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>

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TRUSTED BY CORDOVA, AK HOMEOWNERS

4.8
Average homeowner rating
33
Verified air duct cleaning services reviews

Verified Reviews for Air Duct Cleaning pros in Cordova, AK

*The Angi rating for Air Duct Cleaning companies in Cordova, AK 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 Cordova, AK 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 17, 2025

Reviewed in August 2025
Overcharged me, didn't clean my tub, or take out the trash.
MOLLY MAID
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Reviewed in August 2019
We are retired and installing new ducts and central air conditioning was a big decision for us as far as investment. We had worked with Moore Heating and A/C here in Anchorage, AK before. We had wonderful service with them installing a new furnace so we decided to give them a try. Moore has a...
Moore Heating and Cooling
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Reviewed in July 2015
I live in a little "dip" that GCI refuses to recognize. People in this neighborhood have problems with dropped calls with their GCI cell phones. This area is where the Anchorage Senior Center is located. In my building people have to go outside to use their phones, when friends come to my...
GCI CABLE INC
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Reviewed in December 2014
We had just moved into this house and wanted the HVAC system and dryer vent pipe cleaned. The crew and equipment showed up at about 10 am and completed the work at 400 pm. Our house consisted of gas forced air heating system with 16 supply registers and 7 return registers. The house is four...
Alaska Power Vac LLC
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Reviewed in September 2014
Within a day or so of the cleaning my dogs started "marking" and the tech who came to clean the mattress cleaned up the "marking" spots. I'm thinking the dogs thought there was an "intruder" and had to reestablish the territory. Perhaps the odor of the cleaning solution caused this. I will...
J & S Steamway Carpet Cleaning
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Reviewed in March 2014
They said they were going to clean the air ducts through all the vents and had me show them all vents. However, after they left, I checked and found that they'd only removed a couple of vents.
Lowe's Air Duct Cleaning
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Reviewed in December 2013
Cleaned out a gutter.
Sunshine Window Cleaning
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Reviewed in December 2013
I had the work done several months ago, but waited until I finished the summer and got into colder weather to see how the system functioned before I wrote this review. Rocky Rocco came to the house to provde an estimate. He did a very thorough job and even climbed into the attic to make sure...
Aladdin Air Conditioning & Heating Inc
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Reviewed in November 2013
Prompt and on time, has assistant with him, did a good job of cleaning the carpet,
DNP Carpet Cleaning
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Reviewed in July 2013
Elmer was prompt, cleaned up all the debris, and if there are no leaks next winter, I will highly recommend him to others.
Roof Leak Services LLC
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Find Air duct cleaners in Cordova

Lorenzo Enterprises

4.95(

)

Lorenzo Enterprises

4.95(

)

Customers say: True professional

Recommended by 100% of Angi customers

A family owned and operated business in Anchorage, Alaska with over 25 years experience, bringing quality and dependability to each and every project that we take. We are Licensed Plumbers certified to install and connect all gas appliances. We stand behind our work 100%. Call for Quotes on any heating and plumbing repairs.

"Excellent."

William J on May 2019

"Excellent."

William J on May 2019

Moore Heating and Cooling

4.82(

137

)

Moore Heating and Cooling

4.82(

137

)

Customers say: Super punctual

Recommended by 94% of Angi customers

Moore Heating and Cooling is your go-to expert for all your heating and cooling service and repair needs in Anchorage. With our exceptional expertise and dedication to customer satisfaction, we stand out from the competition. Contact us today to experience top-notch service!

"Very responsive and quick to complete the job"

Julius C on July 2023

"Very responsive and quick to complete the job"

Julius C on July 2023

Air Duct Cleaning questions, answered by experts

Unfortunately, you probably don’t have much legal recourse if you think you’ve been scammed by an air duct cleaning company, but there are some actions you can take. Your first order of business should be to report the issue to the Better Business Bureau (BBB). Your complaint will show up to other customers doing research and, ideally, prevent the scammer from getting to other homeowners. You can also leave a negative review on online review sites. If you got scammed out of a large amount of money, you may want to seek legal counsel for advice.

You can keep your air vents working properly by regularly cleaning them and replacing any air filters as necessary. Your air vents will also work best if you clean and lubricate the exhaust fans and reduce humidity to prevent condensation on them.

Some homes in warmer locations have air vents in the ceiling because they do a better job of cooling than floor vents. This is because hot air rises and cool air sinks. Homes located in cooler climates tend to have vents in the floor because they do a better job of delivering warm air, which rises.

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.

High humidity is one of the most common reasons for air vents to sweat or produce condensation. When the cool, dry air from your HVAC unit meets warm and moist air in your home, it will cause condensation. Insulating your ductwork can help prevent this. If you live in a very humid region, a dehumidifier can also help.

The Cordova, AK 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

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Oct 28, 2025Oct 28, 2025
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Preparing for air duct cleaning will make the job go much smoother. Learn about the steps you should take before a pro starts cleaning your ducts.
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Can air duct cleaning cause damage to your home’s duct system? Yes, if it’s done incorrectly. Here’s how to prevent that from happening.
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•
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Notice debris coming out of air vents in your home? Explore common causes of debris in air vents and what you can do to keep the vents clean.