Best Practice Guide

Local Governments

Introduction

Planning an Energy Program

Funding and Approval

Education

Lighting

Central HVAC System

Heating Subsystem

Natural Ventilation and Air Infiltration

Optimization

Condenser/Chilled Water Subsystem

Controls and Load Reduction

Air Handling Subsystem

Procurement Policy

Building Envelope

Demand Response

Distributed Generation

Water Use

Motors

Food Service

Resources and Appendices

Lessons Learned


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La Mesa, City of

London, City of

Pasadena, City of

Redondo Beach

Sacramento, City of

San Francisco, City of


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Central HVAC System

Heating Subsystem

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Although most boilers are gas- or oil-fired (93 percent of the market), those that are electric typically operate at only 65 to 75 percent efficiency.

Consider upgrading to a more energy-efficient system. High-efficiency boilers have up to 90 percent combustion efficiency. The combustion efficiency of a typical boiler or furnace is 75 percent to 80 percent. Older boilers and boilers converted from coal have 60 percent to 70 percent combustion efficiency.


Resources

U.S. Environmental Protection Agency, ENERGY STAR Building Manual: Heating and Cooling System Upgrades.