Do whole-house humidifiers cause mold in ducts?

• <div><p>Damp air from a humidifier can cause mold in ducts if it raises the air's humidity level too high for the duct system to handle or malfunctions, but it’s not a normal occurrence. To avoid mold trouble, set the humidistat to between 30% and 35% and inspect it often to ensure accuracy.</p></div>

Get matched with top air duct cleaners in New Underwood, SD

Enter your ZIP and get matched with up to 5 pros

TRUSTED BY NEW UNDERWOOD, SD HOMEOWNERS

4.6
Average homeowner rating
53
Verified air duct cleaning services reviews

Verified Reviews for Air Duct Cleaning pros in New Underwood, SD

*The Angi rating for Air Duct Cleaning companies in New Underwood, SD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Duct Cleaning needs.

*The HomeAdvisor rating for Air Duct Cleaning companies in New Underwood, SD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Air Duct Cleaning needs.

Last update on November 24, 2025

Reviewed in January 2024
Nic is very polite, clean, and very conscious about doing a great job. Tyler was great to work with as well.
Your Home Improvement Company, LLC
Request a quote
Reviewed in June 2023
They both cleaned the gutters and downspouts on the day we called. Worked quickly, efficiently and showed us before and after pictures.
Simpson Gutters & Repair
Request a quote
Reviewed in June 2023
The entire process was A++! From Ray being our salesman to the install team! Ray answered all our questions and was not pushy! The install team left the house cleaner then when they arrived! It was the best to come home to new windows and I did not have to clean up any of the mess!
Renewal by Andersen of Rapid City
Request a quote
Reviewed in April 2023
Very knowledgeable. Had our ac working the same day I posted on Angie.
Motif Properties
Request a quote
Reviewed in October 2022
Whenever we had a problem of our AC, or service needed we always call Bill and been using him over the years. He provides excellent job with fair price. We are very happy with him. We recommended him to my sister in law and she’s happy too with his service. Highly recommended to everyone. Wilma...
W.B. Koehler Air Conditioning LLC
Request a quote
Reviewed in November 2016
It went great! The gentleman who replaced the faucets was very professional and very efficient, plus he cleaned the sinks after he was done..
Action Mechanical Inc
Request a quote
Reviewed in May 2015
I contacted Quality Carpet Care based on the recommendations I saw on Angie's List. My original appointment with this company had to be postponed due to the 09/10 May 2015 late-season snowstorm. However, Gary (the owner of the business) called the day after the storm subsided and asked if he...
Quality Carpet Care
Request a quote
Reviewed in February 2012
She was very thorough and worth every cent. Jessica is energetic, brings her own cleaning items and took great care with our personal belongings. She was open to using my cleaning supplies, but after she arrived, I liked hers more so she uses hers instead. I trust her in my home. I am relieved...
Jessica Wise
Request a quote
Reviewed in August 2011
They did not replace the air filter or fuel filter as required.
Four Seasons Sport And Marine
Request a quote

Find Air duct cleaners in New Underwood

Second Nature (Formerly FilterEasy)

5.00(

)

Second Nature (Formerly FilterEasy)

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

Second Nature, formerly FilterEasy, empowers its members to achieve long-lasting, sustainable home wellness with convenient subscription plans, including high-quality home air filters and refrigerator water filters. We exist to simplify home wellness, to make it so easy and convenient that it becomes second nature. Learn about our products and subscribe at www.SecondNature.com/home.

Dyna Kleen

5.00(

)

Dyna Kleen

5.00(

)

Customers say: Quick response

Recommended by 100% of Angi customers

Here at Dyna Kleen, we take pride in providing the best services and satisfying our customer needs. We specialize in Cleaning Services, Boiler cleaning, Carpet cleaning, Dryer vent cleaning, Duct cleaning, Eco-friendly cleaning, Fire tube boiler cleaning, Furnace cleaning, Steam cleaning, Upholstery cleaning, Fire restoration, Smoke restoration, Water restoration and much more. We look forward to your business and serving you. Contact us today (605) 342-3993

"Dyna-Kleen did an excellent job at cleaning the entire HVAC air duct system throughout our house. They brushed and power vacuumed all 32 supply and return vents as well as cleaned the HVAC system itself, including the coils, plenum, fan, motor and cage. They brought in a very large and powerful vacuum system and long hoses to get the dust and gunk out of the duct system. The crew of three spent 4 hours on cleaning the entire duct network and HVAC system and did an extremely thorough job, including cleaning up any grime created by their work. They were all very professional, friendly and informative. They honored their quoted price which was the best of all the estimates we got. Great all around."

Frederic Z on June 2018

"Dyna-Kleen did an excellent job at cleaning the entire HVAC air duct system throughout our house. They brushed and power vacuumed all 32 supply and return vents as well as cleaned the HVAC system itself, including the coils, plenum, fan, motor and cage. They brought in a very large and powerful vacuum system and long hoses to get the dust and gunk out of the duct system. The crew of three spent 4 hours on cleaning the entire duct network and HVAC system and did an extremely thorough job, including cleaning up any grime created by their work. They were all very professional, friendly and informative. They honored their quoted price which was the best of all the estimates we got. Great all around."

