About Us – We are Chicago area Customers Choice for Home Energy Audits


is a building performance company specializing in residential energy assessments and energy efficiency upgrades throughout Chicago and Cook County.  The company’s services include: energy assessments (home energy audits), air sealing, insulation, duct sealing, windows, hot water heaters, heating and cooling systems and Illinois Home Performance with ENERGY STAR® Certifications.

Green Energy Improvement is a participating contractor with Illinois Home Performance with ENERGY STAR® and Energy Impact Illinois and is qualified to offer rebates through The Peoples Gas and North Shore Gas Natural Gas Savings Programs and the Nicor Gas/ComEd Home Energy Savings Program. Green Energy Improvement is also approved to offer on-bill financing to qualified Nicor customers. The company also participated in the Aurora Energy Saver Program in 2010 and the Chicagoland Air Sealing Pilot Program in 2011.

Green Energy Improvement employs full-time professionals with the following certifications: Building Analyst Professional, Envelope Professional and Whole House Air Leakage Control Installer (WHALCI) by the Building Performance Institute (BPI), Duct & Envelope Tightness Verifier by the Illinois Association of Energy Raters (IAER), lead-safe certified renovator, Illinois Residential Real Estate Appraiser, and licensed and insured general contractor. The company’s diagnostics include blower door, infrared imaging, and CAZ testing for identifying and implementing air sealing and insulation improvements.

Our satisfied customers tell our story best.  Click here to read some of our many Angies Lists Reviews or  click here for hear some of our testimonials.



KENNETH MARX, Director of Audits and Retrofits

Kenneth is a Building Performance Institute (BPI) certified Building Analyst, Envelope and Whole House Air Leakage Control Installer (WHALCI). He is a licensed and insured general contractor and a lead-safe certified renovator. In addition, Kenneth has over 25 years experience as an Illinois Certified Residential Real Estate Appraiser and is also a licensed real estate broker. kmarx@greenenergyimprovement.com
MATT TAHJAMATT TAHJA, Building Analyst and Chicago Office Manager

Matt is a BPI certified Building Analyst and an Illinois Association of Energy Raters (IAER) Duct & Envelope Tightness Verifier. He has also completed the Building Operators Certification (BOC®) program. matt@greenenergyimprovement.com


JEFF ECCLESJEFF ECCLES, Building Analyst and Sales Manager

Jeff is a BPI certified Building Analyst and Envelope Professional . He was a builder with the US Navy Seabees and a commercial sales associate with Lowes. He also has experience as a home loan manager. jeff@greenenergyimprovement.com

Share this!Email this to someoneShare on FacebookShare on LinkedInShare on Google+Pin on PinterestShare on StumbleUponShare on TumblrTweet about this on TwitterPrint this page