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TRUSTED BY OVERLEA, MD HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon30
    Verified energy efficiency auditing services reviews

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

Elysian Energy, LLC
New to Angi
Home Energy Audit

Serving Overlea, MD and surrounding areas

Approved

In business since 2007

Free estimates

Credit card accepted

Elysian Energy, LLC is a locally owned and operated company that values honesty and integrity in all aspects of our business. Our dedicated team of professionals have over 50 years of hands on experience, to provide innovative ideas and suggestions tailored to your projects. Our services are customized to your individual needs, paying close attention to the details of each project that we are involved with. Please feel free to contact us today! \n \n

Response time1 day
Avatar for Home Energy Saving Solutions
Home Energy Saving Solutions
5.0(
92
)
Energy Audit - For BusinessHome Energy Audit

Serving Overlea, MD and surrounding areas

In business since 2010

Warranties offered

Credit card accepted

"Mohammed handled our project—sealing and insulating our attic. He was very knowledgeable about the best way to accomplish the task in an older home such as ours; and he also ensured that our project qualified for relevant energy rebates. He was professional and courteous in answering all our questions and completed the project in one day. We highly recommend HESS and Mohammed El-Goul."
Common air leaks
Thermal image picks up moisture
Common air leaks
Thermal image picks up moisture
Thermal image showing air leakage

+1

Response time2 days
Response rate100%
Recommended by100%of homeowners
Avatar for Home Energy Loss Professionals (HELP)
Home Energy Loss Professionals (HELP)
4.4(
73
)
Energy Audit - For BusinessHome Energy Audit

Serving Overlea, MD and surrounding areas

In business since 2004

Free estimates

Emergency services offered

"The Energy audit crew were punctual. They expected time of the audit was within the time frame that they quoted. I received a overall evaluation and list of things of suggested that would help to improve the overall energy efficiency of my home along with rebates."
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+1

Recommended by87%of homeowners
Avatar for Atlas Home Energy Solutions
Atlas Home Energy Solutions
4.7(
14
)
Energy Audit - For BusinessHome Energy Audit

Serving Overlea, MD and surrounding areas

In business since 2009

Free estimates

Warranties offered

"Atlas Home Energy performed an energy audit in my home, and based on the findings corrected all issues over a four day course. Their workmanship is flawless and their employees are pleasant and courteous. The bulk of their charge was reimbursed by BGE and my energy cost has declined. I recommend them highly"
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+16

Response time3 days
Response rate100%
Recommended by91%of homeowners
Avatar for Smart Energy Pros
Smart Energy Pros
4.3(
19
)
Home Energy Audit

Serving Overlea, MD and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"Brian came out to perform an energy audit on my home. He arrived on time, was respectful of my home and showed me where my insulation was missing with his infrared camera! His report came two days later as promised with a reasonable quote."
Energy Audit-Insulation
Energy Audit-Insulation
Energy Audit-Insulation
Energy Audit-Insulation
Energy Audit-Insulation

+8

Response time8 hrs
Response rate96%
3 neighbors recently requested a quote
Avatar for Renewable Engineered Systems
Renewable Engineered Systems
4.7(
12
)
Energy Audit - For BusinessHome Energy Audit

Serving Overlea, MD and surrounding areas

In business since 1998

Free estimates

Emergency services offered

"Wonderful, it was a very quick and easy process. Brian talked us through it and in no time we had a 3KW system mounted on a frame in the garden and the invertor installed in the basement. Brian talked us through working with our power company to get the system checked and approved and we now get credits from the power company for power we provide to the grid. In addition we are set up to get Solar Renewable Energy Credits (SRECs) payments for providing clean energy. We also got a free Energy Audit which helped locate some problems areas we were able to fix. The system has basically cut our energy costs in half. I have hesitation in recommending them to anyone interested in solar energy."
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+14

Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

Window AC units use a fair amount of electricity, but significantly less than central AC systems. Because they are more energy-efficient for cooling individual rooms or small spaces, their usage is comparatively low. On average, a window AC unit consumes between 500 and 1,400 watts, while a central AC system uses over 3,500 watts—meaning a window unit uses about one-third of the energy. This typically translates to a monthly running cost of $15 to $40, although this can vary depending on external factors.

Leaving vents open but closing doors in unused rooms will probably not save money on your energy bill. Closed doors prevent the natural flow of air throughout the home, which could reduce the efficiency of the overall HVAC system. They could also restrict airflow into and through the return vents, making the HVAC system less efficient.

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.

Typically, a local home energy auditor is responsible for performing energy audits. A home energy auditor will conduct one of three energy audits designed by the American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) to determine the energy efficiency of your home. The auditor often provides analysis that can help guide changes and improvements to your home for better energy efficiency, giving recommendations as necessary.

Services by electricians can quickly get expensive, but there are a few ways you can save money in the process:

  • Bundle multiple jobs done at the same time to save on trip fees or flat fees for individual projects.

  • Get at least three quotes for service to find the best deal.

  • Buy fixtures, switches, outlets, and other materials beforehand to avoid product markup.

  • If you feel comfortable with it, have an apprentice or journeyman complete the work under the supervision of a master electrician. These electricians in training tend to charge less per project.

The Overlea, MD homeowners’ guide to energy efficiency auditing services

From average costs to expert advice, get all the answers you need to get your job done.