iiec name

Leading the Transition to Clean Energy

Featured Stories

PEEP2 Success Stories

Under the Promoting Energy Efficiency in the Pacific - Phase 2 (PEEP2) Project, IIEC implemented 34 EE projects following ADB procurement guidelines.. Read more...

NAMA in Mongolia

IIEC completed a project to provide advisory services on Climate Finance in Mongolia. Read more...

Asia Pacific Urban Energy Association (APUEA)

An initiative of IIEC, supported by Euroheat & Power, the Danish Board of District Heating, ADB, and UN Environment.Read more...


Duct testing and repair is one of the most exciting new areas for potentially huge energy savings. Recent studies and pilot programs show that these savings can be realized in southern and northern latitudes... and that the per home savings can be as high as 8-10% of total household energy use, or as much as 10-15% of household electrical use. In short, duct testing and repair represents one of the newest and largest gold mines for residential energy savings.

The recent focus on duct testing and repair is really the brainchild of three independent energy analysts. John Tooley and Neil Moyer of Natural Florida Retrofit had the insight that a tremendous amount of energy is wasted as a result of leaky ducts. They also gained the respect and support of Jim Cummings of the Florida Solar Energy Center who was simultaneously working on the same concept. Fortuitously, the three teamed up and began to champion the cause with the critical financial support of the Florida Energy Office. They found that leaky ducts are a common, if not universal problem in Florida.

This profile, unlike others in The Results Center’s 1992 and 1993 Profile Series, does not focus on any one specific utility, but instead presents brief descriptions of the "founding fathers" of duct testing and repair (the Florida Solar Energy Center and Natural Florida Retrofit), then some of the base concepts involved with duct testing and repair, and then presents the experiences of several utilities to date in this field. These utilities include The City of Lakeland (FL) Electric and Water Utility, Florida Power Corporation, Florida Power and Light, Pacific Gas and Electric, and Duke Power Company.

As alluded to above, repairing leaky ducts bears a great potential for energy savings (both electric and gas and other home heating fuels as well.) But repairing leaky ducts can have significant air quality benefits as well. Often leaky duct returns, which are under negative pressure or a mild vacuum, pull poor quality air from attics, garages, and basements. Tightening these ducts can thus enhance indoor air quality. The flip side of this equation is that by reducing leakage from a home there is a potential to upset delicate pressure balances, and with it the chance of exacerbating safety issues related to appliances that rely on combustion, such as gas hot water heaters. Thus care has to be taken and most utilities perform combustion safety tests before and after their duct repair efforts.

One of the great ironies of this emerging field is that ducts ought to be installed correctly in the first place. If they were, there would be much less need for costly and time-consuming retrofits. PG&E’s new duct testing and insulation program discussed in this profile includes a "High Performance Ducts" component in its residential new construction program. As such, builders can earn incentives for installing and testing duct systems in accordance with requirements set forth by PG&E, obviating the need for later repairs.



This profile was produced by

IIEC Profile

Our Vision & Values

Our Vision & Values

Our vision is to accelerate the promotion of sustainable energy and environmental programs in developing countries and countries in transition.  Our unique values are strived to provide sustainable solutions with proven technical capabilities, implement with wealth of practical and international experience in Asia and Pacific regions. Read more...

Our Niche & Strengths

Our Niche & Strengths

IIEC works on-the-ground, through multi-disciplined staff and partners, with governments and the private sector to implement energy efficiency and renewable energy programs and projects.  Read more...

Our Capabilities

Our Capabilities

Specific services provided by IIEC to its clients include: DSM/EE Implementation & Evaluation; Development & Implementation of EE Standards and Labeling Programs; Renewable Energy Project Planning & Implementation; Clean Energy Finance Design; and Implementation of Energy Efficient Buildings  Read more...

Our Major Clients

Our Major Clients

IIEC’s major clients include the World Bank, the Asian Development Bank (ADB), the United Nations Environment Programme (UNEP) and the United Nations Development Programme (UNDP) etc.  Read more...

Our Offices


IIEC operates through its offices in India, Thailand and Philippines.  Read more...

Our Team

Our Team

IIEC has full time local staff in each of its offices that are well placed to contribute to programs due to their extensive exposure to energy, transport and environmental activities in the region and their understanding of cultural issues relevant to the countries.  Read more...

Our Board

Board of Directors

IIEC’s Board of Directors is comprised of nine members, who are dedicated to providing strategic guidance to the organization as it advances its goal to promote sustainable and efficient energy use in developing nations and economies in transition.  Read more...


IIEC has published e-Notes Newsletters available on-line here. If you want to stay informed about our activities, please email us your contact information at e-notes @iiec.org.