As an expert in the HVAC industry, I have seen the benefits of using UV lights for disinfection and improving indoor air quality. These lights are a popular choice for homeowners looking to keep their homes free from mold, bacteria, and other airborne contaminants. However, many people are unsure about how often these lights should be used and whether they should be on all the time. In this article, I will share my knowledge and experience on the topic to help you make an informed decision. Most manufacturers recommend replacing the UV lamp every 9000 hours or approximately every 12 months.
This is because the effectiveness of the light decreases over time, making it less effective in killing harmful microorganisms. For those with allergies and respiratory conditions, an annual replacement program is highly recommended to ensure that the UV lights continue to keep the indoor air healthy. UV lights are most effective when directed at areas where moisture can accumulate, such as condensers and coils. These lights must be on continuously to be effective, which is why regular replacement is necessary. By preventing mold and bacteria from growing in these moist components of air conditioning systems, UV lights also prevent them from circulating through the indoor air of your home.
From my experience, I can say that the effectiveness of UV sterilization depends on the intensity of light hitting the source of contamination, the power of the UV lamp, and the contact time. Unlike traditional UV disinfection systems that operate 24 hours a day, newer automated systems deliver UV light based on HVAC usage. This means that the lights are only on when the HVAC system is running, making them more energy-efficient. However, just like any other bulb, UV lights have a limited lifespan and need to be changed regularly to maintain their effectiveness. If you need more information on UV lights and other clean air solutions for your home, I recommend contacting Scott's Heating & Air Conditioning. One common question that arises when discussing UV lights is whether they are effective in reducing mold and bacteria in the air that circulates through UV-illuminated ducts.
While there is no definitive answer to this question, it is likely that a series of lights would need to be placed throughout the ducts for sufficient contact and effectiveness. This is why regular replacement of UV lights is crucial to ensure that they continue to provide clean indoor air.
