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  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon11
    Verified energy efficiency auditing services reviews

Find Energy efficiency auditors in Lothian

Avatar for GAC Services

GAC Services

227 E Deer Park Dr
4.80(
279
)
Approved Pro

GAC Services

227 E Deer Park Dr
4.80(
279
)
Approved Pro
Customers say: Quick response
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
639 local quotes requested

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"Highly professional, knowledgeable and well behaved technician. Prices offered were good too. I definitely recommend the company."

Deepak K on February 2025

GAC Services is a residential cooling, heating, and electrical contractor setting new standards in the Maryland HVAC and electric market. Since 1970, we’ve developed a strong reputation for providing the Montgomery County and Frederick County areas with reliable cooling and heating services. In 2014, we expanded our service offerings to include electrical services—allowing us to offer our customers the same great service in a new area of business. Additional DBA: Gaithersburg Heating & Cooling

"Highly professional, knowledgeable and well behaved technician. Prices offered were good too. I definitely recommend the company."

Deepak K on February 2025


Avatar for JDL HVAC & Plumbing Services

JDL HVAC & Plumbing Services

14300 Cherry Lane
4.50(
113
)
Approved Pro

JDL HVAC & Plumbing Services

14300 Cherry Lane
4.50(
113
)
Approved Pro
Customers say: Super punctual
145 local quotes requested
13 years of experience

JDL HVAC & Plumbing Services LLC offers a wide range of services to meet your HVAC & Plumbing needs. ​ With offices in both Maryland & Virginia, we serve both residential and commercial clients and specialize in offering a variety of money-saving solutions. Combined with our use of the highest quality parts and equipment and our dedication to delivering exceptional service, we have become known as the HVAC & Plumbing contractor of choice in the DMV area! The mission of JDL is to provide honest, reliable service that stands head and shoulders above the rest. We continually strive to exceed expectations by ensuring that each client receives the very best service from our friendly and knowledgeable HVAC/Plumbing service technicians. No matter what you need you can rely on JDL to provide an unparalleled knowledge, experience and expertise!

"They did a good job"

Richard T on June 2024

JDL HVAC & Plumbing Services LLC offers a wide range of services to meet your HVAC & Plumbing needs. ​ With offices in both Maryland & Virginia, we serve both residential and commercial clients and specialize in offering a variety of money-saving solutions. Combined with our use of the highest quality parts and equipment and our dedication to delivering exceptional service, we have become known as the HVAC & Plumbing contractor of choice in the DMV area! The mission of JDL is to provide honest, reliable service that stands head and shoulders above the rest. We continually strive to exceed expectations by ensuring that each client receives the very best service from our friendly and knowledgeable HVAC/Plumbing service technicians. No matter what you need you can rely on JDL to provide an unparalleled knowledge, experience and expertise!

"They did a good job"

Richard T on June 2024


Avatar for Cyprus Air Heating, Cooling and Fireplaces

Cyprus Air Heating, Cooling and Fireplaces

7525 Richmond Hwy
4.06(
491
)
Approved Pro

Cyprus Air Heating, Cooling and Fireplaces

7525 Richmond Hwy
4.06(
491
)
Approved Pro
Customers say: Quality work
18 local quotes requested
58 years of experience

FREE IN-HOME ESTIMATES | GET A FREE AIR CONDITIONER Cyprus Air Heating & Cooling is your single resource for all your home comfort needs, from tailoring your ideal comfort system to installation, service and beyond. Cyprus Air installs and repairs a variety of Heating & Cooling equipment. With over 56 years of experience in the business, we also offer other home improvement and indoor comfort services such as Gas Fireplaces & Gas logs, and Duct Cleaning. With so many years of design, and installations in Northern Virginia, DC and Maryland, Cyprus Air offers its service oriented expertise and reliability to ensure the high quality standards that architects, engineers, and homeowners have come to rely on from one of the industry leaders.

"I called to get an inspection done on my AC unit and was quoted $90 for the inspection plus $120 an hr for ADDITIONAL hrs. I ASKED when do I know when the “additional hrs start”, He stated that the tech would let me know once the inspection was done and then at that time he would let me know if there was work that needed to be fixed or if there was nothing then the service would end and I would only have to pay the $90. They charged me $210 for the inspection. I called and requested that we both listen to the call (Because all calls are recorded) They played the call, heard what the rep said and then stated they would get back to me. When I finally reached them again (they never called me back), they stated I would not get a refund, then replayed the call cutting out the part when the rep stated clearly that the service was only $90. They not only GASLIGHTED me, but they altered the recording. $120 may not matter to most but it sure matters to me."

