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TRUSTED BY LANCASTER, SC HOMEOWNERS

  • Average homeowner rating star icon4.3
    Average homeowner rating
  • Verified reviews icon14
    Verified energy efficiency auditing services reviews

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

Avatar for ADT Solar
ADT Solar
4.4(
111
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2008

Free estimates

Warranties offered

"We met with 3 different companies to advise on getting solar panels. The first 2 companies basically just told us what size system we could get based on state and federal tax rebate levels. Heard an advertisement for Sunpro on radio and decided to call them; turned out to be a good decision. Kara with Sunpro was extremely informative and had a nice package put together for us to review. She even researched our home and had an idea of how much production we could expect with the recommended solar panels. Even after selecting Sunpro, I called Kara with questions about things I'd heard from others or something I forgot to ask. I never felt like I was a burden and she always returned my calls if I had to leave a message. The complete team with Sunoro were professional and eager to help. Satisfied with new solar system and looking forward to enjoying savings on electric bills.
"
11 kW PV Installation
5 kW PV Installation
9.5 kW PV Installation
Recommended by89%of homeowners
Avatar for South Carolina Solar Project
South Carolina Solar Project
5.0(
9
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2017

Free estimates

"Jon Mason with South Carolina Solar Project did an amazing job start to finish. From the initial consultation and review of solar energy to the installation, topnotch professionalism. Jon's technical expertise, financial knowledge and passion for solar energy is evident and assured me that I was making the right choice to go Solar. I would, and have, highly recommend South Carolina Solar Project to anyone looking to go Solar!"
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+61

Recommended by100%of homeowners
Avatar for Fresh Air Technologies, LLC
Fresh Air Technologies, LLC
4.4(
239
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2001

Credit card accepted

"Outstanding! Mario and his workers did a fantastic job! They removed all insulation. They sanded off all wood and treated with a solution to kill any residual mold. They placed new insulation. They encapsulated the whole crawl space and placed a dehumidifier. I felt very confident that the job was "done right". The whole organization very professional."
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+4

Recommended by87%of homeowners
Avatar for Sound Advice
Sound Advice
4.5(
58
)
Energy Audit - For BusinessHome Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"If you are looking for someone to install home theater--don't even bother looking anywhere else. Robert's prices were competitive, and he did an absolutely amazing job for us. He even worked overtime to make sure he was finished within the timeframe we agreed upon, and he made sure everything was working perfectly and took the time to walk us through everything. I cannot recommend him highly enough--super nice guy who is very skilled, knowledgable and works tirelessly to make sure you're happy. There's not much more you can ask for in a service provider.
"
Mounted TV
Fireplace
TV above an existing fireplace
Recommended by97%of homeowners
AltruEnergy Building Performance
5.0(
2
)
Home Energy Audit

Serving Lancaster, SC and surrounding areas

In business since 2006

Free estimates

"Chris Folse knows his stuff! He has been a big help teaching and showing us how to make our home more energy efficient. He speaks to you like a person and helps you truly understand your home's energy shortcomings. He is not just out to make a buck. He becomes honestly vested in making your home a more energy efficient place to live. You can tell from the moment you meet him that he is excited about, and strongly believes in, what he does and that translates into his work. I highly recommend his services to anyone interested in making their home more energy efficient."
Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

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.

There are a couple of ways you can save on the cost of your home energy audit. First, find out if you qualify for programs like the Department of Energy’s Weatherization Assistance Program for low-income households. Next, check with your local utility company to find out if you qualify for any local rebate programs to offset the cost of this helpful service.

Yes, skylights can affect a home’s energy efficiency, either positively or negatively. Properly installed, energy-efficient skylights with Low-E coatings, double glazing, and UV-blocking glass can help regulate indoor temperatures and reduce heating and cooling costs. However, poorly insulated or older skylights can contribute to heat loss in winter and excess heat gain in summer, lowering overall energy efficiency.

When installing a new furnace, it's a good time to consider other projects that can enhance your home's energy efficiency. A great first step is to get a home energy audit, which will identify areas for improvement. Common recommendations include sealing or replacing windows and adding insulation to the attic. These upgrades can help you save money on monthly utility costs. You might also consider installing a smart thermostat to make heating your home more convenient and efficient.

Some types of electric fireplaces use more electricity than others. Models that produce 1,500 watts will have more of an effect on your heating bill than 750-watt models. 

Electric fireplaces use an average of $1.85 of electricity every eight hours. These minimal operational costs aren’t likely to make a big difference in your electric bill—unless you’re using it as a primary heating source for your home and it’s running most of the time.

The Lancaster, SC homeowners’ guide to energy efficiency auditing services

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