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TRUSTED BY FOLSOM, CA HOMEOWNERS

  • Average homeowner rating star icon4.4
    Average homeowner rating
  • Verified reviews icon20
    Verified energy efficiency auditing services reviews

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

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

Serving Folsom, CA and surrounding areas

In business since 2000

Free estimates

Emergency services offered

"Excellent Service from planning through Execution and installation to final fine tuning. The folks communicated well and explained every detail of the step. Got permit and inspection done. It was seamless. Thanks. R."
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+32

Recommended by100%of homeowners
Avatar for Mr. Sunshine Solar
Mr. Sunshine Solar
5.0(
15
)
Energy Audit - For BusinessHome Energy Audit

Serving Folsom, CA and surrounding areas

In business since 2013

Free estimates

Credit card accepted

"I got multi quotes before I decided on a Solar company I was really worried about putting it on my roof And wanted to make sure I wouldn’t have one of those large bills at the end of the year. I’ve heard the horror stories! Tyler and Mr.Sunshine Soler answered all my questions. And always made themselves available. I would definitely recommend working with them. Their customer service is top notch and they stay apprised emerging solar technology. Their bid was considerably lower than the others and they were able to give me 100% coverage."
Savalza Solar Patio
Baker PV Solar Install
Savalza Solar Patio
Baker PV Solar Install
Baker PV Solar Install

+1

Recommended by100%of homeowners
Avatar for Diamond Heating and Air
Diamond Heating and Air
4.8(
120
)
Energy Audit - For BusinessHome Energy Audit

Serving Folsom, CA and surrounding areas

In business since 1990

Free estimates

Credit card accepted

"Air conditioning in one zone stopped working over very hot weekend.  Called three companies to get a quote on possibly replacing both zones before I spent money on repairing a 17+ year old unit.
Diamond was the first company with availability.  Before they came over to give a quote, Bob called to ask me a few questions about the nature of the problem.  He speculated over the phone of what the problem might be and what the cost of fixing it would be.
He arrived for the appointment at the appointed time and proceeded immediately to fix the unit while talking to me about an estimate to replace both zones (2 systems).  He spent extra time hunting down an electrical connection issue in the unit and when done, checked out the flow readings of the system.
$258 dollars fixed the problem.  Since I had scheduled him for a quote, he offered to remove the new part that he had just installed or I could leave it in and if I decided to buy a new system, they would credit the repair of this unit back against it.  I elected to have him leave the fix in place.
Bob quoted me an exceptionally good price per unit for a quality Lennox system.  In fact a competitor who came the following day said that he wanted to see a copy of a written quote because Diamond's price was too good.
Although I've decided for the time being to not replace both systems, I would select Diamond Heating and Air in a second!
"
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Recommended by96%of homeowners
Avatar for Service Champions Heating & Air Conditioning
Service Champions Heating & Air Conditioning
4.6(
688
)
Energy Audit - For BusinessHome Energy Audit

Serving Folsom, CA and surrounding areas

In business since 2003

Free estimates

Emergency services offered

"Our Service Tech, Alex Peck, arrived on time to perform the annual check up & tune-up of our HVAC System. He was very professional and following the Tune-Up asked if there was any other items that needed done or looked into that he could take care of. His services were very much appreciated and very professional. Lee"
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+42

Response time9 hrs
Response rate100%
Recommended by91%of homeowners
Avatar for Sunpower Ryan Burr
Sunpower Ryan Burr
5.0(
3
)
Home Energy Audit

Serving Folsom, CA and surrounding areas

In business since 2012

Free estimates

"Ryan was patient and allowed me to ask questions and did not pressure me. If I get approval, from HOA, will hire Ryan to do my solar on the condominium. If approval is not met with the HOA, I will be referring him out and using Sunpower on my next single-family home purchase."
Recommended by100%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

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.

The difference between an energy auditor and a home inspector is primarily in the purpose of the inspection. The energy auditor conducts tests in your home to determine the energy efficiency levels in areas like windows, insulation, and doorways. The auditor then makes recommendations for ways to improve a home’s energy efficiency. 

A home inspector examines various structures of your home to determine that everything is up to code and gauge the condition of features like the roof, foundation, HVAC, and electrical. The home inspector reports on the overall home and makes repair recommendations.

Yes, mini-split or ductless AC systems add value to a home and do not devalue it. They are an attractive feature for potential buyers, especially in older homes without existing ductwork, as they provide a practical air conditioning solution without the significant expense and hassle of installing traditional ducts. Ductless systems also eliminate issues associated with conventional ductwork, such as noise and the potential for pests. Furthermore, homeowners value energy-efficient solutions, and mini-splits offer high efficiency for both heating and cooling, plus zoned temperature control. This leads to lower energy consumption and reduced electric bills, which is a major selling point.

Installing weather stripping or upgrading to insulated panels can improve efficiency.

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.

The Folsom, 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.