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  • Verified reviews icon62
    Verified energy efficiency auditing services reviews

Find Energy efficiency auditors in Monrovia

Avatar for Home Energy Saving Solutions

Home Energy Saving Solutions

4.97(
88
)
Approved Pro

Home Energy Saving Solutions

4.97(
88
)
Approved Pro
Customers say: True professional
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2010 years of experience

As a Maryland certified Home Performance with Energy Star contractor, we focus on making homes efficient and comfortable. Our energy audits and energy efficiency improvements usually qualify for generous state incentives and rebates through Pepco, BGE, and Potomac Edison. Mo is the owner/operator at Home Energy Saving Solutions. He has a deep depth of knowledge and experience gained from well over 1000 energy audits. Participation in numerous industry groups and conferences further enhance the expertise brought to each home energy audit. We will inspect your entire home as a system and evaluate energy loss and comfort issues using advanced diagnostic equipment. At the conclusion of the audit you will be presented with a comprehensive report detailing all findings and solutions, along with a payback period for repair and retrofit options.

"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."

Janet B on August 2024

As a Maryland certified Home Performance with Energy Star contractor, we focus on making homes efficient and comfortable. Our energy audits and energy efficiency improvements usually qualify for generous state incentives and rebates through Pepco, BGE, and Potomac Edison. Mo is the owner/operator at Home Energy Saving Solutions. He has a deep depth of knowledge and experience gained from well over 1000 energy audits. Participation in numerous industry groups and conferences further enhance the expertise brought to each home energy audit. We will inspect your entire home as a system and evaluate energy loss and comfort issues using advanced diagnostic equipment. At the conclusion of the audit you will be presented with a comprehensive report detailing all findings and solutions, along with a payback period for repair and retrofit options.

"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."

Janet B on August 2024


Avatar for Atlas Home Energy Solutions LLC

Atlas Home Energy Solutions LLC

4.90(
99
)
Approved Pro

Atlas Home Energy Solutions LLC

4.90(
99
)
Approved Pro
Customers say: True professional
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
2009 years of experience

Atlas Home Energy Solutions is committed to providing the highest quality home energy improvements to homeowners interested in reducing their utility bills and improving the comfort of their home year round. Customer Satisfaction is our number one priority and we promise that we can make a real impact in your home in a way that keeps you happy every step of the way.

"Atlas home energy solutions did an outstanding job from start to finish. They were professional, knowledgeable, courteous and easy to work with. All the crew members Ben Mott (was very knowledgeable, did the home energy audit, followed up with competitive quotes, which was adjusted to accommodate my request, offered BGE rebates upfront, patient and friendly to attend my calls and answer all the questions), Zam (Crew leader who did the exhaust fan installation), Tun (Crew leader who did an outstanding job to insulate the attic and basement), David (Crew leader who did duct cleaning and Aeroseal) were phenomenal and did an outstanding job. The end result is a day and night difference before and after the work and my BGE bill last month went down by more than $100 which is a huge cost saver. The HVAC does not run that much these days and the temperature is pretty even across the 30-year townhouse. I highly recommend Atlas home energy solutions for home energy audit and improvements."

Chandra V on April 2024

Atlas Home Energy Solutions is committed to providing the highest quality home energy improvements to homeowners interested in reducing their utility bills and improving the comfort of their home year round. Customer Satisfaction is our number one priority and we promise that we can make a real impact in your home in a way that keeps you happy every step of the way.

"Atlas home energy solutions did an outstanding job from start to finish. They were professional, knowledgeable, courteous and easy to work with. All the crew members Ben Mott (was very knowledgeable, did the home energy audit, followed up with competitive quotes, which was adjusted to accommodate my request, offered BGE rebates upfront, patient and friendly to attend my calls and answer all the questions), Zam (Crew leader who did the exhaust fan installation), Tun (Crew leader who did an outstanding job to insulate the attic and basement), David (Crew leader who did duct cleaning and Aeroseal) were phenomenal and did an outstanding job. The end result is a day and night difference before and after the work and my BGE bill last month went down by more than $100 which is a huge cost saver. The HVAC does not run that much these days and the temperature is pretty even across the 30-year townhouse. I highly recommend Atlas home energy solutions for home energy audit and improvements."

