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TRUSTED BY WILLIS, MI HOMEOWNERS

  • Average homeowner rating star icon4.6
    Average homeowner rating
  • Verified reviews icon28
    Verified energy efficiency auditing services reviews

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

Avatar for Air Conditioning Engineers
Air Conditioning Engineers
4.6(
70
)
Energy Audit - For BusinessHome Energy Audit

Serving Willis, MI and surrounding areas

In business since 1969

Emergency services offered

Credit card accepted

"They also do plumbing. Everything is top notch there too. The first time they came it turned out we had to make an insurance claim before he could make the repair. He waived the inspection fee and we got the insurance claim done. The insurance hired clean up people. What happened was that house has 3 levels and the lowest level is slightly below grade and it requires a sewage ejection pump to get things up to the septic system. The sewage ejection pump failed and there was raw sewage in the basement."
Recommended by85%of homeowners
Avatar for Washtenaw Blower Door Services
Washtenaw Blower Door Services
5.0(
2
)
Home Energy Audit

Serving Willis, MI and surrounding areas

In business since 2016

Free estimates

Credit card accepted

Welcome to Washtenaw Blower Door Services, your premier Home Inspector, Indoor-air quality testing, and Home Energy evaluation service. Owner and operator Adam Carr has performed over 2,000 home inspections and energy evaluations over the course of his career. His specific services include home inspections and blower door testing, a new standard required by the state of Michigan. He also utilizes state of the art thermal imaging to determine how efficient and insulated the home is. He also provides a comprehensive report with those digital and thermal images. His home inspection reports provide a comprehensive list of the best "order of operations" and cost-effective solutions to any problems or issues he detects. Call today for a quote!

Point of air-infiltration
Thermal image
Missing knee-wall insulation in attic
What area looks like after insulation is installed
Response time10 mins
Response rate100%
Recommended by100%of homeowners
Avatar for R & L Fire & Water Restoration
R & L Fire & Water Restoration
5.0(
20
)
Energy Audit - For BusinessHome Energy Audit

Serving Willis, MI and surrounding areas

In business since 2004

Free estimates

Emergency services offered

"I'm extremely satisfied with the work that was performed.From the first day that I got in contact with the company,I was assured that everything would be ok.Tom of R & L came to my building and assessed the situation and he immediately began to make calls to get things back in order for me.Because of the fire damage my building and contents were in bad shape.Tom was able to contact my insurance adjuster and before you know it there was all kinds of action going on in my building to get things back in order.I must say that I do now have a very professional and new looking building from the work done by R & L company.Of all the different people that Tom had to come and perform work on my building,they were all professional with very positive attitudes,and I felt comfortable with them being in my building.I will be recommending the services of R & L in the future,they are a great company and I love the work that they did for me.

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Recommended by100%of homeowners
Avatar for Lombardo Total Home Solutions LLC
Lombardo Total Home Solutions LLC
3.9(
308
)
Energy Audit - For BusinessHome Energy Audit

Serving Willis, MI and surrounding areas

In business since 2001

Emergency services offered

Credit card accepted

"We were cancelled once or twice and then he finally made it out. The serviceman was pretty friendly and good in his assessment. We were satisfied when he eventually showed up.He confirmed what we were already told before. He was thorough and knew what he was talking about. The price was good and he was professional."
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Recommended by79%of homeowners
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Energy Efficiency Auditing FAQs, answered by experts

A home energy audit costs about $420 on average, with prices ranging from $100 to $2,250 or more. The final cost depends on factors like your home's size, location, the thoroughness of the audit, and the specific tests performed. A basic Level 1 walk-through inspection typically costs between $150 and $200, while a comprehensive Level 3 audit with detailed testing and a report costs around $900. Homeowners may be able to use the 2022 Inflation Reduction Act’s Energy Efficient Home Improvement credit to cover up to $150 of the audit cost.

Costs for common individual tests include:

  • Blower door test: $350

  • Duct testing: $100

  • HERS test: $375

  • HERS certification: $200

  • Infrared imaging: $200

Smart glass doesn’t use a lot of electricity, and you can expect a standard window to add between $1 and $2 per year to your electric bills. Smart glass is proof that energy-efficient windows work. Although your smart windows may consume a little energy to operate, they can save enough energy to offset the costs. If you’re concerned about the minimal bump to your electricity consumption, you can opt for smart tint, which doesn’t require electricity to work.

Replacing a window frame will improve your home’s energy efficiency if the old frame is cracked or damaged in a way that allows unconditioned air from the outside into your living space or if you upgrade to a more energy-efficient window frame material. Aluminum is the least energy-efficient window frame material, followed by vinyl and wood. Fiberglass and composite frames are the most energy-efficient.

Setting your AC unit to 78 degrees can, indeed, help you save energy. In fact, according to experts, every degree you turn the unit up could save you between 1% and 3% on your energy bills. That said, turning your unit off entirely while you’re out might actually be less efficient than keeping it on at a higher temperature. Why? The unit will need to work extra hard to cool the house back off again after all those hot hours. 

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 Willis, MI homeowners’ guide to energy efficiency auditing services

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