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*The Angi rating for Energy Efficiency Auditing companies in Mill Spring, NC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.

*The HomeAdvisor rating for Energy Efficiency Auditing companies in Mill Spring, NC is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.

Last update on June 05, 2026

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Avatar for Holler Home Inspections LLC
Holler Home Inspections LLC
New to Angi
Home Energy Audit

Serving Mill Spring, NC and surrounding areas

Approved

Free estimates

Emergency services offered

Warranties offered

Meet Your Home Inspector - Hi there! I’m Dylan Osborne, North Carolina Licensed and InterNACHI Certified Professional Home Inspector – CPI. I hold a Degree in Applied Science; Architecture & Construction Technologies, and 25 years of experience in land surveying, commercial property maintenance, and general manager for a 10-building, 75-unit condo complex in the US Virgin Islands. After Hurricanes Irma and Maria hit in 2017, I supervised the rebuild of the property tougher, stronger, and better than before – complete with a half-megawatt backup generator.\n\nMy knowledge, training, and experience allow me to bring a get-it-done-right attitude to every home inspection. I look forward to putting that knowledge and experience to work for you! \n828-760-7716

Dylan Osborne CPI
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Avatar for Renewable Engineered Systems
Renewable Engineered Systems
4.7(
12
)
Energy Audit - For BusinessHome Energy Audit

Serving Mill Spring, NC 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."
Additional Photos
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+14

Recommended by100%of homeowners
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Avatar for Home Comfort Keepers, LLC
Home Comfort Keepers, LLC
4.3(
9
)
Energy Audit - For BusinessHome Energy Audit

Serving Mill Spring, NC and surrounding areas

In business since 2020

Free estimates

Credit card accepted

"HCK are very professional and excellent customer service. I purchased the MLI and the fan, June 2020. I now sleep better at night because my home is cooler and comfortable, their products are awesome. I recommend to everyone, also you will save energy and money."
Crawlspace Fan
Crawlspace Fan
Crawlspace Exhaust
Drop Ceiling
Attic Chamber

+4

Response time2 days
Recommended by87%of homeowners
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Avatar for Spray Foam Etc.
Spray Foam Etc.
4.2(
6
)
Energy Audit - For BusinessHome Energy Audit

Serving Mill Spring, NC and surrounding areas

In business since 2010

Free estimates

Credit card accepted

"Did a wonderful job, gave me start date. Paid half down and the rest upon inspection. I was very pleased with Jack's work. I've used him in the past, and he always takes care of warranty work."
Recommended by83%of homeowners
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Upstate Energy Solutions
2.5(
2
)
Energy Audit - For BusinessHome Energy Audit

Serving Mill Spring, NC and surrounding areas

In business since 1999

Free estimates

Emergency services offered

Upstate Energy Solutions has a single mission: Complete Customer Satisfaction! We strongly believe in giving our customers the most for their money. We work with only the highest quality materials and experienced professionals. We have consistently focused on the needs of our customers, providing personalized attention and a stress-free experience.

before retrofit
air leaks around house
installing 2 solar fans
after retrofit
rafters exposed

+31

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Shiloh Energy Projects LLC
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Mill Spring, NC and surrounding areas

In business since 2021

Free estimates

Credit card accepted

Were honest, dependable and trying to lead the way for Solar Energy in the Upstate. We are local and are willing to travel. I am excited to work with you on your project. Reliability and quality are our mission. Solar panel installs is our expertise but check out all that we offer. Call for an estimate today!

Response time5 days
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Energy Efficiency Auditing questions, answered by experts

The number one culprit of high energy bills is older appliances, especially fridges and freezers that are left on all the time. These two appliances tend to last a long time, which is good, but it also means that newer models are usually significantly more energy-efficient due to upgraded technology. The second most common reason for a high bill is heating and air conditioning.

Provide utility bills and clear access to all areas of the home, including the attic and basement.

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.

Costs depend on the property size, audit complexity, and whether additional testing (e.g., blower door) is included.

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.

The Mill Spring, NC homeowners’ guide to energy efficiency auditing services

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

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