Chandra V on April 2024


Avatar for TriState Home Services

TriState Home Services

4.64(
195
)
Approved Pro

TriState Home Services

4.64(
195
)
Approved Pro
Customers say: Super punctual
1949 years of experience
Free onsite estimate

If you are looking for a HVAC Contractor, a Plumbing Contractor, or an Electrical Contractor to provide you with great service, you've come to the right place. We provide heating services, air conditioning services, plumbing services, and electrical services to our customers in Frederick and the surrounding Counties, the Pan Handle of West Virginia, and Northern Virginia, from our offices located in Frederick MD. With 3 generations of experience in providing heating, air conditioning, plumbing, and electrical services, we are dedicated to providing the best possible products and services for you, and your family.

"Great service very prompt and easy to work with."

Randy W on May 2025

If you are looking for a HVAC Contractor, a Plumbing Contractor, or an Electrical Contractor to provide you with great service, you've come to the right place. We provide heating services, air conditioning services, plumbing services, and electrical services to our customers in Frederick and the surrounding Counties, the Pan Handle of West Virginia, and Northern Virginia, from our offices located in Frederick MD. With 3 generations of experience in providing heating, air conditioning, plumbing, and electrical services, we are dedicated to providing the best possible products and services for you, and your family.

"Great service very prompt and easy to work with."

Randy W on May 2025


Avatar for EDGE Energy

EDGE Energy

4.71(
26
)
Approved Pro

EDGE Energy

4.71(
26
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
2006 years of experience

EDGE Energy is a licensed, insured, and bonded contractor in (DC, VA, and MD) incorporating green building standards during energy-saving installations for home and business owners.
Our special focus is designing and installing projects which decrease utility bills and energy consumption by 25% to well over 100% - even creating homes that are net-positive.
Our Company started in 2006 with 2 employees and has managed to grow substantially over the past 6 years, now employing 24 people in 3 states. The Companys workers have received training under numerous building science, weatherization, and renewable energy system designations.
As a core value to our customer service policy, we assist homeowners with their tax credits, rebates, and grant paperwork - just trying to make going-green easy.

""

Fred B on November 2021

EDGE Energy is a licensed, insured, and bonded contractor in (DC, VA, and MD) incorporating green building standards during energy-saving installations for home and business owners.
Our special focus is designing and installing projects which decrease utility bills and energy consumption by 25% to well over 100% - even creating homes that are net-positive.
Our Company started in 2006 with 2 employees and has managed to grow substantially over the past 6 years, now employing 24 people in 3 states. The Companys workers have received training under numerous building science, weatherization, and renewable energy system designations.
As a core value to our customer service policy, we assist homeowners with their tax credits, rebates, and grant paperwork - just trying to make going-green easy.

""

Fred B on November 2021


Avatar for Glenmont Heating & A/C

Glenmont Heating & A/C

4.62(
65
)
Approved Pro

Glenmont Heating & A/C

4.62(
65
)
Approved Pro
Customers say: Super punctual
1984 years of experience
Free onsite estimate

When Glenmont Heating & Air Conditioning was founded 28 years ago, we had one goal in mind; providing area families, and businesses with solutions that fit their lifestyles and needs, as well as their wallets. If you have any questions about heating and air conditioning maintenance, a new HVAC system, or are looking into installing a more energy efficient system, Glenmont Heating and Air is the solution to your needs.

"Not Recommended for Thermostat Replacement — Unreasonable and Unfair $700 Charge I do not recommend Glenmont Air Conditioning & Heating for thermostat replacement work. I was charged $700 for a simple thermostat replacement, which I believe was unreasonably high and unfair. I was under the impression that the quoted estimate represented the maximum expected cost only if the technician had to perform additional wiring or complex installation work. If you want to install an Ecobee or any other type of thermostat, you can simply YouTube the installation, which provides step-by-step instructions on how to unwire, label, and rewire to the new thermostat. For my installation, I was under the impression that additional wiring might be needed, but it turned out to be a straightforward swap of the old thermostat with a new Ecobee unit, a process that took only about 15 minutes. Despite that, I was still charged the full amount. The Ecobee Premium thermostat itself costs around $250, meaning they charged nearly $500 just for labor, regardless of how simple or quick the installation is. To make matters worse, the installation only comes with a 30-day warranty, which hardly justifies such a high price. I tried to communicate and explain that this charge was unreasonably high and unfair, but they simply said, “It is what it is.” If you’re considering a thermostat installation, I strongly suggest hiring a professional through Thumbtack, where qualified experts can do the same job for under $150 with transparent pricing and good service. I expected fairness, honesty, and reasonable pricing from Glenmont, but unfortunately, that was not my experience."

