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>

Get matched with top air duct cleaners in Calais, VT

Q: Why does my whole house smell like cat pee?

• <div><p>Cat pee has a strong ammonia-like smell, so if you smell cat pee but don&rsquo;t have a cat or don&rsquo;t suspect your cat has any accidents, there could be other issues at hand. Aside from pet urine, your house may smell like cat pee from leaking freon from an old fridge, mold, spilled cleaning supplies, or even outside odors from nearby farms. </p></div>

Q: What happens if I don't clean my AC?

• <div><p>A non-maintained AC is more likely to perform poorly, increase your energy bills, and undergo more severe issues like breakage and water damage. That&rsquo;s why DIY cleaning or professional maintenance is recommended annually. Otherwise, you might end up paying more in the end than you would for annual service. You can purchase cheap AC cleaning kits if you prefer going the DIY route.</p></div>

Q: Should cold air return vents be covered?

• <div><p>Air vents should never be blocked. It can disrupt the airflow in your home and make rooms too stuffy, hot, or cold. If the vents are blowing out cold air when you want hot air, covering the return vents won't solve the problem. You either have a dirty air filter, furnace problems, or, more than likely, leaky air ducts that need sealing.</p></div>

Q: What are the warning signs of not enough return air?

• <div><p>The first sign you're not getting enough return air is if some parts of your home feel hotter or colder than others. If nothing else is causing that, leaky air ducts are your next clue. If the air pressure feels different in every room, this is also usually a sign of insufficient return air.</p></div>

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Verified Reviews for Air Duct Cleaning pros in Calais, VT

*The Angi rating for Air Duct Cleaning companies in Calais, VT 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 Calais, VT 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 10, 2025

Reviewed in June 2025
Our neighbor is using them to make a patio, soon our home filled with white dust and it coveted our lawn. The workers informed us they were not using any water or dust suppression methods as required by OSHA. We told them we were concerned about our exposure to silica, a cause of potentially...
ATD Landscaping LLC
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Reviewed in October 2024
Do not work with LESA. I am the first to write a positive review and try my best to avoid negative, but LESA's negligence has cost my family $26,000 in unexpected repairs after our home purchase. Choose a different inspector. First, our entire basement ceiling/floor system was contaminated...
LESA Inspections
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Reviewed in March 2024
Great group of professionals, I would highly recommend them to anyone in need of tree work and clean up.
Sky High Tree Service
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Reviewed in December 2022
Quality couple. Responsible. Reliable. Pleasant. And outstanding professional cleaning. Highly recommend Annas Cleaning!
Northshire Cleaning
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Reviewed in July 2013
Carmine's just finished a job at our home replacing two air conditioning systems (outside compressors as well as air handlers). Here were the pros and cons: PROs --Best price of the 3 quotes I obtained --Salesman (Pete) was terrific. Knowledgeable, professional, friendly, no-pressure,...
Carmine's Plumbing, Heating & AIr Conditioning
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Reviewed in November 2012
John was very punctual, efficient, and very easy to work with. He cleaned up after himself, and left the job site in good condition.
John Clark Electric
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Reviewed in December 2008
Terrific experience. Yuri and his colleague are highly professional. They called to let us know they were running slightly late, did a walk-through of the house, inserted a camera to show us the amount of muck in the ducts, and got to work. Yuri's colleague removed the registers and washed them...
PYM Llc
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Reviewed in June 2008
Joel came on time and was well versed in radon mitigation. He was quick, efficient and clean. The system was installed correctly and functions well.
MOUNTAINVALLEY BUILDING INSPECTIONS INC
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Find Air duct cleaners in Calais

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.

Green Home Solutions of Vermont, LLC

No reviews yet

Green Home Solutions of Vermont, LLC

No reviews yet

11 years of experience

Green Home Solutions of Vermont, LLC is an owner operated business that provides effective, affordable, responsible, natural, and safe solutions for mold, odor, allergen, bed bug, mosquito, and tick elimination. We offer free healthy home audits and free estimates and our work is 100% guaranteed.

Cleanway Services

3.00(

)

Cleanway Services

3.00(

)

Customers say: Quick response

41 years of experience

Cleanway Services provides comprehensive restoration services for residential and commercial structures damaged as a result of fire, smoke, and/or water. Our highly skilled and IICRC certified technicians are able to respond to your damage needs in Vermont and New Hampshire within hours. No matter how big or small the damage is, we are committed to restoring your home or business. In addition we offer green carpet cleaning and janitorial services to keep your home clean and free of allergens and odors. If you drop off your rug at our St Johnsbury location we can clean that too!

