Your AC Is Circulating More Than Cool Air
Every air conditioning system in Carencro shares the same problem: the evaporator coil sits in a dark, sealed compartment and stays wet with condensation for the majority of the year. In Lafayette Parish’s climate, where summer stretches from April through October and humidity rarely drops below 70 percent outdoors, that coil is essentially a petri dish. Mold, mildew, bacteria, and algae establish colonies on the coil surface and in the drain pan, and your blower fan distributes their spores and byproducts through every register in the house.
Changing your air filter won’t fix this. The biological growth is happening behind the filter, on the coil itself.
Installing UV-C Light in the Air Handler
UV germicidal lights mount inside your air handler, typically within inches of the evaporator coil. A UV coil light runs 24/7, bathing the coil surface in UV-C radiation. This is the same short-wavelength ultraviolet light used in hospital operating rooms and water treatment plants. It breaks apart the DNA of microorganisms on contact, preventing mold and bacteria from surviving or reproducing on the coil.
For homes along the Hector Connoly Road corridor, in the Gloria Switch area, and throughout the neighborhoods north of I-10, this upgrade is especially relevant. Many of these homes have air handlers in attic spaces where temperatures soar above 130 degrees on summer afternoons. That heat, combined with coil moisture, creates accelerated biological growth conditions that outpace what you’d see in a climate-controlled utility closet.
Keeping the Drain Clear
One often-overlooked benefit of UV coil treatment is keeping the condensate drain line clear. Biological growth, particularly algae, frequently clogs these lines. When the drain backs up, water pools around the air handler and can cause significant water damage to ceilings, floors, and walls. Service calls for clogged drain lines are some of the most common in our region, and a UV light prevents the biological buildup that causes them.
Whole-Home Air Purification: What Filters Miss
Your air filter catches particles, the visible stuff like dust, pet dander, and pollen. It does little against gases, volatile organic compounds, or organisms too small to trap in filter media. Whole-home air purifiers use technologies like photocatalytic oxidation (PCO) or bipolar ionization to address these invisible contaminants.
The REME HALO system, one of the more popular options we install, generates low-level hydrogen peroxide molecules that travel through the ductwork and into your rooms. These molecules actively seek out and neutralize bacteria, viruses, mold spores, smoke particles, and odor-causing compounds. Rather than waiting for contaminated air to return to the system for filtering, the purification happens right where you live.
Why This Combination Works in Carencro
UV lights and air purifiers aren’t competing technologies. They handle completely different aspects of indoor air quality:
- UV coil lights prevent growth on system surfaces (coil, drain pan, plenum)
- UV air lights reduce airborne pathogens passing through the system
- Active air purifiers neutralize gases, chemicals, and ultra-fine particles throughout the home
In a climate where your AC runs for eight months and the air feeding into it carries more moisture than most of the country ever sees, layering these technologies gives you the best shot at genuinely clean indoor air. A single solution can help, but the combination covers gaps that any one product leaves open.
If you’re dealing with musty smells from vents, recurring drain line clogs, or respiratory symptoms that seem tied to your AC running, the source may be biological growth inside the system. Call F & R Air Conditioning at (337) 893-5646 for an inspection and recommendation on the right UV and purification approach for your Carencro home.