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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

While some aspects of an appraisal, such as comparable properties nearby, are out of your control, there are several steps you can take to potentially increase your home's value. Make any necessary repairs and upgrades before the appraiser's visit, as they can only value what is currently part of the home, not its potential. Examples include renovating older areas, updating landscaping to boost curb appeal, and staging your home. You can also provide the appraiser with the cost of recent upgrades, which may increase your home's value by about 50% or more of what you paid for those improvements.

The three levels of home energy audits include:

  • Level 1: Review of your energy bills and home for signs of energy inefficiency and areas for improvement. The average cost range is $0.08 to $0.12 per square foot.

  • Level 2: A level 2 ASHRAE energy audit costs $0.12 and $0.35 per square foot. In-depth analysis of your energy usage and provides a report of cost-saving changes.

  • Level 3: Comprehensive analysis and detailed recommendations for ways to improve your home’s energy efficiency. A level 3 audit costs about $0.36 to $0.50 per square foot.

While many states require all new construction to undergo blower door tests, it’s not a requirement for existing homes. But in both cases, a blower test helps confirm that the contractor has sealed the exterior, that the type of ductwork installed is functioning properly, and that your home is as efficient as possible.

String lights require electricity, but not an excessive amount, especially when compared to other lighting fixtures. LED rope lights, for instance, consume around one watt per foot. Running six or seven light strings simultaneously should only cost you around $10 to $15 each month. You can save even more money by remembering to turn off your lights during daylight hours. 

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 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.