"BEN &his STAFF BEST CLEANING SERVICES, CLEANWAY SERVICES, PROFESSIONAL, EXCELLENT CUSTOMER SERVICE &PERFORMANCE SERVICES.HIGHLY RECOMMENDED A++++I ONLY RECOMMEND CLEANWAY SERVICES. We moved to this 4yr old home NH 2015 and all been sick even RESCUE ANIMALS. Jan2018, I was incapacitated, dizzy, in&out çonsciousness thinking flu???my rescue CATS howling PAWING acting like never b4.I already am disabled hospital bedridden and my bedroom above oil FURNACE room.We didn't know but FURNACE FIRE oil soot CARBON MONOXIDE (none of detectors went off BC dummies,electric not REAL wires).CLEANWAY SERVICES,ABSOLUTE RESOURCES (MOLD),yes mold SEVERAL all over&affected our health detrimental 2us&animals, LIBERTY MUTUAL EXCELLENT. I KNOW MOLD NOT COVERED BY INSURANCE yet everything with OIL SOOT had MOLD. Despite central exchanger, central ionizer,12 HEPA Uv air filtration units for home 2000sqft, several MOLDS DESTROYING 38yrs of memories and collectibles can't replace.BEN&STAFF AT CLEANWAY SERVICES ALWAYS ACCOMODATING PROFESSIONAL SUPERB SERVICES.DONT HIRE ANYONE BUT CLEANWAY SERVICES esp.Ben &staff VT"

Toula G on April 2018

"BEN &his STAFF BEST CLEANING SERVICES, CLEANWAY SERVICES, PROFESSIONAL, EXCELLENT CUSTOMER SERVICE &PERFORMANCE SERVICES.HIGHLY RECOMMENDED A++++I ONLY RECOMMEND CLEANWAY SERVICES. We moved to this 4yr old home NH 2015 and all been sick even RESCUE ANIMALS. Jan2018, I was incapacitated, dizzy, in&out çonsciousness thinking flu???my rescue CATS howling PAWING acting like never b4.I already am disabled hospital bedridden and my bedroom above oil FURNACE room.We didn't know but FURNACE FIRE oil soot CARBON MONOXIDE (none of detectors went off BC dummies,electric not REAL wires).CLEANWAY SERVICES,ABSOLUTE RESOURCES (MOLD),yes mold SEVERAL all over&affected our health detrimental 2us&animals, LIBERTY MUTUAL EXCELLENT. I KNOW MOLD NOT COVERED BY INSURANCE yet everything with OIL SOOT had MOLD. Despite central exchanger, central ionizer,12 HEPA Uv air filtration units for home 2000sqft, several MOLDS DESTROYING 38yrs of memories and collectibles can't replace.BEN&STAFF AT CLEANWAY SERVICES ALWAYS ACCOMODATING PROFESSIONAL SUPERB SERVICES.DONT HIRE ANYONE BUT CLEANWAY SERVICES esp.Ben &staff VT"

Toula G on April 2018

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

Cat pee has a strong ammonia-like smell, so if you smell cat pee but don’t have a cat or don’t suspect your cat has any accidents, there could be other issues at hand. Aside from pet urine, your house may smell like cat pee from leaking freon from an old fridge, mold, spilled cleaning supplies, or even outside odors from nearby farms.

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.

A non-maintained AC is more likely to perform poorly, increase your energy bills, and undergo more severe issues like breakage and water damage. That’s why DIY cleaning or professional maintenance is recommended annually. Otherwise, you might end up paying more in the end than you would for annual service. You can purchase cheap AC cleaning kits if you prefer going the DIY route.

Air vents should never be blocked. It can disrupt the airflow in your home and make rooms too stuffy, hot, or cold. If the vents are blowing out cold air when you want hot air, covering the return vents won't solve the problem. You either have a dirty air filter, furnace problems, or, more than likely, leaky air ducts that need sealing.

The first sign you're not getting enough return air is if some parts of your home feel hotter or colder than others. If nothing else is causing that, leaky air ducts are your next clue. If the air pressure feels different in every room, this is also usually a sign of insufficient return air.

The Calais, VT homeowners’ guide to air duct cleaning services

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