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    Average homeowner rating
  • Verified reviews icon57
    Verified energy efficiency auditing services reviews

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

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

Serving Northbrook, IL and surrounding areas

Approved

In business since 2014

Free estimates

Warranties offered

"Overall working with Dan was a great experience. I had hired Dan to perform an energy audit. I had the attic insulated to R-38, but one room was still rather chilly. I needed the audit to pinpoint the issue. Now I know each area of infiltration and how to address each. Finally, Dan spotted an issue with my hot water heater. I'm especially grateful of this last point. Dan obviously knows his stuff and has the experience to back it up. I highly recommend him for energy audits."
Response time1 day
Recommended by100%of homeowners
Avatar for ARC Insulation, Inc.
ARC Insulation, Inc.
4.7(
49
)
Home Energy Audit

Serving Northbrook, IL and surrounding areas

Approved

In business since 1993

Free estimates

Warranties offered

ARC Insulation, has been insulating homes in the Chicagoland area for over 27 years. Our staff of friendly professional Energy Auditors can assess your home and provide you with a free energy consultation offering the best most cost-effective solutions customized for your home and budget. Our mission is to help our customers make their homes more comfortable, safe and energy efficient. Because every home is unique, ARC Insulation specializes in all types of safe and efficient insulation, Cellulose, Spray Foam and Fiberglass. We also offer services Energy Audits, New Construction Modeling, Energy Consulting and Mold Remediation. \nA home energy upgrade costs less than you think. \n \nStop wasting money and start saving on your home energy costs year-round! \n \nCall ARC Insulation today. \n

My Work.
Our Work
Our Work
Our Work
Our Work

+8

Response time2 days
36 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 Northbrook, IL and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

We are family owned and operated. We service all brands, makes and models. From furnace and water heater repair and replacements, all the way to a leaking kitchen faucet or bathroom toilet. One call REALLY does it all. Faucets, toilets, sinks, drain rodding, water heaters, boilers, furnaces, air conditioners and humidifiers. New construction to radiant heat. You know you called the pros the first time. Licensed, bonded and insured, we offer easy approval and affordable financing as well!

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 Northbrook, IL and surrounding areas

Approved

Super Service Award Winner

In business since 1979

Free estimates

Emergency services offered

"We had a dirt floor crawl space and a concrete floor crawl space in our home. Both spaces were very cold and nasty looking. We wanted a solution that would help us become more energy efficient and at the same time create some additional storage space. We initially met with a Perma Seal consultant who walked us through what could be done. He suggested we start by installing insulation in both spaces-which we did through another vendor-and then Perma Seal would install their vinyl liner into the space. Long story short the liners are great-the spaces are bright, clean and dry and we now have a lot more storage space."
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 Northbrook, 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 Northbrook, IL and surrounding areas

In business since 2006

Free estimates

Emergency services offered

Why the importance of family owned? Why does it matter? It matters because it means we are long term, and we care at a level that is hard for large corporations to understand. We are an HVAC contractor who will be here tomorrow, and the next day. Not a fly-by-night dealer gone when you need us most. \nFamily-owned also ensures you will experience a level of customer service that is unique to family-owned companies. We understand the importance of reliable and efficient air conditioning, heating and indoor air quality products for our own homes and office, and we know that the same is important to you. For this reason we provide our customers with the latest in heating and air conditioning technology - products that we would trust in our own home.

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Recommended by98%of homeowners
Avatar for Flow-Rite Heating & Cooling
Flow-Rite Heating & Cooling
5.0(
7
)
Energy Audit - For BusinessHome Energy Audit

Serving Northbrook, IL and surrounding areas

In business since 2020

Free estimates

Emergency services offered

Up and coming Residential & Commercial HVAC Company. We Service all makes and models. Furnaces, Boilers, Water Heaters, A/C, Rooftop units and more. I've been in the Heating and Cooling business since 2012. I opened my own business in 2020 and named it Flow-Rite Heating & Cooling.

NEW 96% EFFICIENT AMERICAN STANDARD FURNACE
Leaking Water from underneath
Heating & A/C Project
Heating & A/C Project
Heating & A/C Project

+64

Recommended by100%of homeowners
Avatar for Eco Tec Insulation Inc
Eco Tec Insulation Inc
4.2(
212
)
Energy Audit - For BusinessHome Energy Audit

Serving Northbrook, IL and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"The removal and install went as planned, with the 10" of foam completely changing the energy efficiency of my 100 year old house. Unfortunately, there was damage to one of the ceilings as a result of the staff in the attic, but the Eco Tec repaired the damage the next business day. Not only did Eco Tec provide and outstanding value, I was very impressed how it immediately resolved the minor repair and followed up to make sure it was completed to my satisfaction. Special thanks to Stacy in the office and Josh, one of the company owners."
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+27

Recommended by88%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

Depending on the level of audit you choose, a home energy audit will at least include a walk-through of the home to determine visible inefficiencies, but may include testing and a highly detailed inspection and report laying out the home’s inefficiencies and providing recommendations to fix those issues. The audit may also include a review of utility bills and mechanical testing. Consult your home energy auditor about the types of services they provide before hiring.

Common warning signs of an overloaded electrical panel or meter box include frequent circuit breaker tripping, flickering or dimming lights, scorch or burn marks, and a burning scent coming from the panel. A circuit breaker trips as a protective measure to prevent overheating and potential fires. If you observe any of these signs, turn off the affected circuit breaker and move some devices to a different circuit. If the problem persists after turning the breaker back on, you should contact a professional electrician to resolve the issue.

Attic and whole-house fans improve a home's energy efficiency and comfort. They ventilate hot air from the attic, which reduces peak cooling loads, lowers reliance on air conditioning, and decreases indoor temperatures. This improved air circulation and expedited heat exit helps lower cooling costs, balance moisture levels, and enhance overall natural airflow, contributing to the efficient operation of other home equipment.

They’ll use more electricity than the average upright vacuum, but not remarkably more. Most power units plug into a standard 120-volt outlet and don’t have significant power demands. You shouldn’t notice an increase in electricity bills. If you have any specific questions about energy costs, ask your installer as you examine purchase decisions. Larger power units will need more electricity for their suction levels.

Yes, these services often increase home value by preventing moisture-related issues and enhancing the usable space in basements or crawlspaces.

The Northbrook, 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.