Soheil R on October 2025

When Glenmont Heating & Air Conditioning was founded 28 years ago, we had one goal in mind; providing area families, and businesses with solutions that fit their lifestyles and needs, as well as their wallets. If you have any questions about heating and air conditioning maintenance, a new HVAC system, or are looking into installing a more energy efficient system, Glenmont Heating and Air is the solution to your needs.

"Not Recommended for Thermostat Replacement — Unreasonable and Unfair $700 Charge I do not recommend Glenmont Air Conditioning & Heating for thermostat replacement work. I was charged $700 for a simple thermostat replacement, which I believe was unreasonably high and unfair. I was under the impression that the quoted estimate represented the maximum expected cost only if the technician had to perform additional wiring or complex installation work. If you want to install an Ecobee or any other type of thermostat, you can simply YouTube the installation, which provides step-by-step instructions on how to unwire, label, and rewire to the new thermostat. For my installation, I was under the impression that additional wiring might be needed, but it turned out to be a straightforward swap of the old thermostat with a new Ecobee unit, a process that took only about 15 minutes. Despite that, I was still charged the full amount. The Ecobee Premium thermostat itself costs around $250, meaning they charged nearly $500 just for labor, regardless of how simple or quick the installation is. To make matters worse, the installation only comes with a 30-day warranty, which hardly justifies such a high price. I tried to communicate and explain that this charge was unreasonably high and unfair, but they simply said, “It is what it is.” If you’re considering a thermostat installation, I strongly suggest hiring a professional through Thumbtack, where qualified experts can do the same job for under $150 with transparent pricing and good service. I expected fairness, honesty, and reasonable pricing from Glenmont, but unfortunately, that was not my experience."

Soheil R on October 2025


Avatar for Atlas Home Energy Solutions

Atlas Home Energy Solutions

4.69(
24
)
Approved Pro

Atlas Home Energy Solutions

4.69(
24
)
Approved Pro
Customers say: True professional
2009 years of experience
Free onsite estimate

At Atlas Home Energy Solutions, we specialize in helping homeowners save money and enjoy a more comfortable living environment. Based in Maryland, we offer expert energy audits, insulation upgrades, duct sealing, and other energy efficiency services tailored to your home's unique needs. Our team works closely with you to identify energy waste, improve home performance, and lower your energy bills—all while ensuring every room in your house stays cozy year-round. Whether it's sealing drafty spaces, upgrading insulation, or enhancing airflow, we’re here to help you save money without sacrificing comfort. Discover how Atlas Home Energy Solutions can make your home more efficient, your energy bills more manageable, and your indoor spaces more enjoyable. Contact us today for expert service and long-lasting results! Services Include: Professional home energy audits Attic and crawl space insulation Aeroseal® duct sealing Energy efficiency upgrades Your Comfort is Our Priority!

"They did a great Job"

Kenneth G on June 2025

At Atlas Home Energy Solutions, we specialize in helping homeowners save money and enjoy a more comfortable living environment. Based in Maryland, we offer expert energy audits, insulation upgrades, duct sealing, and other energy efficiency services tailored to your home's unique needs. Our team works closely with you to identify energy waste, improve home performance, and lower your energy bills—all while ensuring every room in your house stays cozy year-round. Whether it's sealing drafty spaces, upgrading insulation, or enhancing airflow, we’re here to help you save money without sacrificing comfort. Discover how Atlas Home Energy Solutions can make your home more efficient, your energy bills more manageable, and your indoor spaces more enjoyable. Contact us today for expert service and long-lasting results! Services Include: Professional home energy audits Attic and crawl space insulation Aeroseal® duct sealing Energy efficiency upgrades Your Comfort is Our Priority!