Frederic Z on June 2018

Rapid-Air Heating & Cooling

1.00(

)

Rapid-Air Heating & Cooling

1.00(

)

24 years of experience

This company offers lite commercial and residential heating and air conditioning service and repair. Our main services are Commercial Air Conditioning Contractor, Heating installation & repair, Heating Contractor, Refrigerator Repair Service, HVAC Contractor. See more at: http://www.bbb.org/south-dakota/business-reviews/heating-and-air-conditioning/rapid-air-heating-and-cooling-in-rapid-city-sd-300083203#sthash.YF6fCSUa.dpuf

Global Plasma Solutions

5.00(

)

Global Plasma Solutions

5.00(

)

Customers say: Quality work

Recommended by 100% of Angi customers

Global Plasma Solutions is a manufacturing company that sells air purification systems primarily into the commercial and residential markets. Home owners can benenfit from our systems as they are easily adapted to any HVAC system. Go to www.gpshvac.com to find a certified contractor near you to have one installed within your home.

Stanley Steemer

4.43(

)

Stanley Steemer

4.43(

)

Customers say: Quick response

Free onsite estimate

Stanley Steemer has been providing cleaning and restoration services for both residential and business customers for more than 60 years. They offer multiple services, including carpet cleaning, tile and grout cleaning, hardwood floor cleaning, upholstery cleaning, air duct cleaning and water damage restoration services. For more information, visit www.stanleysteemer.com.

Environmental Testing & Research Laboratories, Inc

4.85(

347

)

Environmental Testing & Research Laboratories, Inc

4.85(

347

)

Customers say: True professional

Recommended by 93% of Angi customers

ETR Laboratories in an analytic laboratory with a broad range of commercial, industrial and individual clients. We provide analytic services using a wide variety of scientific methods including GC/MS, IC/MS, GIR, NMR and SEM equipment. We can do particle analysis, organic and inorganic chemical analysis and micro analysis on biological and other materials. Private water analysis is our specialty. Award winning. Additional DBA - Environmental Testing & Research Laboratories Inc, ETR Labs, ETR Laboratories.

"as advertised"

Nancy C on July 2018

"as advertised"

Nancy C on July 2018

Air Duct Cleaning questions, answered by experts

Damp air from a humidifier can cause mold in ducts if it raises the air's humidity level too high for the duct system to handle or malfunctions, but it’s not a normal occurrence. To avoid mold trouble, set the humidistat to between 30% and 35% and inspect it often to ensure accuracy.

Signs your ductwork needs cleaning include visible dust buildup, musty odors, increased allergy symptoms, and reduced airflow. If you see dust blowing from vents, find mold inside ducts, or notice a spike in your energy bills, it’s time for a professional inspection and cleaning to improve air quality and efficiency.

If air ducts aren’t regularly cleaned and maintained, your HVAC system will circulate dirty air through your home, affecting the air you breathe. Also, trapped moisture can lead to mildew and mold growth, particularly in regions with high humidity.

If you notice increased energy bills, poor airflow, or frequent HVAC system issues, a professional assessment is advisable. Technicians can identify duct leaks or inefficiencies that require updating or maintenance.

Turn your system off when you're toasty or when you're out to prevent unnecessary wear. Using the timer on your thermostat so that it switches off when it reaches a certain temperature or turns on just before you get back from work is best. An annual maintenance contract can be helpful to ensure your system receives these important services at regular intervals.

The New Underwood, SD homeowners’ guide to air duct cleaning services

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

See all articles

Deane Biermeier
•
Oct 28, 2025Oct 28, 2025
How Much Does a Whole-House Air Purifier Cost? [2025 Data]
Whole-house air purifier costs depend on a variety of factors, including your home’s size and layout. The type of purifier you choose matters, too.
Tyler Lacoma
•
Jun 12, 2025Jun 12, 2025
How Much Does Air Duct Cleaning Cost? [2025 Data]
Curious about air duct cleaning costs? Get insights into pricing factors, benefits, and how to tell when it’s time for a good cleaning.
Nick P. Cellucci
•
Mar 6, 2025Mar 6, 2025
How to Hire a Good Air Duct Cleaning Pro
Air duct cleaning is a service for homes affected by mold, pests, or excess dust. Use this guide to find a good air duct cleaning company.
Chris Middleton
•
Mar 14, 2025Mar 14, 2025
How to Keep Air Ducts Clean: 7 Simple Ways to Keep Your Air Ducts Clean Longer
If you want cleaner air in your home, you’ll want to keep an eye on your air ducts. Learn how to keep your air ducts clean with seven helpful tips for homeowners.
Kate Fann
•
Jul 30, 2024Jul 30, 2024
The Best Time to Clean Air Ducts: How to Plan Your Cleaning Schedule
Perhaps you want to clean your ductwork but aren't sure when is the best time to clean air ducts. We'll explain everything to help you get on the right schedule.
Catherine Hiles
•
Nov 20, 2025Nov 20, 2025
6 Common Air Duct Cleaning Methods for Healthier Air at Home
Regular air duct cleaning can keep the air quality in your home healthier. Learn about the most common air duct cleaning methods for removing debris, bacteria, and mold.