We know that mold and bacteria are very harmful particles, and when it enters the HVAC system, the damage is uncontrollable. UV light protect us and owners must know that contaminants multiply and infect the air quality. This can have serious impacts on the health and wellbeing of people. So, what is the way out? In this technological era, UV lights are gaining increased popularity. This gives rise to the question; can UV lights protect us from bacteria in ducts?
People use ultraviolet lights to disinfect the air and HVAC unit. Knowing its effectiveness for the said purpose will define its worth.
Does Ultraviolet Lighting Effectively Kill Microorganisms?
For the past 100 years,
ultraviolet lightning is a proven source of killing harmful microorganisms such
as
- Mold
- Viruses
- Bacteria.
Medical practitioners also use it for treating skin infections. Hence, these lights are widely used in medical
centers, eateries, and grocery stores.
Apart from this, UV light is also highly effective in killing and disinfecting HVAC systems. Here are some researches that proves the comment.
- Research conducted at Duke University Medical Centre revealed that ultraviolet lighting
successfully killed 97% of the bacteria and super germs. - According to Applied and Environmental Biology, the bactericidal UV radiation notably reduced mid-air fungi in ACs.
Effectiveness on Coronavirus
- UV bactericidal lights have the power to kill many kinds of germs.
- As per the USA Centre for Disease Control and Prevention, UV radiation and humid heat are the most promising sanitization methods.
- Testing is still in the initial stages; however, they expect positive results from it.
Type of Ultraviolet Radiation Used in Heating and Cooling Systems
The type of UV radiation integrated into the HVAC units is as follows:
- Ultraviolet Radioactivity Lights: It has the ability to kill the COVID-19 virus. The Centre for Disease Control and Prevention (CDC) advises that the intensity of the light and time duration affects killing coronavirus effectiveness.
Experts recommend that we must not take our health safety for granted. The best way is to consider installing UV Light In Duluth, GA.
UV Light Variety for HVAC Unit
Experts recommend two types of UV
radiation for disinfecting your HVAC system. Some of the common names include:
- Cleansing lights
- Bactericidal lights
- Disinfecting lights
- Purification lights.
Coil Sterilizing Lights
One of the most important components of an HVAC system is the indoor coil. It is a key location where mold
and bacteria can grow. Here is how mold grows in the coil:
- The function of the coil is to condense humidity from the air to dehumidify the surroundings while operating.
- As air moves over the coil, dirt and debris tend to stick to the damp sides.
- The damp sides act as breeding grounds for mold.
Coil UV lighting is the most frequently used HVAC sterilizing lights. The most commonly used lights are:
- Single-lamp
- Dual-lamp models
- Both types of lights are readily available in market.
Air Disinfection Lights
Air Disinfection Lights integrates into the ductwork that transports air into the unit. Their purpose is to kill mid-air germs and mold particles. Some of the variations include
- Stick
- U-shaped lamps
A few of the HVAC disinfection lights that synchronize with the blower motor.
Do-It-Yourself Installation
If you have basic knowledge of electrical equipment, then you can easily save installation costs. You can follow the instructions mentioned below.
- The majority of the ultraviolet lighting for HVAC systems come with an 110V power switch.
- A few versions come with a magnetic mounting bracket that allows quick and easy installation.
- The procedure needs to access the coil cabinet or air duct.
- You can use sheet metal screws to fix the light that does not have a magnetic bracket or plug.
Extra Benefits
Bacteria and fungus cause two additional issues which are as follows:
- Unpleasant odors
- Accumulation of microorganisms.
When this happens, the Air Conditioning unit is likely to leak. It not only enhances the probability of mold and contaminants growth but also causes water damage.
Is Ultraviolet Lightning for Heating and Cooling Unit Worth It?
When you plan to get, the bactericidal lights installed in the HVAC system. You will have to bear four types of costs: fitting cost, installation cost, replacement cost, and energy cost. The costs estimates are below:
| Type | Fitting Cost | Installation Cost | Replacement Cost | Energy Cost |
| Coil Sterilizing Lights | $60 – $285 | $100 – $225 | $10 – $60 | $15 – $30 |
| Air Disinfection Lights | $80 – $400 | $150 – $295 | $15 – $125 | $15 – $30 |
The lamp life spans from 9 to 14 months for all famous brands. So, you can expect an average spending of $15 – $50 each year for the new lamps. After choosing the lights, you can expect $45 to $70 yearly on the energy cost. So, the question arises that is it worth it?
The answer is yes. The reason is that health is the most valued asset of every person. If any of your household members suffer from any of the following issues then these sterilizing HVAC ultraviolet lights are a must-have:
- Respiratory issues,
- Allergies
- Viruses
- COVID-19.
While HVAC lights can be a good
solution, you should never ignore the system’s regular cleanliness and
maintenance. Some of the tips to follow include:
- Getting your heater, air handler, and coil thoroughly cleaned by a professional
- Sealing ducts to avoid infiltration of the germs
- Consult your technician if a high-MERV filter is appropriate for your heater or air handler. If yes, then get one installed.
- Installation of a UV Coil Light can help prevent the bacteria and fungi growth within the system
- A UV air disinfection light can be helpful for serious ductwork issues
- Timely replacement of AC filters is recommended
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