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Best energy efficiency auditors near Orange County, CA

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Top-Rated Energy efficiency auditors in Orange County - Updated Nov 2026

Avatar for Trinity Heating and AC
Trinity Heating and AC
5.0(
10
)
Home Energy Audit

Serving Orange County, CA and surrounding areas

Approved

Super Service Award Winner

In business since 2021

Free estimates

Emergency services offered

"We are very grateful to have had Trinity repair our heater. Chris is very professional and his prices are the fairest of all the choices we researched. His commitment to excellence is much appreciated & we look forward to having him take care of any future repairs."
After: brand new furnace with industrial grade filtration system. Re-wrapped ductwork with fiberglass free wrapping and acoustic soundproof closet/return cavity.
After: 2 Stage Variable Speed Furnace installed perfectly!
After: Properly sized, energy efficient, and installed to code.
Before: Homeowner had tried multiple times to get the pilot light ignited.
Before: Old furnace not installed to code.

+31

1 neighbors recently requested a quote
Recommended by90%of homeowners
Avatar for Insulation Nation, LLC
Insulation Nation, LLC
5.0(
7
)
Home Energy Audit

Serving Orange County, CA and surrounding areas

Approved

In business since 2023

Free estimates

Emergency services offered

"They simply did a great job. I had them remove the old insulation, install new batt insulation, and add radiant barrier in my attic. Now my attic and house are a whole lot cooler. It is noticeably cooler in the house. The person who contacted me was Dustin. He was very professional and did a great job explaining things to me and laying out my options. The crew, which included Aldo, Roman, and Aaron were very professional and respectful to the care of our home and performing their job. I would definitely recommend and am willing to rehire them again for possible future projects. Thanks guys."
Air Seal (Mineral wool light covers) and Batt - R38 Attic
Vaulted/Cathedral Ceiling - R43 Combo of RIgid Foam Board and Batt
Same
Full Removal, Radiant Barrier and Replacment
Batt Insulation In Attic Perpendicular Layered

+33

48 neighbors recently requested a quote
Recommended by14%of homeowners
Solar Energy License Not Yet Provided
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Orange County, CA and surrounding areas

Approved

In business since 2021

Free estimates

Credit card accepted

Empowered Solutions is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business. \n

Response time40 mins
Avatar for JO Solar Designs
JO Solar Designs
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Orange County, CA and surrounding areas

Approved

In business since 2018

Free estimates

Offers commercial services

JO Solar Designs is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests and make their concerns the basis of our business.

Response time2 days
Avatar for Mega Power Electric, Inc
Mega Power Electric, Inc
5.0(
191
)
Energy Audit - For BusinessHome Energy Audit

Serving Orange County, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"We recently had Mega Power Electric Inc install a solar system and panels. The President and provided excellent communication all the way through the process. He even met with us after installation to explain the almost incomprehensible PG&E bill. Although not the least expensive bid, his was competitive and I felt he was as interested in educating me about solar and the various types of panels and inverter systems as he was in selling a system. He demonstrated how the array of panels would meet our energy needs and as opposed to some of the other companies, wasn't selling us more than we needed. We are very satisfied with our solar system and I highly recommended Mega Power Electric Inc."
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+32

Recommended by100%of homeowners
Avatar for Independent Energy Solutions
Independent Energy Solutions
4.9(
14
)
Energy Audit - For BusinessHome Energy Audit

Serving Orange County, CA and surrounding areas

In business since 1998

Free estimates

Credit card accepted

"The guys an Independent Energy Solutions helped me finish the solar installation on my house, ensuring 100% code compliance, and finalizing the connections to the grid.  They were extremely responsive and very quick.   They have since helped a number of the homeowners in our neighborhood fix and/or upgrade systems originally installed by Shea Homes (original home builder) in 2002 and 2003.
"
Bonita, CA 5.4 kW
Encinitas, CA 9.18 kW
Bonita, CA 5.4 kW
Escondido, CA 5.6 kW
Chet Holifield Federal Building, Laguna Niguel, CA 914 kW

+3

Recommended by92%of homeowners
Avatar for Green Source Energy INC.
Green Source Energy INC.
4.7(
42
)
Energy Audit - For BusinessHome Energy Audit

Serving Orange County, CA and surrounding areas

In business since 2006

Free estimates

Credit card accepted

"We purchased the home energy audit with the understanding that we would be receiving a more extensive analysis of our home energy usage along with possible solutions. Ultimately, the process was more about a presentation for solar panels that anything else, which was not what we were looking for when we purchased the offer. Richard was very professional and thorough in his presentation and presented options regarding areas to save in terms of energy usage but those areas were not as thoroughly explored as the solar discussion. Green Source Energy should be more direct about what the Home Energy Audit entails so buyers can make an informed decision."
Recommended by91%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

Leaving lights on raises the electric bill, but not as much as having high-wattage light bulbs. The best way to save on electric costs is to swap your light bulbs to LED or CFL bulbs that use far fewer watts. You can also use smart lights and light switches to control usage via a smartphone or voice-controlled device.

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.

Energy output depends on turbine size, average wind speed at your site, and system efficiency. A 5 kW turbine in a good wind location can generate 8,000 to 12,000 kilowatt-hours per year, which may cover a large portion of an average home’s needs. Accurate output estimates require a professional wind assessment and a review of your household’s energy usage patterns.

A whole-house humidifier can positively impact energy consumption by improving heating efficiency. During colder months, humidified air feels warmer, which allows you to lower your thermostat without sacrificing comfort. This adjustment can lead to significant energy savings as your heating system works more efficiently. However, it's important to use the humidifier judiciously, as excessive humidity could potentially strain your cooling system in warmer months.

Depending on the level of audit you choose, a home energy audit will at least include a walk-through of the home to determine visible inefficiencies, but may include testing and a highly detailed inspection and report laying out the home’s inefficiencies and providing recommendations to fix those issues. The audit may also include a review of utility bills and mechanical testing. Consult your home energy auditor about the types of services they provide before hiring.

The Orange County, CA homeowners’ guide to energy efficiency auditing services

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