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TRUSTED BY AFFTON, MO HOMEOWNERS

  • Average homeowner rating star icon4.8
    Average homeowner rating
  • Verified reviews icon89
    Verified energy efficiency auditing services reviews

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

Avatar for St Louis Insulation
St Louis Insulation
4.9(
67
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2001

Free estimates

Credit card accepted

"I was totally satisfied with this Company from the beginning to the end. I scheduled an appointment and was seen right away. A representative came to my home and assessed what I needed to have done. The price was reasonable and the work was completed in a timely fashion. I would recommend this Company in a HEARTBEAT!! Thanks for ALL that you DO!!"
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+40

Recommended by98%of homeowners
Avatar for Foam Engineers
Foam Engineers
4.8(
229
)
Home Energy Audit

Serving Affton, MO and surrounding areas

In business since 1988

Free estimates

Credit card accepted

"Fantastic experience with Paul, Mindy and their team when they helped us insulate the attic spaces surrounding and above our 1.5 story house. We have immediately seen the benefit from the insulation through our energy consumption, reducing the run-time of our unit by ~4 hours a day on like-weather days. This team will take care of your exact needs by tailoring their solutions to your specific situation and they don't cut any corners in ensuring your getting the value deserved!"
Top Plates/ Wiring
Top Plate / wiring
Sealed Duct Work
Sealed Duct Work
Sealed Duct Work

+17

Response time9 hrs
Recommended by98%of homeowners
Peterson Energy Consultants
3.9(
67
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 1978

"We called for a quote and Mindy came the same day to review our spaces and provide a price. After rain cancelled our first installation, the second date was dry and the team of three guys were on time. They reviewed where we wanted the tubes and took their time with the installation. The addition of natural light makes a huge difference and we are very satisfied with the product and the installation."
Recommended by80%of homeowners
Avatar for Gant Heating and Cooling
Gant Heating and Cooling
5.0(
10
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2006

Free estimates

Emergency services offered

At Gant Heating and Cooling we are the top rated Heating and AC provider in the St. Louis area. With over 20 years of experience no job is too complex for us. We cover all residential and commercial repairs, replacements, and new construction jobs. We are experts at solving problems and helping our customers find the most cost effective way to fix their problem. Call us today for your free estimate! Repair and service HVAC equipment

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+1

Recommended by100%of homeowners
Al's Handyman Service
4.8(
45
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2004

Free estimates

"I have worked with Al on several occasions now.  I CANNOT say enough good things about his service!  He is responsive, trustworthy and just plain good at fixing stuff!  We trust him to go to our home even when it is vacant to assess and repair areas as needed.  He is conscientious and a great provider to work with!
"
Recommended by92%of homeowners
Avatar for American Society of Heating & Cooling Specialists
American Society of Heating & Cooling Specialists
5.0(
1
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 1995

Emergency services offered

Credit card accepted

HVAC Technicians At Your Service Since 1991; As a fully licensed, bonded and insured air conditioning, heating and ventilation company, American Society of Heating and Cooling Specialists provides residential and commercial maintenance, installation and repair services on all major brands of heating, air conditioning and restaurant equipment to customers throughout St. Louis, St. Charles, and the surrounding areas.

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Recommended by100%of homeowners
Avatar for Happy Roof
Happy Roof
3.3(
22
)
Energy Audit - For BusinessHome Energy Audit

Serving Affton, MO and surrounding areas

In business since 2015

Free estimates

Emergency services offered

Happy Roof is a locally owned company who specialize exterior improvements. Located in St. Charles, MO, we serve the entire metro area. We use only the highest quality material and trained professional craftsman. \n \nWhen interacting with Happy Roof, you will notice that we are particularly focused on the principles of quality workmanship, timely completion, competitive pricing, and integrity in all our business dealings. We combine knowledge and research, with our extensive practical experience, to ensure a specialized approach for your project. \n \nContact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing, list of happy customers.

Slate Replica
Slate title profile
Slate title profile
Spanish Clay
Slate title profile

+46

Response time2 days
Recommended by71%of homeowners
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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.

Wood windows fall in the middle of the window frame materials when it comes to energy efficiency. They’re more insulating than aluminum and vinyl, but they aren’t as efficient as fiberglass or composite frames. If you love the look and lifespan of wood windows and want to maximize efficiency, you can upgrade to double-pane or triple-pane glass and consider window tinting and low-emissivity (low-E) coatings to minimize heat transfer.

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.

You can check your home's humidity in a few ways. A simple option is to use a hygrometer, which you can find at a hardware or big box store. Your smartphone may also have an app that can measure humidity. Modern thermostats, particularly smart thermostats, are also able to measure humidity levels.

The answer is a resounding yes, as dishwashers save significant water and energy compared to washing dishes by hand. The difference is so drastic in fact that those who use energy-efficient dishwashers can expect savings of over $450 per year. This is because dishwashers use less water, they wash at a higher temperature than a hand rinse, and you don’t need to rinse them after washing. New dishwashers use around 4 gallons per load, whereas washing by hand can use up to 2 gallons per minute.

The Affton, MO homeowners’ guide to energy efficiency auditing services

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