"They did a great Job"

Kenneth G on June 2025


F.H. Furr Plumbing Heating & Air Conditioning Inc

4.33(
15
)
Approved Pro

F.H. Furr Plumbing Heating & Air Conditioning Inc

4.33(
15
)
Approved Pro
Customers say: Super punctual
1981 years of experience
Free onsite estimate

Whether you need a repair, preventive maintenance, or replacement, we are your plumbing, heating, and air conditioning service provider in the northern Virginia and surrounding areas. We invite you to give us a call!

"Nice, reliable, and responded immediately."

Ethan Q on January 2025

Whether you need a repair, preventive maintenance, or replacement, we are your plumbing, heating, and air conditioning service provider in the northern Virginia and surrounding areas. We invite you to give us a call!

"Nice, reliable, and responded immediately."

Ethan Q on January 2025


Elysian Energy, LLC

New on AngiNew on Angi
Approved Pro

Elysian Energy, LLC

New on AngiNew on Angi
Approved Pro
2007 years of experience
Free onsite estimate

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!

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!


Avatar for Root Electric

Root Electric

4.96(
592
)

Root Electric

4.96(
592
)
Customers say: True professional
Recommended by 98% of Angi customers
Recommended by 98% of HomeAdvisor customers

At Root Electric it is our honor to offer our customers superior service from the first telephone call to the final payment. Root Electric specializes in working directly with homeowners, business owners and facility managers in electrical construction, upgrades and service. All of our electricians are experienced and well-trained employees of root electric. Additionally, we do not sub-contract to any outside workers or companies for electrical work. Root Electric employs a dedicated sales staff to handle customer's telephone calls and to estimate projects. This insures that all telephone calls are returned in a timely manner and that all projects are accurately priced and scheduled. Additional DBA - William J Root Inc, Rootelectric. Award winning. Additional emails - [email protected], [email protected], [email protected]. Additional contact name - William Bill. Additional phones - (703) 618-5390.

"I had a new electrical line I wanted to run for a display light attached to a grandfather clock in our foyer. I also requested a switch be added to our wall panel by the front door to operate it. The job involved seeking a route for running wire behind the ceiling and drywall from our basement to the first floor of the house. The installation was complicated and obviously required a healthy amount of expertise in all respects. The work was accomplished with a minimal amount of mess (two small holes) and the quad switch panel added by our front door operates flawlessly. During the same visit they also replaced four decorative ceiling light fixtures and repaired a bad electrical outlet to boot. The workers were fast, efficient and friendly (even to my dog). I can't say enough about this company to do this justice. Very satisfied with my decision to give them a call."

Ronald H on September 2020

At Root Electric it is our honor to offer our customers superior service from the first telephone call to the final payment. Root Electric specializes in working directly with homeowners, business owners and facility managers in electrical construction, upgrades and service. All of our electricians are experienced and well-trained employees of root electric. Additionally, we do not sub-contract to any outside workers or companies for electrical work. Root Electric employs a dedicated sales staff to handle customer's telephone calls and to estimate projects. This insures that all telephone calls are returned in a timely manner and that all projects are accurately priced and scheduled. Additional DBA - William J Root Inc, Rootelectric. Award winning. Additional emails - [email protected], [email protected], [email protected]. Additional contact name - William Bill. Additional phones - (703) 618-5390.

"I had a new electrical line I wanted to run for a display light attached to a grandfather clock in our foyer. I also requested a switch be added to our wall panel by the front door to operate it. The job involved seeking a route for running wire behind the ceiling and drywall from our basement to the first floor of the house. The installation was complicated and obviously required a healthy amount of expertise in all respects. The work was accomplished with a minimal amount of mess (two small holes) and the quad switch panel added by our front door operates flawlessly. During the same visit they also replaced four decorative ceiling light fixtures and repaired a bad electrical outlet to boot. The workers were fast, efficient and friendly (even to my dog). I can't say enough about this company to do this justice. Very satisfied with my decision to give them a call."

