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TRUSTED BY TEMPE, AZ HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon29
    Verified energy efficiency auditing services reviews

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

Avatar for Marshall Insulation
Marshall Insulation
4.1(
47
)
Home Energy Audit

Serving Tempe, AZ and surrounding areas

Approved

In business since 2005

Free estimates

Credit card accepted

"Marshall Insulation was great. They arrived early and worked quickly and efficiently. For a messy job they made sure it was clean when they left. Jeff did a good job explaining the SRP programs,"
Response time2 days
50 neighbors recently requested a quote
Recommended by93%of homeowners
Avatar for Marshall Insulation
Marshall Insulation
4.5(
155
)
Energy Audit - For BusinessHome Energy Audit

Serving Tempe, 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
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Energy Efficiency Auditing FAQs, answered by experts

When combined with a substantial solar system, if you have enough Powerwalls, you could go off-grid and be energy independent. But remember, you'd need enough Powerwalls to power your whole home continuously because a single Powerwall can’t power large appliances for extended periods. One Powerwall is able to power an average-sized home's emergency circuits, lights, and outlets. To power large appliances, you likely need two or three Powerwalls.

No, it isn’t necessary to have energy-efficient windows. However, if you care about your energy bill and making your windows more energy efficient, fixing any heat, UV, or air transfer issues is an excellent way to lower your bills and keep your house cooler in the summer and warmer in the winter.

You can increase your home’s load factor by replacing fuse boxes with a circuit breaker, hiring a licensed electrician to upgrade your electrical panel, upgrading wiring, or installing subpanels. An electrical inspection by an expert can help determine the state of your current electrical systems and how they can be improved.

Electric bills tend to be lower in spring and fall because people use less electricity during these seasons. Milder temperatures allow for less use of heating and cooling, unlike during winter and summer, which usually bring more extreme temperatures.

Attic and whole-house fans improve a home's energy efficiency and comfort. They ventilate hot air from the attic, which reduces peak cooling loads, lowers reliance on air conditioning, and decreases indoor temperatures. This improved air circulation and expedited heat exit helps lower cooling costs, balance moisture levels, and enhance overall natural airflow, contributing to the efficient operation of other home equipment.

The Tempe, 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.