Question 1

How does a UV light system work in an HVAC unit?

Accepted Answer

A UV-C lamp is mounted inside the air handler, positioned so it shines on the evaporator coil. UV-C is a short wavelength of ultraviolet light that damages the DNA of microorganisms it reaches, which stops them from reproducing. Because the lamp runs continuously and the coil does not move, that surface gets constant exposure. That is where the technology does its most reliable work.

Question 2

Will a UV light get rid of the musty smell in my AC?

Accepted Answer

Often, if the smell is coming from growth on the coil, which is the most common cause. A UV light works on that growth over time rather than instantly, so if your coil is already dirty we usually recommend cleaning it first and then installing the light to keep it that way. If the odor turns out to be coming from somewhere else, such as a clogged drain line or wet insulation, a UV light will not fix it, and we will tell you that before you spend money on one.

Question 3

Is UV light installation safe for my family and pets?

Accepted Answer

Yes, when installed correctly. The lamp sits inside the sealed air handler, so no UV light reaches the living space. The only exposure risk is to a technician who opens the unit while the lamp is running, which is why service starts with the power off. There is nothing for you or your pets to come into contact with during normal operation.

Question 4

How long do HVAC UV lights last before the bulb needs replacing?

Accepted Answer

Most HVAC UV bulbs are rated for roughly a year of continuous use. The part people miss is that the bulb often keeps glowing after its useful output has dropped off, so you cannot judge it by eye. We note the install date and check it at your annual maintenance visit so it gets replaced on schedule rather than quietly doing nothing.

Question 5

Can a UV light be added to my existing system, or only a new install?

Accepted Answer

In most cases it can be added to the system you already have. The main requirements are enough room in the air handler to mount the lamp with a clear line of sight to the coil, and a nearby power source. We check both during the visit and tell you what your system can take before any work is scheduled.

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