Over 1200 Professionals and Companies Use IES Products....

and many more ....

Metropolitan Utilities District

Universita' Degli Study Di Napoli, Italy

Air Diffusion Products

Natural Renewable Energy Laboratory

City Gas Company Of Florida

Peoples Natural Gas of Pittsburgh

Columbia Gas Of Ohio, Inc.

Atmos Energy Corp.

Ontario Hydro

EnergyVision

Enron Operations Corp.

Nautica Dehumidifiers

Texas Util. Fuel Co.

Mississippi State University

Municipal Gas Authority of Georgia

Wisconsin Public Service Corp.

Peoples Gas System, Inc.

UGI Utilities

TECO Peoples Gas

EnergyNorth Natural Gas

Northwest Natural Gas Company

SNAM S.P.A.

Vermont Gas Systems, Inc.

U.S. Navy

Public Service Co. Of CO

Citizens Utility of Louisiana

Munters DyrCool

Piedmont Natural Gas Co

FMC Corporation

Carrier Corp.

Honeywell Inc.

Willmut Gas Co.

Citizens Utilities

Hong Kong and China Gas Co.

Atlanta Gas Light

Hope Gas, Inc.

Southern Company Services, Inc.

United Technologies

Oklahoma Natural Gas

Gaz De France

Owatonna Public Utilities.

PNM Gas Services

Laclede Gas Company

Equitable gas Co.

American Gas Association

Poolpak, Inc.

Mississippi Valley Gas Co.

AMTI

York International

Gatley and Associates

Mammouth, Inc.

Dodson Engineering

W.R. Bradley Co.

Gillan and Hartsmann

Desert Aire Corp.

Crispaire

Dumont Refrigeration

Applied Energy Solutions

Industrial Process Equipment

AAON Inc.

Acena Group, LLC

Sycom Enterprises

Trane Co.

Minnegasco

Newcomb, Anderson, Asso.

Duke Solutions

Greenheck Corp.

Innovative Air Products

Lockheed Energy Research

L.G Spielvogel, Inc.

Lincoln Associates

Louisiana Gas Service Company

Engineering department of the Univ. of Mass.

Consolidated Natural gas

Lizardos Engineering Associates

NICOR

Des Champs

Marathon Oil Co.

Arkansas Oklahoma Gas Corp.

Natural Gas Fuel Supply Corp.

Baxter Health Care

Meckler Engineers Group

Columbia Gas of Kentucky

Girard Engineering

Columbia Gas of Ohio

Affiliated Engineers, NW, Inc.

Rise Engineering

Dupont

Vermont Energy

Research Triangle Institute

Michigan Technological University

J. L. Peterson Consulting

Baltimore Air Coil

Valcon, Inc.

Air Tectonics

City of Austin

Pacific Gas and Electric Co.

HMH & Associates

LG&E Enertech

Hope Gas

National Institute of Science and Technology

Lawrence Berkley National Labs.

The University of Houston

H.L. Turner Group

Engelhard Corp.

EMC Engineering

Air Diffusion Products

Process Cooling Systems

YMCA Kowloon, Hong Kong

United Technologies Research center