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TRUSTED BY DEERFIELD, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon39
    Verified energy efficiency auditing services reviews

Top-Rated Energy efficiency auditors in Deerfield - Updated Nov 2026

Avatar for Daniel Nagel
Daniel Nagel
4.6(
42
)
Energy Audit - For BusinessHome Energy Audit

Serving Deerfield, IL and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Dan did a great job of going through everything very thoroughly with me and pointing out a plan of remedy for the aspects of my home that seemed most significant to least significant. I would recommend him in the future for anyone looking to get an understanding of their home energy performance."
Response time1 day
Recommended by100%of homeowners
Avatar for Regional Plumbing Heating & Air
Regional Plumbing Heating & Air
5.0(
15
)
Energy Audit - For BusinessHome Energy Audit

Serving Deerfield, IL and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"Prompt service with very little advanced notice. Technician removed old flame sensor and installed a new one in about 20 minutes. Pleased with technician and service, and will do business again them again if needed. Owner called to confirm service and sent a text with name and information about the technician before his arrival."
17 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Perma-Seal Basement Systems
Perma-Seal Basement Systems
4.4(
1,540
)
Home Energy Audit

Serving Deerfield, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1979

Free estimates

Emergency services offered

"The gentleman that came to do the electric for my sump pump in the basement was a gentleman did great cleanup great work courteous kind very informative. This was the first step prior to having the drains put in. This was the Electrician and he was excellent."
Thermal imaging
Blower door test
Old insulation removal
New blown insulation
Perma-Seal Attic Insulation

+48

Response time1 day
Response rate100%
47 neighbors recently requested a quote
Goodman Home Inspections, LLC
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Deerfield, IL and surrounding areas

Approved

My name is Darryl Goodman and I am retired from the military after 26 years of successful service. As a home inspector, I bring with me a strong foundation of professionalism, hard work, and a meticulous attention to detail. Leveraging extensive experience in both civilian and military construction, I possess a unique skill set that enhances my ability to assess and ensure the safety and integrity of residential properties.

Avatar for Air Solutions Heating Air-Conditioning Duct Cleaning
Air Solutions Heating Air-Conditioning Duct Cleaning
4.9(
67
)
Energy Audit - For BusinessHome Energy Audit

Serving Deerfield, IL and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"Please Read my entire review: I had another contractor (ABC) come out to my home and told me I needed a blower motor assembly and the cost would be $1500, and was told I should also look into purchasing a new entire unit. after checking this site and seeing that the most I should pay is around $800 and confirming that the part was under $300 I decided to contact another company AIR SOLUTIONS MECHANICAL SERVICES,INC and upon arrival it took Robert approximately 12 minutes to determine that the blower motor assembly was just fine and had no problems at all and had it up and working immediately. He also determined that I had a bad capacitor which is a part I have replaced a handful of times. I really want to thank Robert and thank this company as it truly is an honest and trustworthy company that not only will I recommend to all my friends but to the Angie list community to use for all your air conditioning and heating needs as I will most definitely will be calling them for all of mine. On a side note this happened on the hottest day and week of the year and I was out of town at the time ABC Plumbing Heating Cooling & Electric 220 West Campus Drive Suite 200 Arlington Heights, IL 60004 came out to my home telling me that I needed to spend $1500 and look into purchasing a new unit which would of been as you all know at least $3000. I wanted to make sure the Angie list community was aware of this deceptive company and their deceptive practices. I also contacted them and received a response that they wouldn't pay the $225 I paid to fix the unit but again were willing to make me spend $1500 - $3000 on a repair that was 100% not necessary and not needed. They took full advantage of the weather and me being out of town to be very deceptive. I have ALL the paper work to confirm everything."
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Recommended by98%of homeowners
Avatar for Eco Tec Insulation Inc
Eco Tec Insulation Inc
4.2(
212
)
Energy Audit - For BusinessHome Energy Audit

Serving Deerfield, IL and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"39% drop in energy bill during the winter! Upstairs furnace maybe ran 14 times during winter. Was relieved to hear it kick on just because I knew it was still working. Best home improvement we have done other than putting hydronic heated garage floor in.
"
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+27

Recommended by88%of homeowners
Avatar for AVI Alliance Systems
AVI Alliance Systems
5.0(
7
)
Energy Audit - For BusinessHome Energy Audit

Serving Deerfield, IL and surrounding areas

In business since 2010

Free estimates

Emergency services offered

"After our air conditioner broke on a hot Saturday, the technician arrived extremely fast and was very efficient in repair speed. Could not have asked for a better person to resolve our problem, very nice, understanding and helpful. Would definitely recommend to anyone seeking similar assistance."
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+26

Recommended by100%of homeowners
Showing 1-10 of 29
Energy Efficiency Auditing FAQs, answered by experts

Leaving vents open but closing doors in unused rooms will probably not save money on your energy bill. Closed doors prevent the natural flow of air throughout the home, which could reduce the efficiency of the overall HVAC system. They could also restrict airflow into and through the return vents, making the HVAC system less efficient.

A whole-house humidifier can positively impact energy consumption by improving heating efficiency. During colder months, humidified air feels warmer, which allows you to lower your thermostat without sacrificing comfort. This adjustment can lead to significant energy savings as your heating system works more efficiently. However, it's important to use the humidifier judiciously, as excessive humidity could potentially strain your cooling system in warmer months.

Modern windows provide enhanced UV protection, improved heat retention, and cooling efficiency, contributing to overall household energy savings.

The difference between an energy auditor and a home inspector is primarily in the purpose of the inspection. The energy auditor conducts tests in your home to determine the energy efficiency levels in areas like windows, insulation, and doorways. The auditor then makes recommendations for ways to improve a home’s energy efficiency. 

A home inspector examines various structures of your home to determine that everything is up to code and gauge the condition of features like the roof, foundation, HVAC, and electrical. The home inspector reports on the overall home and makes repair recommendations.

The extra insulation helps reduce energy costs by minimizing drafts and temperature exchange between indoors and outdoors.

The Deerfield, IL homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.