UV-C germicidal lights installed inside your HVAC system continuously neutralize bacteria, viruses, mold, and other biological contaminants — without chemicals, filters, or ongoing cartridge costs. All Seasons installs UV air purification systems for Long Island homes and businesses.
We recommend the right UV system for your home
UV-C germicidal technology has been used in hospitals, water treatment facilities, and laboratories for decades. It works by emitting ultraviolet light at a specific wavelength — 254 nanometers — that is uniquely effective at disrupting the DNA and RNA of microorganisms, preventing them from reproducing or causing infection.
When installed inside your HVAC system, a UV-C lamp continuously irradiates passing air or the system's internal surfaces — neutralizing biological contaminants with every operating cycle, automatically, 24/7. Unlike filtration, UV-C doesn't capture particles: it deactivates the biological organisms that filters leave alive on their surface.
This makes UV-C complementary — not a replacement — for filtration. Filters capture particles including pathogens; UV-C neutralizes the biology of what passes through or accumulates on surfaces. Together, they provide comprehensive biological protection that neither delivers alone.
UV-C systems for HVAC come in two configurations, each targeting a different problem. Many Long Island homeowners benefit from both.
A UV-C lamp installed to continuously shine on your evaporator coil and drain pan — where mold and biofilm accumulate in Long Island's humid climate
A high-intensity UV-C system installed in the return duct or air handler that treats moving air as it passes through — targeting airborne pathogens in the circulating air stream
For most Long Island homes, we start with a coil irradiation system — preventing the mold that Long Island's humid summers almost guarantee on unconditioned evaporator coils. For health-sensitive households, we add an air-stream system for comprehensive coverage. Both types together typically cost $400–$900 installed, depending on system configuration and accessibility.
Common household bacteria — including Staphylococcus, Streptococcus, E. coli, and Legionella — are highly susceptible to UV-C irradiation. UV disrupts their DNA, preventing reproduction and colonization.
Many airborne viruses — including influenza, respiratory syncytial virus (RSV), and coronaviruses — are susceptible to UV-C inactivation. UV-C damages viral RNA, preventing replication and infection.
Mold growth on evaporator coils is one of the most common and damaging HVAC problems in Long Island's humid climate. Coil UV systems prevent mold establishment; air-stream systems neutralize circulating spores.
Long Island summers are genuinely humid — consistently 70–90% relative humidity from June through September. Your air conditioner's evaporator coil is cold, wet, and dark: a near-perfect environment for mold and bacterial biofilm growth. Most Long Island homes without UV protection develop some degree of coil contamination within two to five years of installation.
Coil contamination isn't just an air quality problem — it's an efficiency problem. Biofilm buildup on heat exchange surfaces measurably reduces heat transfer efficiency, forces longer run cycles, increases energy consumption, and eventually leads to more expensive repairs.
We assess your HVAC configuration, recommend coil irradiation, air-stream irradiation, or both — then install and verify correct UV-C dose for your system.
