
Serving Waterloo, IL and surrounding areas
In business since 1954
Free estimates
Emergency services offered
"Real good. Then later I had this company install a new furnace. It was an emergency and they were right on it. Good company to hire ."





+6

*The Angi rating for Energy Efficiency Auditing companies in Waterloo, 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 Waterloo, 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

Serving Waterloo, IL and surrounding areas
In business since 1954
Free estimates
Emergency services offered
"Real good. Then later I had this company install a new furnace. It was an emergency and they were right on it. Good company to hire ."





+6
Serving Waterloo, IL and surrounding areas
In business since 1978
"Paul Peterson is a knowledgeable and friendly guy.? Arrived at my house 15 min. prior to apt time.? Paul reviewed the areas I thought were the worst, and showed me leaks in the house I would never have thought of.? I was not surprised at the outcome of the energy audit, but I was surprised by the price.? It was less than I thought it would've been."

Serving Waterloo, IL and surrounding areas
In business since 2011
Free estimates
Warranties offered
"Other energy-saving work was also done in attic and crawl space and we are happy with all of it."





+3

Serving Waterloo, IL and surrounding areas
In business since 2022
Free estimates
Credit card accepted
We provide residential and commercial solar power options, and provide support services for industry partner companies. We offer no cost consultations and $0 down financing. Please contact our office for a consultation at (931)922-8258.





+3

Serving Waterloo, IL and surrounding areas
In business since 1971
Emergency services offered
Credit card accepted
"My experience with the Spengler Company was great. Colby arrived at my house on time and then proceeded to perform the cleaning of my air conditioning unit. He found that our refrigerant was low so he filled that up. And he also changed our air filter for FREE! He then gave me six options to replace the water heater in our home. It was over 20 years old and had been leaking on the floor. We selected the second option and he called it in and our water heater was changed out the same day! WOW. What service! We couldn't be happier.
"
Serving Waterloo, IL and surrounding areas
In business since 2009
Free estimates
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.
Serving Waterloo, IL and surrounding areas
In business since 2021
Free estimates
Credit card accepted
"Excellent service. I recently got referred to this fresh group of energetic workers, and I couldn’t have made a better decision than hiring them."




Serving Waterloo, IL and surrounding areas
In business since 2011
Free estimates
We are one of the largest energy consulting companies in the country. We offer Free Energy Forcasts to businesses across a wide variety of climate zones. When implemented, our recommendations can consistently save you 17-22% on your energy costs, in the first year. We offer a variety of products, from an all-inclusive fixed product, to a variable option and a hybrid. Call today to see what solutions we can offer you! References are available from very happy clients.
Serving Waterloo, IL and surrounding areas
In business since 1990
Emergency services offered
Credit card accepted
"Excellent. Eddie Givens, the owner of the company, personally fixed our AC unit. All of his HVAC technicians were working today. Eddie offers a wealth of services. We plan to next use him for an electrical project and replacing our current HVAC contractor with twice annual check ups. We strongly recommend Eddie Givens"
Serving Waterloo, IL and surrounding areas
In business since 2009
Free estimates
Emergency services offered
Fitzgerald Electrical Services is an obvious choice for all your electrical needs. We have the power to perform and can handle any job from computer networking to electrical wiring and panel upgrades for a remodel or addition. We are experts in the installation of in-ground pools and can also assist with repair work associated with your swimming pool and the accessories and equipment. Free Estimates within 30 min drive We proudly obtain a Cape Gerardo License #852, expires March/2014. Outdoor lighting, home theater systems, telephone jacks, surveillance systems, etc..."If There is Wire to It...We Do It".





+15
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.

Get a detailed breakdown of thermal imaging home inspection costs, including average prices, cost factors, and tips to help homeowners budget.

Discover the energy-efficient window costs. Learn about installation prices, cost factors, and tips to save money on your window upgrade.

Wondering what an energy audit is and how it can help keep you safe? Keep reading to learn about home energy audits and how they can save you money.

A home energy audit is a detailed write-up of how to lower your utility bills and increase your comfort level. Find out if they’re worth the cost.

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.