfort Zone

  • Finding Dew Point

  • Finding Specific Volume

  • Psychrometric Process

  • Process Triangle

  • Sensible Cooling Process

  • Cooling and Dehumidification

  • Data for Cool and Humidify

  • Calculating Grains of Moisture Required to Increase Humidity

  • Sensible Heat Ratio

  • Calculating Mixed Air

  • Psychrometrics Worksheets


  • Combustion Basics

  • Draft

  • Efficiency Optimization

  • Chart Description

  • Verification of Furnace Setup

  • Practice Exercise—Instructions

  • Test Your Knowledge

  • Testing Procedure

  • Manifold Gas Pressure Testing

  • Temperature Rise Testing

  • Gas Meter Timing

  • Temperature Rise Method for Calculating CFM

  • Fossil Fuel Heating, Temperature Rise Method

  • Calculate CFM of a Fossil Fuel Furnace

  • Combustion Worksheets

110 pages
8-1/2 x 11 in.
Copyright 2012


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