Verified energy efficiency auditing services reviews
Verified Reviews for Energy Efficiency Auditing pros in Union, IL
*The Angi rating for Energy Efficiency Auditing companies in Union, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.
*The HomeAdvisor rating for Energy Efficiency Auditing companies in Union, IL is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.
Last update on February 26, 2026
Tim Z.
5.0
Reviewed in February 2026
My experience was excellent. I have used Illinois Energy before and the results were just as good as the other 2 times I used them in the past
"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."
"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."
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.
A family owned heating and air conditioning company provides high quality work. We specialize in the installation, service, repair, maintenance, and replacement of commercial & residential high-efficiency heating, air-conditioning, humidification. We service all makes and models of residential and light commercial heating & cooling equipment.
"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."
"Overall the company is very good. They did a thorough job. They showed me where the house needed some additional insulation so we actually purchase additional insulation. I felt that they did a good job of doing the job overall and I didn't have any problems at all. There were a couple of scheduling snap through that due to some of their issues and it as a little aggravating because I had to set up time that would be available for them and everything and they weren't quite on time because of that. They could have been communicated a little bit better."
DelVon Hardaway is the professional you are looking for when a home or business energy analysis is required. More and more this is becoming a valuable tool across the country. Everyone needs a current energy audit, so do not hesitate to call DelVon Hardaway for your energy savings analysis.
"An energy audit revealed terrible problems with our home's insulation, and we decided to start with these issues before moving on to other, smaller, projects related to energy conservation. USA Insulation insisted that we would see a change in our home the very day they put in insulation, and I will have to agree that we did see improvements. I returned home to find 2" diameter plugged holes in the siding every 16 or so inches in 2 rows, one on each floor. We let the insulation cure/dry for a day or two before we painted the caps to match the siding color. In the end, we decided to repaint the whole house but only the main color, not the trim. I would suggest anyone with wood siding that has this type of insulation installed, consider the cost and time to paint the house because repainting just those plugs could be noticable if the house color has faded over the years. It is a very small price to pay (money and time) for the benefits we will see. There is a slight odor as the foam cured, but it was not toxic and not displeasant. It lasted about 48 hours before we could no longer notice the smell at all, but majority of the smell vanished in less than 24 hours. While it is too soon to discuss how well this work is saving us money, we did see 2 immediate changes: 1) It is much quieter inside the house now. 2) The upstairs is no longer a heat trap with unbearable heat in each bedroom (home has no central heating or air conditioning). Let me add a 3rd change now that we have experienced a few cold evenings: 3) The house is indeed warmer and retains so much heat when the radiators go on. The radiators did not have to stay on long before the house maintained a good temperature. USA Insulatoin, as part of their energy audit, left us with several suggestions of "do-it-yourself" projects that can provide additional energy savings in addition the major savings we will see from this insulation work.
Energy Efficiency Auditing FAQs, answered by experts
Typically, triple-pane windows made with krypton gas filling are the most energy efficient. A window’s frame, glass, design, and installation all affect its energy efficiency. These windows, in particular, are designed highly effectively in terms of their ability to insulate.
Yes, including optimizing settings and suggesting upgrades if needed.
A good SEER rating for an HVAC system is typically between 15 and 20. However, minimum requirements vary by location; HVAC systems in northern states must have at least a 14 SEER rating, while those in southern states need a minimum of 15. For the highest possible efficiency, look for units with a SEER rating of 21 or higher. It's important to remember that a SEER rating represents the maximum efficiency a unit can achieve, not the level at which it will operate at all times.
Costs depend on the property size, audit complexity, and whether additional testing (e.g., blower door) is included.
When combined with a substantial solar system, if you have enough Powerwalls, you could go off-grid and be energy independent. But remember, you'd need enough Powerwalls to power your whole home continuously because a single Powerwall can’t power large appliances for extended periods. One Powerwall is able to power an average-sized home's emergency circuits, lights, and outlets. To power large appliances, you likely need two or three Powerwalls.
The Union, 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.
Discover the average home energy audit cost, what impacts pricing, and how to save money on your audit. Get transparent, expert-backed cost info for homeowners.
Thinking about scheduling a home energy audit? Learn how to improve energy efficiency, lower your utility bills, and hire the right local pro for the job.