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*The Angi rating for Energy Efficiency Auditing companies in Freeport, MI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.

*The HomeAdvisor rating for Energy Efficiency Auditing companies in Freeport, MI is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Energy Efficiency Auditing needs.

Last update on March 25, 2025

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

Avatar for USA Insulation of Grand Rapids
USA Insulation of Grand Rapids
4.0(
113
)
Home Energy Audit

Serving Freeport, MI and surrounding areas

Approved

In business since 1977

Free estimates

Warranties offered

"The workers were very professional. They were here on time and worked diligently. There was a misunderstanding on some areas to do and they returned to do the extra areas. I would highly recommend this company."
Our Work
Our Work
Our Work
Our Work
Attic Insulation

+6

Response time3 hrs
35 neighbors recently requested a quote
Recommended by87%of homeowners
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Double Check Inspect
3.8(
26
)
Home Energy Audit

Serving Freeport, MI and surrounding areas

In business since 2000

Free estimates

Credit card accepted

"My first impression of Justin was over the phone. He was clear about what he does, very personable and just seemed to be very real and honest. He came out and seemed happy to answer all of my questions about his findings. He also gave me quick-fix and long-term solutions to each and every problem that he found with my home. He was patient, kind and thorough and I would highly recommend him to any friends and family that ever were in need of a home inspection."
Response time3 hrs
Recommended by80%of homeowners
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Kyle Tissue
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Freeport, MI and surrounding areas

In business since 2022

Free estimates

Credit card accepted

Are you trying to find ways to save money on energy costs? Have you been interested in finding out if you qualify for Solar energy? If you're not already signed up to get your solar panels installed, reach out to (company name) right away! The sooner you call, the sooner the energy savings can begin! At Lightskye we have Energy

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Avatar for Greenshield Insulation
Greenshield Insulation
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Freeport, MI and surrounding areas

In business since 2016

Free estimates

Emergency services offered

Greenshield Insulation is a family-owned and operated company proudly serving Mattawan and surrounding areas within a 40-mile radius since 2016. We specialize in high-quality residential and light commercial insulation services, including spray foam (open and closed cell), blown-in cellulose, insulation removals, attic and sidewall retrofits, and ventilation solutions. With over 50 years of combined experience, we’re SPF-certified, licensed, and insured—bringing knowledge, professionalism, and attention to detail to every project. Our team helps homeowners lower energy bills, improve comfort, and qualify for available rebates and tax credits. We offer free estimates and honest guidance to help you choose the best insulation for your home or building. Serving Kalamazoo, Portage, Paw Paw, Battle Creek, and more.

Attic Insulation Experts
Attic Insulation Experts
Attic Insulation Experts
Attic Insulation Experts
Attic Insulation Experts

+11

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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.

STC (Sound Transmission Class) is a rating that describes how well a building material or assembly blocks airborne sound. A higher STC rating means less noise will pass through the material, providing better sound reduction. This rating system applies to various building components, including windows, doors, flooring, drywall, and insulation.

For context, a typical single-pane window has an STC rating of around 25 (where normal conversations are audible), while a well-sealed, double-pane window can exceed STC 45 (blocking loud speech and most music). It is important to note that for some products, like soundproofing drywall, the STC rating refers to the entire wall system, not just the individual panel.

Additionally, STC ratings are most effective for measuring sound reduction at mid-to-high frequencies, such as human speech, and may not accurately reflect how well a material blocks low-frequency sounds like bass music or thunder. Because of these factors, it is recommended to consult a professional to determine the right STC-rated materials for your specific soundproofing needs.

Audits include inspecting insulation, HVAC systems, windows, and appliances to identify energy inefficiencies.

There is no blanket figure for a residential home’s electrical load, since load varies by the size of the home, how many appliances are used, and the efficiency of their electrical systems. Typically, however, it’s safe to assume 40 to 60 amps is the average electrical load of a residential home. 

There are several signs that your house might have poor ventilation, including lingering odors, condensation on your windows, or mold and mildew. Your home may also feel stale and stuffy, or you might have trouble maintaining a comfortable temperature in your home. On top of that, you might develop allergy symptoms, such as sneezing, coughing, or headaches.

The Freeport, 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.

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