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TRUSTED BY ADDISON, IL HOMEOWNERS

  • Average homeowner rating star icon4.5
    Average homeowner rating
  • Verified reviews icon12
    Verified energy efficiency auditing services reviews

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

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

Serving Addison, 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 ARC Insulation, Inc.
ARC Insulation, Inc.
4.7(
49
)
Home Energy Audit

Serving Addison, IL and surrounding areas

Approved

In business since 1993

Free estimates

Warranties offered

"Jim Clay gave the most comprehensive quote for our insulation project. He suggested a couple of options which thought would help regulate the temperature in our home. He explained everything that ARC insulators would be doing to our home. He told us about rebates that would be credited to our bill because of a blower door pressure test and gas appliance combustion test. He presented a well-written quote. The technician for the tests and the technicians who did the insulation work showed up on time. They explained everything they were doing thoroughly. When the work was done, we did a thorough walk-thru before the techs left. We are satisfied with the work performed. We are satisfied with the money we paid. We would recommend ARC Insulation to anyone seeking recommendations."
My Work.
Our Work
Our Work
Our Work
Our Work

+8

Response time2 days
42 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Regional Plumbing Heating & Air
Regional Plumbing Heating & Air
5.0(
15
)
Energy Audit - For BusinessHome Energy Audit

Serving Addison, IL and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"Excellent. An after hours call to find and fix a leak. Ben the technician was professional and friendly. Rhiannon the office contact kept me informed and everything running smoothly. I would definitely use Regional again and recommend them to others."
16 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Perma-Seal Basement Systems
Perma-Seal Basement Systems
4.4(
1,539
)
Home Energy Audit

Serving Addison, 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 Addison, 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 Millennium Solar Electric Inc
Millennium Solar Electric Inc
4.6(
203
)
Energy Audit - For BusinessHome Energy Audit

Serving Addison, IL and surrounding areas

In business since 1999

Emergency services offered

Credit card accepted

"I found Millennium Solar Electric through an Angie's List offer to have an electrical panel replaced with an upgraded panel with a whole home surge protector where you have to pay for the service in full before scheduling the services. Paying a service provider in full before they do any work is quite the leap of faith and goes against rules of dealing with service providers but it is the only way to take advantage of the offers. In an attempt to protect myself I contacted Millennium prior to making payment. The company did not respond to contact attempts through Angie's List email and chat service. I attempted to contact them several times that way throughout October 2017. I finally got in touch with them on November 1st. They apologized for not responding to my attempts to contact them through Angie's List. November 17th was earliest he could schedule my appointment. The work seemed to go off without much of a hitch. When they finished installing the panel, the workers left without much explanation of what what done. I noticed after they left that one of the breakers was not turned on. It was the breaker connected to the whole home surge protector. I wasn't sure if it was supposed to be on or off so I called the company and had to leave a message. A few days later I finally received a response telling me that the breaker should have indeed been turned on. OK, I thought, not a big deal. A week later I noticed that my outdoor security light was no longer working. It was working prior to the installation of the panel. So again I had to call the company. I called on December 1st, left a message. He called me back, stated that he knew what probably went wrong with the wiring when he reconnected the panel but said that he would me back to schedule a time to come correct the problem. I didn't hear back that day so I called on December 4th, 5th, and 6th. On the 6th I again explained the issue as he didn't seem to remember and we made an appointment for December 11th to correct the problem. So I took off work and waited for him to come correct the issue. Guess what....I didn't hear from him on December 11th. I called and find out what happened and the calls went directly to voice mail. I waited an hour and called again and left a message. That is where our story ends for now. I must not contemplate having another company correct the issue which would mean I would have to sue this company for whatever the amount I am charged to have the light fixed. Between December 11th and December 14th, the owner, Christopher Williams and I had a couple of exchanges via text. I think in the end, Mr. Williams understood my frustration and on December 16th he came out as promised (actually he was early) and corrected the issue with the outdoor security light. Now that my issues are resolved I have a much more favorable view of the company."
New ductwork and sheet metal
Granite countertops and new floors
New cabinet, countertops and floors
panel upgrade
400 amp meter service upgrade

+25

Recommended by90%of homeowners
Avatar for Integrity Heating & Cooling Inc
Integrity Heating & Cooling Inc
4.3(
213
)
Energy Audit - For BusinessHome Energy Audit

Serving Addison, IL and surrounding areas

In business since 1995

Free estimates

Emergency services offered

"Excellent! They came the same day I called. Thoroughly cleaned the blower unit, we have dogs and cats. He also checked the hot water tank as a courtesy. Offered a maintenance program for a small fee, pay ahead for maintenance and call us to remind us when services are due to be done. and they did this! This service was worth every penny! I referred them to the buyers of our house when we moved. Excellent company, I recommend them highly."
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+3

Recommended by86%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

R-value measures an insulation material's thermal resistance, indicating its ability to resist heat transfer. A higher R-value signifies better insulation performance because the material is more effective at slowing heat flow. The R-value depends on the type, thickness, and density of the insulation material, such as fiberglass, foam, or cellulose. Each inch of insulation typically provides an R-value between 3 and 8. There is no single universal R-value; the optimal choice depends on your climate zone. Colder climates require a much higher R-value than warmer ones to maintain energy efficiency, keep the home warm in winter and cool in summer, and manage costs.

Dryers are designed to use as little electricity as possible, but power is still required to run the motor that turns the drum and to heat an element that pumps hot air. Eco devices are available and may lead to cost savings in the long term, but you should run the figures before committing to an eco-friendly device as they are often much more expensive to purchase.

The answer is a resounding yes, as dishwashers save significant water and energy compared to washing dishes by hand. The difference is so drastic in fact that those who use energy-efficient dishwashers can expect savings of over $450 per year. This is because dishwashers use less water, they wash at a higher temperature than a hand rinse, and you don’t need to rinse them after washing. New dishwashers use around 4 gallons per load, whereas washing by hand can use up to 2 gallons per minute.

Blower door tests are measured in a few different ways, but the most popular are air changes per hour (ACH) and cubic feet of air (CFM) moving through the house per hour. A good ACH score is less than 2ACH, but 1ACH is better. This means the house experiences a total air change within 60 minutes (for 1ACH). For 2ACH, there’s a complete change every 30 minutes, and so on. CFM scores are similar in that a lower score means less air change, and therefore less leakage.

To determine the right size generator for your house, you should calculate the total wattage of the appliances and devices you want to power during an outage. List all essential items, note their start-up wattages, and add them together.

Here are some typical wattage requirements for common appliances:

  • Refrigerator: 600 watts

  • Large dehumidifier: 700 watts

  • Large window air conditioner: 1,400 watts

  • Water heater: 3,000 to 4,500 watts

  • Electric furnace: 5,000 to 25,000 watts

A 7,500-watt generator might be sufficient for essentials like a refrigerator, freezer, well pump, and lighting circuits. However, for high-demand items like a water heater or furnace, a whole-home generator is a better choice. A portable generator may be enough if you only need to power a few critical items.

While home square footage can offer a rough estimate, it is not always a reliable indicator. For reference, here are some typical generator sizes based on square footage:

  • 1,000 sq ft: 6–9 kW

  • 1,500 sq ft: 7–10 kW

  • 2,000 sq ft: 10–14 kW

  • 2,500 sq ft: 12–16 kW

  • 3,000 sq ft: 16–20 kW+

For the most accurate sizing, consult a professional who can calculate your home's peak and average power consumption and recommend the optimal generator.

The Addison, 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.