Kay H on June 2025

FREE IN-HOME ESTIMATES | GET A FREE AIR CONDITIONER Cyprus Air Heating & Cooling is your single resource for all your home comfort needs, from tailoring your ideal comfort system to installation, service and beyond. Cyprus Air installs and repairs a variety of Heating & Cooling equipment. With over 56 years of experience in the business, we also offer other home improvement and indoor comfort services such as Gas Fireplaces & Gas logs, and Duct Cleaning. With so many years of design, and installations in Northern Virginia, DC and Maryland, Cyprus Air offers its service oriented expertise and reliability to ensure the high quality standards that architects, engineers, and homeowners have come to rely on from one of the industry leaders.

"I called to get an inspection done on my AC unit and was quoted $90 for the inspection plus $120 an hr for ADDITIONAL hrs. I ASKED when do I know when the “additional hrs start”, He stated that the tech would let me know once the inspection was done and then at that time he would let me know if there was work that needed to be fixed or if there was nothing then the service would end and I would only have to pay the $90. They charged me $210 for the inspection. I called and requested that we both listen to the call (Because all calls are recorded) They played the call, heard what the rep said and then stated they would get back to me. When I finally reached them again (they never called me back), they stated I would not get a refund, then replayed the call cutting out the part when the rep stated clearly that the service was only $90. They not only GASLIGHTED me, but they altered the recording. $120 may not matter to most but it sure matters to me."

Kay H on June 2025


Advanced Green Home Solutions

1125 West St. Ste 421
New on AngiNew on Angi
Approved Pro

Advanced Green Home Solutions

1125 West St. Ste 421
New on AngiNew on Angi
Approved Pro
4 years of experience
Free onsite estimate

Advanced Green Home Solutions is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Advanced Green Home Solutions is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!

Advanced Green Home Solutions is dedicated to providing our customers with the best quality and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Advanced Green Home Solutions is a leader in providing our customers with the highest quality products and craftsmanship in an honest, efficient, and professional way. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations. We look forward to working with you!


Elysian Energy, LLC

14300 Cherry Lane Ct., Suite 214
New on AngiNew on Angi
Approved Pro

Elysian Energy, LLC

14300 Cherry Lane Ct., Suite 214
New on AngiNew on Angi
Approved Pro
18 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 Elite Thermal East

Elite Thermal East

1215 Algonquin Road
4.58(
88
)
Approved Pro

Elite Thermal East

1215 Algonquin Road
4.58(
88
)
Approved Pro
Customers say: True professional
114 local quotes requested
4 years of experience

We are one stop shop for all of your insulation needs. The President and Founder of Elite Thermal is a 2nd generation insulation specialist with over 20 years of experience hailing from a bloodline with over 45+ years of experience/ownership in the insulation business. We are a tight knit family business building a new insulation business in Maryland. We promise to bring integrity, honesty and full transparency from initial consultation to final job walk thru. Our motive is to offer ELITE service and a quality install while always being attentive to our customers interests and needs :)

"David was very professional and had great communication throughout the process. He explained what I needed and answered all my questions to my satisfaction. His crew was equally professional and considerate in making sure that they did a good job. They took precautions to make sure that there was no mess or damage done. Even installed an attic tent for us. I highly recommend David. "

Fritz M on September 2025

We are one stop shop for all of your insulation needs. The President and Founder of Elite Thermal is a 2nd generation insulation specialist with over 20 years of experience hailing from a bloodline with over 45+ years of experience/ownership in the insulation business. We are a tight knit family business building a new insulation business in Maryland. We promise to bring integrity, honesty and full transparency from initial consultation to final job walk thru. Our motive is to offer ELITE service and a quality install while always being attentive to our customers interests and needs :)

"David was very professional and had great communication throughout the process. He explained what I needed and answered all my questions to my satisfaction. His crew was equally professional and considerate in making sure that they did a good job. They took precautions to make sure that there was no mess or damage done. Even installed an attic tent for us. I highly recommend David. "

Fritz M on September 2025


United Solar

No reviews yet

United Solar

No reviews yet

If you're looking to save money, stop renting your electricity from your electric company and take control of your monthly electric bill- solar can help! With great warranties, completely virtual and free consultations, we can evaluate your house, your needs and what solar will look like for you to see if its a good fit! Solar is growing and more and more people are reaping the finial benefits of solar every day. Contact me to see what solar would look like for you!

