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TRUSTED BY ELGIN, IL HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon19
    Verified energy efficiency auditing services reviews

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

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

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

Serving Elgin, IL and surrounding areas

Approved

In business since 2001

Free estimates

Emergency services offered

"Prompt service with very little advanced notice. Technician removed old flame sensor and installed a new one in about 20 minutes. Pleased with technician and service, and will do business again them again if needed. Owner called to confirm service and sent a text with name and information about the technician before his arrival."
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 Elgin, 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 Elgin, 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 Elgin, IL and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"Please Read my entire review: I had another contractor (ABC) come out to my home and told me I needed a blower motor assembly and the cost would be $1500, and was told I should also look into purchasing a new entire unit. after checking this site and seeing that the most I should pay is around $800 and confirming that the part was under $300 I decided to contact another company AIR SOLUTIONS MECHANICAL SERVICES,INC and upon arrival it took Robert approximately 12 minutes to determine that the blower motor assembly was just fine and had no problems at all and had it up and working immediately. He also determined that I had a bad capacitor which is a part I have replaced a handful of times. I really want to thank Robert and thank this company as it truly is an honest and trustworthy company that not only will I recommend to all my friends but to the Angie list community to use for all your air conditioning and heating needs as I will most definitely will be calling them for all of mine. On a side note this happened on the hottest day and week of the year and I was out of town at the time ABC Plumbing Heating Cooling & Electric 220 West Campus Drive Suite 200 Arlington Heights, IL 60004 came out to my home telling me that I needed to spend $1500 and look into purchasing a new unit which would of been as you all know at least $3000. I wanted to make sure the Angie list community was aware of this deceptive company and their deceptive practices. I also contacted them and received a response that they wouldn't pay the $225 I paid to fix the unit but again were willing to make me spend $1500 - $3000 on a repair that was 100% not necessary and not needed. They took full advantage of the weather and me being out of town to be very deceptive. I have ALL the paper work to confirm everything."
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Recommended by98%of homeowners
Avatar for R & G Heating and Cooling
R & G Heating and Cooling
5.0(
6
)
Energy Audit - For BusinessHome Energy Audit

Serving Elgin, IL and surrounding areas

In business since 2022

Free estimates

Credit card accepted

"Marco from R & G did an excellent job replacing the water heater at my rental property. I have called him many times for a variety of services at different locations. He is very professional, and I recommend him to anyone looking for HVAC services."
Recommended by100%of homeowners
Avatar for Flow-Rite Heating & Cooling
Flow-Rite Heating & Cooling
5.0(
7
)
Energy Audit - For BusinessHome Energy Audit

Serving Elgin, 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 Elgin, IL and surrounding areas

In business since 2006

Free estimates

Emergency services offered

"39% drop in energy bill during the winter! Upstairs furnace maybe ran 14 times during winter. Was relieved to hear it kick on just because I knew it was still working. Best home improvement we have done other than putting hydronic heated garage floor in.
"
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+27

Recommended by88%of homeowners
Avatar for AVI Alliance Systems
AVI Alliance Systems
5.0(
7
)
Energy Audit - For BusinessHome Energy Audit

Serving Elgin, 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
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Energy Efficiency Auditing FAQs, answered by experts

While many states require all new construction to undergo blower door tests, it’s not a requirement for existing homes. But in both cases, a blower test helps confirm that the contractor has sealed the exterior, that the type of ductwork installed is functioning properly, and that your home is as efficient as possible.

A home energy audit costs about $420 on average, with prices ranging from $100 to $2,250 or more. The final cost depends on factors like your home's size, location, the thoroughness of the audit, and the specific tests performed. A basic Level 1 walk-through inspection typically costs between $150 and $200, while a comprehensive Level 3 audit with detailed testing and a report costs around $900. Homeowners may be able to use the 2022 Inflation Reduction Act’s Energy Efficient Home Improvement credit to cover up to $150 of the audit cost.

Costs for common individual tests include:

  • Blower door test: $350

  • Duct testing: $100

  • HERS test: $375

  • HERS certification: $200

  • Infrared imaging: $200

You can save money on heating oil through a combination of improving home efficiency and smart purchasing strategies.

Home Efficiency and Usage:

  • Improve Insulation: Ensure your home, especially the basement and attic, is well-insulated and sealed against drafts to prevent heat leakage.

  • Manage Your Thermostat: Use a properly calibrated and programmable thermostat. Lower the temperature by a few degrees, particularly when you are away from home or asleep.

Purchasing Strategies:

  • Buy in the Off-Season: Order heating oil during the summer months when prices are generally at their lowest. This strategy is most effective if you have a large primary tank or a separate storage tank to accommodate bulk deliveries.

  • Consider a Delivery Contract: Some companies offer contracts with a set price for the term. This can lead to savings if market prices for oil increase, but you might pay more if prices drop.

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.

After you receive your audit and report, review the findings and determine which of the prescribed changes you want to make to improve your home’s energy efficiency. Start by contacting the type of professionals recommended by the auditor who can help you remedy the issues discovered during the audit. Prioritize the projects by urgency, importance, and budget. Then, gather estimates from several professionals, remembering to verify any necessary licensing and experience information.

The Elgin, 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.