Contents

Introduction

What is a Heat Pump and How Does it Work? Coming to Terms with Heat Pumps

Air-Source Heat Pumps

How Does an Air-Source Heat Pump Work?

Parts of the System

Energy Efficiency Considerations

Other Selection Considerations

Sizing Considerations

Installation Considerations

Operation Considerations

Major Benefits of Air-Source Heat Pumps

Maintenance

Operating Costs

Life Expectancy and Warranties Ground-Source Heat Pumps (Earth-Energy Systems)

How Does an Earth-Energy System Work?

Parts of the System

Energy Efficiency Considerations

Sizing Considerations

Design Considerations

Installation Considerations

Major Benefits of Earth-Energy Systems

Maintenance

Operating Costs

Life Expectancy and Warranties Heating Energy Cost Comparison: Heat Pump and Electric Heating Systems

Factors Affecting Heating Cost Comparisons

Comparison Results Related Equipment

Upgrading the Electrical Service

Supplementary Heating Systems

Conventional Thermostats

Electronic Thermostats

Heat Distribution Systems

Answers to Some Commonly Asked Questions

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