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Guaranteed Watt Saver Systems, Inc., (GWS) opened its doors in 1977 under the direction of Tracy Bass. Bass is currently the President of the Eastern Region of GWS located in North Carolina. He adapted NASA's radiant barrier to residential home construction to update and refine residential heating, ventilation and air conditioning (HVAC) systems. In 1986, Smart House Consultants, under the direction of new owner Kelly Parker, P.E., joined GWS to develop nationwide dealerships. These dealerships made this technology and knowledge available to homes in any climate region. In 1996, the Western region was established in Oklahoma and Parker became the President of Guaranteed Watt Saver Systems, Inc.

In 1994, Kelly Parker, PE worked with the Environmental Protection Agency (EPA) to develop the first Builder Option Packages (BOPs) for the Energy Star Program. GWS helped pioneer the use of blower door technology in performance testing of homes, which is the cornerstone of the Energy Star Program. GWS became the first provider for the Energy Star Program in the States of Texas and Oklahoma. The company was recognized in 1997 by the Environmental Protection Agency as the first nationwide program for the construction of Energy Star Homes.

GWS, Inc. has evolved into one of the nation's leading firms specializing in Energy Efficiency Engineering and Building Science Consulting. GWS provides building science, engineering and inspections for both Energy Star and the new IRC/IECC Energy Code as well as other National Programs. To support builders in these programs, GWS has also developed one of the most comprehensive and intensive Construction and Sales Training Programs in the country. GWS also provides Marketing and Sales Support including national awards programs and utility incentive program support. The firm currently service markets in Oklahoma, Texas, North Carolina, South Carolina, Florida, Louisiana, New Mexico, Mississippi, Alabama, Michigan and Georgia.

As a result of the firm's constant pursuit of goals and top-quality services provided to our builders, GWS has been the recipient of several national and state awards. In 1993, the firm won the State of Oklahoma Energy Odyssey Award 2001 for residential energy conservation project of the year, the only award given statewide. GWS is the only Provider for the Energy Star Program to be awarded the coveted Partner of the Year award in 2001, 2003 and 2005. GWS also received awards from the EPA for Outstanding Achievement in 2002, 2003 and 2004. GWS also been instrumental in helping builders win four Energy Value Housing Awards from the National Association of Builder


PEOPLE ~ A diversity of educational and professional backgrounds make Guaranteed Watt Saver's staff of specialists uniquely capable of providing solutions for demanding builders and homeowners. We know that our people are our greatest asset; and from building science expertise to residential energy auditing to LEED-level building commissioning, they are ready to make your experience with GWS world-class.


Kelly Parker P.E.



Kelly Parker, P.E., President - Guaranteed Watt Saver Systems, Inc. (GWS) is a Professional Engineer in the states of Alabama, Arkansas, Colorado, Georgia, Kansas, Louisiana, Michigan, Mississippi, New Mexico, North Carolina, Oklahoma, South Carolina and Texas currently. He is a LEED Accredited Professional and a certified HERS rater. He is a member of the RESNET Board of Directors and currently serves as RESNET President. Over the past several years, Kelly has become an active champion of environmentally responsible building practices and has held numerous training sessions on the application of building science principles in everyday construction.

Licensed Professional Engineer
National Society of Professional Engineers
Board of Directors - RESNET
ASHRAE – Senior Member
HERS Certified Rater/Trainer
Adjunct Professor – International Mechanical Code education and instruction
LEED Accredited Professional
LEED Faculty

Rogge Miller





Rogge Miller, CMC, CIEC, Environmental and Building Science Consultant GWS (AmIAQC certified) , is a LEED Accredited Professional, HERS Certified Rater, Certified Residential Energy Plans Examiner/Inspector, Certified Microbial Consultant and has a Master’s Certification for Environments for Living.

HERS Certified Rater
Certified Residential Energy Plans Examiner/Inspector
Council-Certified Microbial Consultant
Council-Certified Indoor Environmental Consultant
Master’s Certification for Environments for Living
LEED Accredited Professional

Daniel J. Ward, P.E.



Dan Ward is a project engineer with Guaranteed Watt Saver Systems, Inc. (GWS); He is a Professional Engineer in the State of Oklahoma, LEED Accredited Professional, and a certified Home Energy Rating System (HERS) Rater for Residential Energy Star Certifications.  Mr. Ward has 17 years experience in the HVAC industry, including applications, product design and development, performance testing, design for manufacturing, product certifications, and warranty and service issue resolution in the commercial HVAC industry.  Currently, Mr. Ward is working on commercial and residential HVAC designs, LEED project management and commercial commissioning.

Licensed Professional Engineer – Oklahoma
HERS Certified Rater
National Society of Professional Engineers
ASHRAE – Senior Member
Society of Manufacturing Engineers
LEED Accredited Professional


GWS continues to be recognized for its efforts in Building Science Technology. We have been awarded by some of the top organizations for our role in energy efficient consultation and construction.
  • 2006 Energy Star Partner of the Year Award
  • 2005 Energy Star Partner of the Year Award, RESNET Innovation Award
  • 2004 EPA Outstanding Achievement Award
  • 2003 Energy Star Partner of the Year Award
  • 2002 EPA Outstanding Achievement Award
  • (4) National Association Home Builders (NAHB) Energy Value Housing Awards (thru 2002)
  • 2001 EPA ENERGY STAR® Partner of the Year Award
  • 1993 - State of Oklahoma Energy 2001 Energy Odyssey Award for residential energy conservation project of the year (the only award given in the state).



Our company and its staff have been certified by some of the most prestigious national organizations in America. They include:



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6444 NW Expressway, Suite 836A, Okla. City, OK 73132.
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