What causes musty smells?

• <div><p>Figuring out why you have a musty smell in your house is the first step to getting rid of it. <a href="https://www.angi.com/articles/mold-vs-mildew.htm">Mold or mildew</a> is most likely causing the unpleasant odor. People use these terms interchangeably, but they’re actually different.</p><p>Mold is a fungus that loves to grow in moist, humid places. It’s typically black or green and has a raised, uneven texture. Stay vigilant for <a href="https://www.angi.com/articles/signs-mold-might-be-growing-your-home.htm">signs mold may be growing in your home. </a></p><p>You’ll find mildew growing on your shower walls and in your bathroom’s nooks and crannies. It’s a specific type of mold that grows flat. Mildew is usually white, gray, or yellow.</p></div>

How do I know if my HVAC damper is open or closed?

• <div><p>There should be a lever outside the duct that you can open and close. In the horizontal position, it’s open, and in the vertical position, it’s closed.</p></div>

Get matched with top air duct cleaners in Mountain View, HI

Q: Why are there so many air duct cleaning scams?

• <div><p>Air duct cleaning scams are, unfortunately, so common because the industry is largely unregulated, and technicians don&rsquo;t need to hold licenses in most states. It&rsquo;s also easy for scammers to use scare tactics to claim that your indoor air is potentially unsafe, which makes the service an easy sell. Finally, most homeowners don&rsquo;t have access to their hidden HVAC ducts and can&rsquo;t check on issues themselves, so it&rsquo;s easy to claim that there&rsquo;s mold or debris build-up in there and have it go unchecked.</p></div>

Q: What is the most common cause of poor airflow in a duct system?

• <div><p>For most homes, the common causes of poor airflow in a duct system are blockages, typically from dust, debris, or buildup. Other factors include leaky or disconnected ducts, improper duct sizing, and clogged air filters. These issues restrict airflow, reducing HVAC efficiency.</p></div>

Q: Should supply air be equal to return air?

• <div><p>Yes. Your air supply should be balanced. The return and supply ducts need to maintain that balance, and this only occurs because an equal amount of air should be entering and leaving your HVAC system. Changes in pressure, extreme weather, and blocking vents with furniture or your stuff can make the air supply unbalanced and cause your home to get too cold or hot.</p></div>

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Verified Reviews for Air Duct Cleaning pros in Mountain View, HI

*The Angi rating for Air Duct Cleaning companies in Mountain View, HI 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 Mountain View, HI 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 December 06, 2025

Reviewed in October 2024
(Gutter Cleaning)
Abrojena Holding Company
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Reviewed in November 2023
Got the ac up in a day now our hose is cool year around
Reliable Repairs Hawaii
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Reviewed in November 2023
A-Tech Plumbing & Drain Cleaning was a pleasure to work with. They were punctual, answered the phone when I called, showed up when they said they would and offered great solutions to my plumbing problems. They were professional in their communication and quality of work. I highly recommend...
A-Tech Plumbing & Drain Cleaning
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Reviewed in May 2023
They clean for us each week, and do a great job??
Judys Janitorial
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Reviewed in December 2022
Mark was responsive and honest. His team came out and did a great job. He helped us with the pricing and got us a fair price on great equipment. It is never easy to purchase two new AC units for your home, but Coolmark made it as painless as possible.
Coolmark Heating & Air
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Reviewed in June 2019
Great! This was the first job Phil did for us, he was prompt, clean and careful with details.
Platinum Remodeling & Handyman Services
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Reviewed in January 2018
Ian is punctual, professional, and a delight to have in my home. A former general contractor, he now specializes in cleaning windows for homeowner, commercial, and industrial clients. He has all equipment to reach all my windows, some of which are 35' high. He wears shoe protectors when inside....
The Window Guy
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Reviewed in December 2016
Francisco was absolutely great. He was on time, professional and very nice to work with. He took the time to carefully clear not only the ducts and vents but he also the area around each vent. I would highly recommend
FGglobal services
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Reviewed in June 2014
Twin Cities furnace cleaning contacted me within an hour of purchasing the cleaning special to schedule the cleaning. We had just replaced our furnace and a/c and wanted to start off clean. We were able to schedule the cleaning within a week. The service guy showed up pretty much right on time...
Twin Cities Furnace Cleaning Inc
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Reviewed in September 2009
I called JW to look at our AC ducts because the air in our bedroom was not as strong as it used to be. The repairman arrived on time and asked where the HVAC unit was. I showed him and he looked at the unit and pulled off the filter to show me that it was dirty and had some broken parts. He...
JW Plumbing, Heating & Air
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Find Air duct cleaners in Mountain View

Having a well-functioning HVAC system is essential for any Island Of Oahu property owner. For all of your HVAC needs, trust the professionals at Consolidated Systems.

Stanley Steemer - Waikoloa

4.50(

)

Stanley Steemer - Waikoloa

4.50(

)

Customers say: Quick response

Recommended by 100% of Angi customers

See website for more service areas

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.

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

Figuring out why you have a musty smell in your house is the first step to getting rid of it. Mold or mildew is most likely causing the unpleasant odor. People use these terms interchangeably, but they’re actually different.

Mold is a fungus that loves to grow in moist, humid places. It’s typically black or green and has a raised, uneven texture. Stay vigilant for signs mold may be growing in your home.

You’ll find mildew growing on your shower walls and in your bathroom’s nooks and crannies. It’s a specific type of mold that grows flat. Mildew is usually white, gray, or yellow.

Air duct cleaning scams are, unfortunately, so common because the industry is largely unregulated, and technicians don’t need to hold licenses in most states. It’s also easy for scammers to use scare tactics to claim that your indoor air is potentially unsafe, which makes the service an easy sell. Finally, most homeowners don’t have access to their hidden HVAC ducts and can’t check on issues themselves, so it’s easy to claim that there’s mold or debris build-up in there and have it go unchecked.

There should be a lever outside the duct that you can open and close. In the horizontal position, it’s open, and in the vertical position, it’s closed.

For most homes, the common causes of poor airflow in a duct system are blockages, typically from dust, debris, or buildup. Other factors include leaky or disconnected ducts, improper duct sizing, and clogged air filters. These issues restrict airflow, reducing HVAC efficiency.

Yes. Your air supply should be balanced. The return and supply ducts need to maintain that balance, and this only occurs because an equal amount of air should be entering and leaving your HVAC system. Changes in pressure, extreme weather, and blocking vents with furniture or your stuff can make the air supply unbalanced and cause your home to get too cold or hot.

The Mountain View, HI homeowners’ guide to air duct cleaning services

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