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

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

Serving Mchenry, 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 Regional Plumbing Heating & Air
Regional Plumbing Heating & Air
5.0(
15
)
Energy Audit - For BusinessHome Energy Audit

Serving Mchenry, IL and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"I’m extremely satisfied with Regional. We had three sump pumps that needed to be replaced (primary, secondary, and water powered backup). The quote was very reasonable, and they were able to do the work shortly after their initial visit. They replaced everything with Liberty pumps. Justin and Erich did the work and they were very professional. We had them quote out a couple of other items (replacing water heater, etc) and those quotes were also very reasonable. I will definitely hire them for future jobs."
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 Mchenry, 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 Mchenry, 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 AVI Alliance Systems
AVI Alliance Systems
5.0(
7
)
Energy Audit - For BusinessHome Energy Audit

Serving Mchenry, 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
Avatar for Midwest Spray Coatings A Perfect Crawlspace
Midwest Spray Coatings A Perfect Crawlspace
4.7(
193
)
Energy Audit - For BusinessHome Energy Audit

Serving Mchenry, IL and surrounding areas

In business since 1999

Free estimates

Credit card accepted

"Greg, the owner, came out on two occasions to discuss the crawl space and drain tile. He is extremely knowledgeable and experienced in the crawl space industry. We had a few options and he told me about the new spray product he was using. It is this unique seamless liner that is sprayed on after preparing and insulating the area.
His crew was very professional and easy to talk to. We had some scheduling conflicts that were easy to work around and get the job done when we needed it to be finished.
The difference we noticed in the smell in our basement, the effect the insulation and seamless lining had on the air conditioning in our family room (which is above the crawl space) was immediate. We feel cooler air coming through the duct work since it isn't losing energy traveling through a non insulated space anymore and they basement smells and feels normal since the dirt and concrete is now completely covered by the new liner.
That new product is great.
Greg's company also did drain tile work in our basement. It was a different crew than the group who did the crawl space, but they were equally as professional and easy to work with. Rather than break up the job into 3-4 days they stayed late the first day to get everything ready and prepared so they could complete the job quicker. The job was done the next day. The price was very fair and the crew was extremely clean throughout thew whole process.
We now have a water tight, well insulated basement and we couldn't be happier with the results.
I have told several friends about the experience and would recommend them anytime. From Greg down to each of his crew members they really know how to do a good job and work with the customer."
Exposed stone foundation
Foundation repair and insulation
Polyurea Coating
Ineffective fiberglass
Repairs to Foundation - Same Day

+16

Recommended by98%of homeowners
Avatar for Stop Wasting Energy At Home Inc
Stop Wasting Energy At Home Inc
3.5(
10
)
Energy Audit - For BusinessHome Energy Audit

Serving Mchenry, IL and surrounding areas

In business since 2010

"One year later, I still don't notice a difference in my bill. I've not turned my heat down and I'm still spending the same amount of money as I was before the insulation. The workers did come on time to put in the insulation. When I called to ask about the process initially, he seemed knowledgeable & personable. He cleaned up well, too, but I expected a marked difference in my bill. He didn't call back to follow up. I don't feel like it worked for me."
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Recommended by55%of homeowners
Showing 1-10 of 19
Energy Efficiency Auditing FAQs, answered by experts

Smart glass doesn’t use a lot of electricity, and you can expect a standard window to add between $1 and $2 per year to your electric bills. Smart glass is proof that energy-efficient windows work. Although your smart windows may consume a little energy to operate, they can save enough energy to offset the costs. If you’re concerned about the minimal bump to your electricity consumption, you can opt for smart tint, which doesn’t require electricity to work.

Motion-sensor lights use one watt while on standby and five watts while turned on. They’re usually on for one hour over a 24-hour period, bringing the total wattage to about 28 watts per day. LED lights use around 6.5 to 8 watts while on. If you leave an LED light on all night, with night ranging from 10 to 14 hours, you’re looking at using 65 to 112 watts a night. You can minimally cut your wattage in half by switching to a motion-sensor light.

STC (Sound Transmission Class) is a rating that describes how well a building material or assembly blocks airborne sound. A higher STC rating means less noise will pass through the material, providing better sound reduction. This rating system applies to various building components, including windows, doors, flooring, drywall, and insulation.

For context, a typical single-pane window has an STC rating of around 25 (where normal conversations are audible), while a well-sealed, double-pane window can exceed STC 45 (blocking loud speech and most music). It is important to note that for some products, like soundproofing drywall, the STC rating refers to the entire wall system, not just the individual panel.

Additionally, STC ratings are most effective for measuring sound reduction at mid-to-high frequencies, such as human speech, and may not accurately reflect how well a material blocks low-frequency sounds like bass music or thunder. Because of these factors, it is recommended to consult a professional to determine the right STC-rated materials for your specific soundproofing needs.

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, installing an attic fan can help lower your electric bill—particularly if you live in a hot and humid region. By replacing hot and stuffy air with cooler air, these fans help regulate the temperature in your attic and the rest of your home, taking some of the pressure off of your air conditioner.

The Mchenry, 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.