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Best energy efficiency auditors near Phoenix, AZ

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

Avatar for AC and Refrigeration
AC and Refrigeration
4.8(
77
)
Energy Audit - For BusinessHome Energy Audit

Serving Phoenix, AZ and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Amazing. I can't say more positive things about Dave and his crew. He answers the phone, is honest, goes out of the way for the customer, and is a true professional. What most impresses me about Dave is how honest, direct, knowledgable and professional he is. He tells you the truth and only charges what is necessary. He has a small crew and makes sure that the job is actually well done. How rare is that? There are so many companies in the Valley that overcharge you to take advantage, and their technicians have no idea what they are doing. Dave is a small business owner role model. He even went out of his way over the weekend to get the manufacturer replace a part under warranty- he is truly amazing."
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+13

Recommended by92%of homeowners
Avatar for Marshall Insulation
Marshall Insulation
4.5(
155
)
Energy Audit - For BusinessHome Energy Audit

Serving Phoenix, AZ and surrounding areas

In business since 1998

Free estimates

Credit card accepted

"I called to set up a free consultation and was promptly met at the agreed upon time. We discussed my desires and how to achieve my project goals. I was given a quote and agreed upon the price for the garage work to be done the following week when I was free. The spray foam and "drill and fill" have been awesome! I have a 24K BTU AC unit in the garage that was unable to keep the temps low as there was so much heat in the garage all day. After the insulation was done it can hold the temps at 70F in the garage while barely turning on during the day. The attic above the garage tops out at 85F when it was over 110F outside, just amazing. We had them do a home energy audit and found that there were plenty of leaky areas in the attic and the insulation was 15 years old and about an R-10 level. It needed some serious work so we agreed to have it topped off with new fiberglass insulation. The guys came out and did and amazing job bringing me up to R-39 as well as keeping the house very clean while doing it. On both days they cleaned up after themselves and took great care of my house. I would wholeheartedly recommend them to anyone that could use more insulation!"
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Recommended by88%of homeowners
Horizon Energy Systems
4.7(
14
)
Energy Audit - For BusinessHome Energy Audit

Serving Phoenix, AZ and surrounding areas

In business since 1978

Free estimates

Credit card accepted

"Brad is passionate about energy savings and loves to help customers implement creative solutions. He thinks outside the box and brings valuable advice to the table, sometimes including ones that reduce his own fees.
By carefully considering all the facets of the situation, he helped me select a 2-ton unit to replace my aging, poorly installed 3-ton. Improvements to the ducting, etc. made up the difference. The house is now quieter and cools at least as well as before. The installation is also much more visually appealing than the last one. My new unit should last many trouble-free years, saving money all the while. I didn't check around to see if he was the cheapest, but the price was definitely reasonable.
We also worked together to install a small mini-split heat pump in an addition that no HVAC before. I wanted a unit he wasn't familiar with and had some picky ideas about how it should be installed. He was open-minded about how to make it work and the project was a success. His fees were pretty reasonable on this job, too.
I have at least one other project that I'll be doing with Brad this year. I wish more HVAC contractors were as creative and flexible as he is. This city would be a much cooler place!
"
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.

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.

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.

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.

Expert installation optimizes insulation properties, cutting energy costs and enhancing home comfort year-round.

The Phoenix, AZ homeowners’ guide to energy efficiency auditing services

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