If you're looking to save money, stop renting your electricity from your electric company and take control of your monthly electric bill- solar can help! With great warranties, completely virtual and free consultations, we can evaluate your house, your needs and what solar will look like for you to see if its a good fit! Solar is growing and more and more people are reaping the finial benefits of solar every day. Contact me to see what solar would look like for you!


RSS Solar

Aurora Ave.
No reviews yet

RSS Solar

Aurora Ave.
No reviews yet
Free onsite estimate

We make solar simple-- We are dedicated to making solar energy affordable and accessible to everyone-- with ZERO upfront costs.* Your home can become its own tiny power station and generate plenty of reliable energy, all while reducing your electricity bill. Plus, it doesn't hurt that your greener lifestyle will help your state achieve its renewable energy goals.

We make solar simple-- We are dedicated to making solar energy affordable and accessible to everyone-- with ZERO upfront costs.* Your home can become its own tiny power station and generate plenty of reliable energy, all while reducing your electricity bill. Plus, it doesn't hurt that your greener lifestyle will help your state achieve its renewable energy goals.


Bayfront Heating and A/C

5.00(
6
)

Bayfront Heating and A/C

5.00(
6
)
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers

We are a small family owned company. We are reliable, trustworthy, and caring. We offer replacement, service, duct modification, and maintenance.

"I received great service with this company! My problem was fixed in a timely manner and done efficiently. I even received a call months down the road from the company making sure everything was still running smoothly. I’m highly impressed with this company and will use them again/recommend them to anyone who has HVAC needs! Thank you to Nick and Bayfront for your great service!"

Ryshelle W on December 2022

We are a small family owned company. We are reliable, trustworthy, and caring. We offer replacement, service, duct modification, and maintenance.

"I received great service with this company! My problem was fixed in a timely manner and done efficiently. I even received a call months down the road from the company making sure everything was still running smoothly. I’m highly impressed with this company and will use them again/recommend them to anyone who has HVAC needs! Thank you to Nick and Bayfront for your great service!"

Ryshelle W on December 2022


TPG Home Inspections, LLC

4806 Saint Barnabas Rd
No reviews yet

TPG Home Inspections, LLC

4806 Saint Barnabas Rd
No reviews yet
5 years of experience

Complete Home Inspection and Consulting Services INSPECTION SERVICES: Home Buyer Seller Pre-Listing Baltimore Rental Townhouse/Condo/Duplex Pre-Drywall Repair Verification Green Building ANCILLARY SERVICES: Home Energy Score Thermal Imaging Home Energy Report Indoor Air Quality Radon Testing This is a veteran owned business bringing 30+ years of building and engineering experience to serve you!

Complete Home Inspection and Consulting Services INSPECTION SERVICES: Home Buyer Seller Pre-Listing Baltimore Rental Townhouse/Condo/Duplex Pre-Drywall Repair Verification Green Building ANCILLARY SERVICES: Home Energy Score Thermal Imaging Home Energy Report Indoor Air Quality Radon Testing This is a veteran owned business bringing 30+ years of building and engineering experience to serve you!

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Energy Efficiency Auditing questions, answered by experts

If your AC runs constantly, it could be due to a number of things, including a faulty thermostat, incorrect temperature settings, or broken equipment. Alternatively, you might have an airflow problem (for example, blocked vents or leaky ductwork). Either way, an HVAC pro can identify the specific problem and fix it for you.

Smart glass doesn’t use a lot of electricity, and you can expect a standard window to add between $1 and $2 per year to your electric bills. Smart glass is proof that energy-efficient windows work. Although your smart windows may consume a little energy to operate, they can save enough energy to offset the costs. If you’re concerned about the minimal bump to your electricity consumption, you can opt for smart tint, which doesn’t require electricity to work.

No, it isn’t necessary to have energy-efficient windows. However, if you care about your energy bill and making your windows more energy efficient, fixing any heat, UV, or air transfer issues is an excellent way to lower your bills and keep your house cooler in the summer and warmer in the winter.

Smart home upgrades can be worth the money. Several upgrades, including smart thermostats and ceiling fans, can help reduce your energy bills. Others make life more convenient, freeing up your time to do what you love (or get more work done). And some smart home upgrades, such as entertainment systems, simply make life more enjoyable. All are worthy causes.

Gas fireplaces use either natural gas or propane—both of which will increase your energy expenses. On average, running a gas fireplace costs $400 to $640 per year; however, these costs can vary significantly depending on the fuel price in your area and the frequency of fireplace use. If you’re looking for a more energy-efficient option, consider switching to an electric fireplace.

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The Lothian, 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.