Ronald H on September 2020


Avatar for Don Hoffacker’s Air Conditioning & Heating

Don Hoffacker’s Air Conditioning & Heating

4.90(
544
)

Don Hoffacker’s Air Conditioning & Heating

4.90(
544
)
Customers say: Super punctual
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers

In the summer of 1977, Don Hoffacker's Air Conditioning & Heating opened its doors to begin providing residents in Montgomery County with quality service and installations of new heating and cooling equipment. The firm seeks to employ only qualified individuals, who are continuously educated and trained on new products arriving on the residential market each year. We pride ourselves as a firm having been recognized time and again by local media, as well as a very prominent consumer organization, as a business providing service and installation procedures which are top rated for both price and quality.

"I was a loyal customer of Hoffacker's for 30 years and had been very satisfied. Unfortunately, my latest experience with the Hoffacker's team was horrible and I won't use their services going forward. The technicians were great. But the pricing ($450 for 40 minutes of service in my home) seemed very high. When I called to request a clarification for the charge, the service manager was rude, disrespectful and did not follow up when he promised to do so. On my third call back to discuss the issue with him, he rudely told me that the company does not want me as a customer and would take me off their customer list. I have never experienced anything like this in any customer service encounter (on any front). Rude. Disrespectful. Horrible customer service. Especially to a loyal, 30 year customer. I won't be giving them business going forward. And would never recommend them to any of my friends."

miriam g on February 2025

In the summer of 1977, Don Hoffacker's Air Conditioning & Heating opened its doors to begin providing residents in Montgomery County with quality service and installations of new heating and cooling equipment. The firm seeks to employ only qualified individuals, who are continuously educated and trained on new products arriving on the residential market each year. We pride ourselves as a firm having been recognized time and again by local media, as well as a very prominent consumer organization, as a business providing service and installation procedures which are top rated for both price and quality.

"I was a loyal customer of Hoffacker's for 30 years and had been very satisfied. Unfortunately, my latest experience with the Hoffacker's team was horrible and I won't use their services going forward. The technicians were great. But the pricing ($450 for 40 minutes of service in my home) seemed very high. When I called to request a clarification for the charge, the service manager was rude, disrespectful and did not follow up when he promised to do so. On my third call back to discuss the issue with him, he rudely told me that the company does not want me as a customer and would take me off their customer list. I have never experienced anything like this in any customer service encounter (on any front). Rude. Disrespectful. Horrible customer service. Especially to a loyal, 30 year customer. I won't be giving them business going forward. And would never recommend them to any of my friends."

miriam g on February 2025

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Energy Efficiency Auditing questions, answered by experts

Home power is measured in kilowatt-hours, commonly expressed as kWh. The average home uses between 800 and 1,000 kWh per month. Peak usage (and highest bills) occurs in the middle of summer and the depths of winter. Keeping on top of your usage during these crucial months will lower your annual average usage considerably. 

Yes, Tesla Powerwalls are worth the upfront costs, as you can recoup your investment within six to eight years. Plus, they provide peace of mind that you'll have power during a power outage, and, depending on the system you install, you can become energy-independent. While they may be more expensive than other solar power systems, they offer higher battery capacity and lifespan.

Energy-efficient windows are judged on their performance according to a few different factors, including heat transfer, air leakage, light transference, and condensation resistance. If you're unsure whether a window is energy-efficient, look for an ENERGY STAR® label from the U.S. Environmental Protection Agency (EPA). If various products, including windows, meet energy-efficiency standards set by the federal government, the EPA issues this label to help consumers identify energy-efficient products.

Heat pumps transfer existing heat instead of generating it, using less energy. Compared to baseboard heaters, they can reduce heating costs by up to 50% and provide efficient cooling, lowering electricity bills and carbon footprint.

Blower door tests are measured in a few different ways, but the most popular are air changes per hour (ACH) and cubic feet of air (CFM) moving through the house per hour. A good ACH score is less than 2ACH, but 1ACH is better. This means the house experiences a total air change within 60 minutes (for 1ACH). For 2ACH, there’s a complete change every 30 minutes, and so on. CFM scores are similar in that a lower score means less air change, and therefore less leakage.

The Monrovia, 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.