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*The Angi rating for Energy Efficiency Auditing companies in Belgrade, MT 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 Belgrade, MT 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 July 28, 2026

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Avatar for Polar Aire LLC
Polar Aire LLC
5.0(
3
)
Energy Audit - For BusinessHome Energy Audit

Serving Belgrade, MT and surrounding areas

In business since 2023

Free estimates

Emergency services offered

"Daniel was prompt, careful and went the extra distance to get my heating and hot water system replaced as the weather was turning cold. He did an excellent job and I recommend him highly."
750 cfm Make Up Air System
Fresh air electric heater
750 cfm Make Up Air System
Additional Photos
Additional Photos

+1

Recommended by100%of homeowners
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Avatar for PowerHouse, LLC
PowerHouse, LLC
New to Angi
Energy Audit - For BusinessHome Energy Audit

Serving Belgrade, MT and surrounding areas

In business since 2010

Free estimates

Warranties offered

PowerHouse, LLC can manage every aspect of improving the efficiency of your home or business. From the comprehensive audit and system design to the implementation and application for tax credits and rebates, we ensure you the maximum return on your investment � the benefits of which are financially tangible and environmentally invaluable. Please contact PowerHouse to make an appointment!

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Avatar for Planetary Systems, Inc.
Planetary Systems, Inc.
0.0(
3
)
Home Energy Audit

Serving Belgrade, MT and surrounding areas

In business since 1994

Free estimates

Credit card accepted

Planetary Systems has been designing and installing renewable energy systems since 1994, and has over 1600 operational systems from .5kw to 22kw, worldwide. We have always been and remain committed to tested and reliable, yet cutting edge technologies to advance local power generation capabilities. We firmly believe all electrical power should be locally generated and using as much energy as practically feasible from wind, solar, hydro-electric and other renewable sources. \n Planetary Systems offers our own battery technology, integrated power solutions, and the best available products available in the world marketplace.\n\nOur offerings are based on value-added products, not bargain basement prices, and include complete testing, design and integration of systems plus expert technical assistance.

Grid-tie sell back power system
Gird-tie sell-back power system
Off-grid power system
Grid-connected back power
Pole mounted solar arrays

+7

Recommended by100%of homeowners
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Energy Efficiency Auditing questions, answered by experts

If you have central air conditioning, it’s fine to run your AC all day if that’s what you want—as long as the AC unit is in good condition. But if your AC runs constantly when you don’t want it to, there may be a problem with your system (like the ones we’ve mentioned above). Window AC units and wall air conditioners aren’t as powerful as central AC, so you should only run those kinds of air conditioners for eight to 12 hours at a time.

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.

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.

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

Modern windows provide enhanced UV protection, improved heat retention, and cooling efficiency, contributing to overall household energy savings.

The Belgrade, MT 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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