Welcome!

Need energy efficiency expertise for your home or building? We provide expert guidance for residential and commercial property owners and managers.

eZing can:

  • Save you energy and reduce utility bills
  • Improve the safety, comfort and durability of your home or building
  • Reduce the environmental impact of your home or building

Our most popular residential services are energy audits for single family homes, condominiums, townhomes and multi-unit walk-up buildings.

eZing was established in 2009 by John Porterfield, a pioneer in building science and Cheryl Pomeroy, an innovator in home inspection services. Our staff includes RESNET (Residential Energy Services Network) certified energy raters, licensed home inspectors, engineers and carpenters. We are committed to delivering solutions with cutting edge building science technology and innovations.

Angie's List Super Service Award Winner

Angie's List Super Service Award in Energy Audit in Chicago

We are an Angie's List 2009 and 2010 Super Service Award Winner!

eZing on TV


Green Economy Chicago Episode 2 Chapter 4 featuring John Porterfield and an overview of an energy audit.

Memberships and accreditations


Proud member of the Green Building Council and it's Chicago chapter Proud member of the Residential Energy Services Network (RESNET) Certified Energy Star Partner Member of the Illinois Association of Energy Raters
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