Best Practice Guide

Glossary

Introduction

Planning an Energy Program

Funding and Approval

Lighting

Building Envelope

Central HVAC System

Distributed Generation

Demand Response

Commissioning

Procurement Policy

Water Use

Education

Energy Efficiency in Telecommuting

Resources and Appendices

Lessons Learned

Best Practice Guide Glossary

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BRITISH THERMAL UNIT (Btu) Return to list of terms

The standard measure of heat energy. It takes one Btu to raise the temperature of one pound of water by one degree Fahrenheit at sea level. For example, it takes about 2,000 Btus to make a pot of coffee. One Btu is equivalent to 252 calories, 778 foot

Source: California Energy Commission