Yup , its a fact about 50% of house dust is made up of dead skin cells, hair and microbes
from people and pets.
These Particles can blow out the vents every time the fan kicks on.
Bacteria wont typically live on clean metal surfaces but give it a layer of dust, a bit of humidity and some heat and now you could have the perfect petri dish living in your ducts.
Modern Furnaces are complex machines with Reheat Coils, a heat exchanger, Blower fan , motors and extremely sensitive control parts and sensors and none of these things like dust built up on them.
Its also important to note : planned service contracts with your local HVAC company generally do not include cleaning the furnace, usually they just change out the filter.
The coils get plugged up with dirt, lint, cooking oils, smoke, hair, dead skin, drywall & saw dust.
Plugged Coils slow down airflow and cause your
furnace to run longer to heat & cool your home.
New Modern Furnaces with coils need cleaning more often, usually every 2- 3 years depending on your home.
Residential and Commercial furnace cleaning: fan, motor, heat exchanger and burners are all cleaned inside the furnace as well as all of the hot air ducting and cold air returns. Sanitization and deodorizing are also included.
Residential and Commercial air duct cleaning: All of the hot air ducting and cold air returns are thoroughly cleaned out. This also includes air conditioner coil cleaning. Sanitization and deodorizing are also included.
Residential and Commercial dryer vent cleaning: This includes any size of residential and commercial building. Side of building or rooftop venting. Cleaning is done from the outside of the structure, extracting lint to the outdoors.
Residential and Commercial bathroom duct cleaning: Vent covers are removed and the motors are cleaned out. Air is then blown through to clean any remaining debris out of the exhaust tube(s).
FAQS
You should always make sure your furnace and ducts are cleaned right after construction or renovations , then usually every 3 to 5 years after that. If you have pets with a lot of hair or someone suffers from asthma or is sensitive to dust particles in the air then you may consider having your system cleaned more often.
Its very Critical that Professional Air Duct Cleaners use the right equipment and methods. The equipment needs to consist of a high powered vacuum system ( Portable or Truck-mounted ) which always uses 8" or larger hoses along with a high powered air compressor with a min 175 PSI and 20 CFM.
If a duct cleaner shows up using a shop vac with spinning brushes, carpet cleaning vac or a "house central vac system" on wheels then that is the wrong equipment and the wrong method for professional duct cleaning.
A Professional duct cleaner will tie into the duct system with the large high powered vac system ( 8" to 10" wide hose ) and with the vacuum pressure sucking they will blast compressed air into the vents and ducting to push dust and debris back to the vacuum. After all the ducts are blown the furnace itself must be cleaned such as the blower , reheat coils , burners, heat exchanger, and AC coils. The entire system from the ducts to the furnace must be cleaned.
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