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Q.
I had a reputable company come to do air duct cleaning and they said there
was mold in the hvac - therefore risky to do the cleaning because mold
spores may go to other parts of the house. They use fosters 40-20 as
remediation and will charge an extra $1100 to treat everything with it.
The mold they showed me was growing on the vent in our bedroom and I was
advised to get a new vent- the other vents aren't so bad so they will be
cleaned and treated. What do you think of all this? [December 18, 2004]
A. The U.S. Environmental Protection Agency [EPA] discourages
duct cleaning because its benefit is only short-term and it cannot reach
all mold and other contaminants living in the ducts and the
heating/cooling system. If your heating/cooling system is mold
contaminated, so is the rest of your house because the heating/cooling
system is very good at distributing airborne mold spores everywhere in
your home by its very operation of moving air to every area of your house.
In addition, the most likely reason that your heating/cooling system is
mold contaminated is that it was cross contaminated from one or more mold
problems in the rest of your home. The operation of the system sucked in
airborne mold spores from mold contamination sites to mold
cross-contaminate the heating/cooling equipment and ducts. Your first step
is to have the home thoroughly inspected and tested with a
Certified Mold Inspector. Then mold remediate your entire home and the
heating/cooling system at the same time. Learn the 25 steps for safe and
effective
mold remediation.
Q. I live in a town home in
Woodbridge VA and just had my Fall Heater inspection. We found major amounts of black
mold inside the Carrier Air Handler that was not there in March. The inspector first
thought that maybe we could remediate it with ultraviolet light, but after considerable more
checking said that it was too extensive and the unit would have to be replaced since it
circulated air all through the house. Is there no other means of killing mold inside a
HVAC unit? [October 12, 2004]
A.
When there has been mold cross contamination of your entire house by a moldy heating/cooling
system you need to mold remediate your ENTIRE house. Your first step is mold testing by using
our do it yourself mold test kits to mold test your entire home for mold infestation. Test the
air of any attic/basement/crawl space, garage, each room, and the outward air flow from each
heating/cooling duct register for the possible presence of elevated levels of airborne mold
spores, in comparison to your outdoor mold control test.
Use
do-it-yourself mold test kits [available from your local large hardware,
home improvement, or safety store].
You should also collect samples of any visible mold for mold lab analysis
and mold lab mold species identification by using the Scotch tape lift
sampling technique explained on the mold test kit instructions of
Mold Mart.
Collect a different mold sample from each different mold growth location. Learn safe,
effective
mold remediation
tips.
You can use also a low-cost Mold Home Remedy Recipes available at
Mold Mart
. The
only perfect solution is the total replacement of your heating/cooling ducts and equipment
after effective
mold remediation of the rest of your house. You should test your home for
levels of mold infestation in the heating/cooling system both before and after fogging
a
home mold remedy
into your heating/cooling system. Your family needs to be out of the home during the fogging and spraying process [until
the mold fog and spray are totally dried].
Q.
How do we know whether it
is necessary to replace the ducts and the air handler because of mold contamination in my
home? [Sept. 5, 2003]
A.
You need to know how seriously and
where your home [including all of your heating/cooling equipment and ducts] is mold
contaminated. Your first step to solve the problem is to mold test the air of each room,
basement, crawl space, attic, and the outward air flow from each heating/cooling duct register
for the possible presence of elevated levels of airborne mold spores, in comparison to an
outdoor mold control test. Elevated mold levels signify a possible serious mold infestation
problem and health threat. To use our do it yourself mold test kits, please visit:
Mold Mart Hire a
Certified
Mold Inspector. To know how to do mold remediation safely and effectively, please visit:
Mold Removal. Before mold cleaning or replacing the the heating/cooling equipment
and ducts, they should be first sealed [using plastic to tightly cover all return air
registers and supply registers to stop any further mold contamination of the heating/cooling
system. Then you would first complete mold remediation of all other areas of your house,
including your personal property and clothing which should be mold decontaminated outside of
the house in the clean room you can build pursuant to the instructions in our book
Mold Health
Book [Mold Mart]. Then you would
use containment walls to seal off the mold remediated areas from the work that needs to be
done on heating/cooling equipment/ducts. If the ducts are made of sheet metal [with NO
insulation INSIDE the ducts], the sheet metal interiors can be effectively cleaned and
disinfected with mold fungicides. If the ducts contain insulation INSIDE or are something like
corrugated pipes, throw those ducts away and replace with new ducts.
Mold growth in air conditioning register duct.
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Mold growth on outside of air conditioning duct register. |
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Mold growth
inside air conditioning duct behind the register
shown in the photograph above. |
Q.
I am in the process of replacing
old ceiling vents with new ones. When I opened up one vent I found what I
can only conclude is mold in the area above the vent and in the duct from
the HVAC. I have turned the heat up 87 to see what that will do. Before I
put on the new vents, what should I do? Should I try to remove the mold
and if so, how? Will the dry heat do the trick, or is there a solution
that can be sprayed on the surfaces? I am afraid that this is not the
only duct to have this problem. [Nov. 1, 2004]
A.
When you have mold growth in your heating/cooling system, you are going to
have mold cross contamination in your entire home, courtesy of the air
movements of the heating/cooling cycle. Your first step should be in depth
do it yourself mold testing of your entire home as well as each
heating/cooling duct [explained below]. As to mold remediation, you need
to mold remediate mold problems in your home before you mold remediate the
heating/cooling system [the duct registers of which should be sealed off
with plastic sheeting on all ducts during mold remediation of the house].
Of course, the best but most costly approach is to replace your entire
heating/cooling equipment and ducts with new ones after your home is
entirely mold-safe due to mold testing and any needed mold remediation.
Your second choice is to use the
mold fogging machine to fog substantial amounts of both a
fungicide [to kill current mold growth] and an antimicrobial coating [to
protect the ducts and equipment against future mold growth]. You would fog
the homemade fungicide and homemade antimicrobial coating into the return
air duct while your entire system is running on fan ventilation. Learn how
to make your own low-cost fungicide and low-cost antimicrobial coating by
reading our Special Report
Mold Killer Recipes &
Instructions, available at our
online mold products catalog. As to mold
testing, Please use our do it yourself mold test kits to mold test your
entire home for mold infestation both before and after mold remediation
efforts. Most mold removal efforts fail because of the failure to follow
the 25 steps required for safe and effective
mold remediation. Test the
air of any attic/basement/crawl space, garage, each room, and the outward
air flow from each heating/cooling duct registr for the possible presence
of elevated levels of airborne mold spores, in comparison to your outdoor
mold control test. You can buy
mold test kits at
the
online mold products catalog. You should also collect samples of any
visible mold for mold lab analysis and mold lab mold species
identification by using the Scotch tape lift sampling technique explained
on the mold test kit instructions published in the
mold test kit section. Collect a different mold sample from
each different mold growth location. You can use our very helpful
self-analysis forms to compare indoor mold test VISUAL RESULTS with the
outdoor mold control test visual results---or send your mold test
samples for skilled mold lab analysis and
mold species identification.
Become your own effective mold expert to improve your personal home or
apartment environmental safety and/or the environmental health of your
investment properties by reading all three of our mold advice, email
delivered books [Mold Health Guide, $49; Mold Legal Guide,
$49; and Do-It-Best-Yourself Mold Prevention, Inspection, & Remediation,
$49] for just $98 [you save $49], the price of only two of these valuable
“how to” manuals when your purchase through this special link
PayPal or on our
online mold products catalog. Please
note that our PayPal email payee address is
envirodangers@yahoo.com.
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Mold Inspector Websites
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Mold Inspector
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