Just imagine: you have a sanitizing device installed in your HVAC system that will kill mold, viruses, and bacteria that is safe and almost maintenance-free.
Ultraviolet lights have been used to sanitize hospital operating rooms, city water, food supplies, and commercial buildings for decades.
And now homeowners can install these powerful UV lights to purify their home's air 24/7 and easy enough to install in less than 15-minutes.
I invite you to check out my list of the best ultraviolet lights for your furnace.
You will love these UV lights!
In this HomeInspectorSecrets.com guide, you will learn:
- My top pick for the best UV light for HVAC systems
- How to install germicidal UV lights (step-by-step)
- How effective are HVAC UV lights really?
- Some tips on preventing UV damage to your furnace
Below is a quick list of all our top products. Keep scrolling to learn more about choosing and using the best ultraviolet light for the A/C or furnace.
| Image | Product | |||
|---|---|---|---|---|
My Top Pick  | My Top Pick | OdorStop
|
| View on Amazon |
Close Second  | Close Second | Honeywell
|
| View on Amazon |
Best Budget  | Best Budget | Reko Lighting R2000
|
| View on Amazon |
 | REKO With Magnet
|
| View on Amazon | |
 | OdorStop OS72PRO
|
| View on Amazon | |
 | Bio Shield
|
| View on Amazon | |
 | Honeywell RUVLAMP1
|
| View on HomeDepot |
Our Overall #1 Rated Pick
Updated On January 4, 2023
Our favorite pick for the best UV light for HVAC systems goes to the OdorStop OS144PRO1. The OdorStop UV light uses four long 16" light bulbs that are 36-watts each (a total of 144-watts). With four ultra-long UV bulbs and very high wattage, this UV light is powerful enough to sanitize homes up to 20,000 square feet!
It has an airflow sensor so that the UV light only turns on when the HVAC system is running—saving energy, money, and extending the life of the bulbs. The OS144PRO1 also comes with an installation template, screws, and gasket which makes the installation super-easy.
Our List of Highly Rated Ultraviolet Lights For Air Conditioners
Short on time? Check out our top 7 UV lights for HVAC systems below. Keep reading for all of the details on our best picks.
- OdorStop OS144PRO1 UV Light For HVAC Systems
- Honeywell Ultraviolet Light With AirBRIGHT Odor Absorbtion
- REKO Lighting R2000 120-Volt UV Light For Furnace
- REKO 14" Bulb HVAC UV Light With Magnetic Bracket
- OdorStop OS72PRO 72-Watts Ultraviolet Light
- Bio Shield 20-Watt Germicidal UV Light For HVAC System
- Honeywell RUVLAMP1 Ultraviolet Air Purifier
Ultraviolet Lights For Furnaces Will Kill Mold, Viruses, And Bacteria
The main benefit of installing a UV light for your HVAC system is that it can kill mold, viruses, bacteria, and other airborne pathogens.
Higher MERV furnace filters claim to also capture mold spores and even viruses, but they definitely won't sanitize the interior of your HVAC system. The downside of higher MERV-rated furnace filters is that they can cause a 'pressure drop' across your HVAC system which means less air flow.
Reduced air flow to your HVAC can lower its efficiency, may damage the equipment, and your home won't heat or cool as easily.
UV Lights Won't Replace The Need For High Quality Furnace Filters (And Changing Regularly!)
An HVAC UV light doesn't replace the need for a furnace filter, but it is primarily designed to kill microbes on the surface and in the air stream of your HVAC system. I invite you to read my guide on the three biggest benefits of HVAC UV lights for more information.
In the two pictures below, these are pictures from an actual home inspection where I recommend the installation of a UV light because the heat pump was littered with mold. It was pretty gross as you can see below.
The recommendation of an HVAC UV light during a home inspection
Pictures of mold in a Trane heat pump I found during a home inspection.
The Cost Will Range Between $100 to $500 For A UV Sanitizer
The average cost for a germicidal UV light for an HVAC system will range from $100 to $500. The higher priced UV lights usually have more wattage, more light bulbs, and advanced features. Higher end UV lights sometimes have sensors that will tell you when you need to clean the bulb, replace the bulb, and other "smart" appliance features.
Many of the air treatment UV lights have air flow sensors that will turn on the UV light only when the HVAC system is actually running. The air flow sensors can significantly extend the life of the bulb. In fact, the usual cost of maintenance is replacing the UV bulb every year at a cost of $50 to $75 per UV bulb.
Labor Cost To Install Should Be $50-$200 Range
The labor costs to install a UV light will also depend on the complexity. If the UV light is just plugged into an outlet, and isn't complicated, then you can hire an HVAC contractor to install it for $50 to $200. You can also have a handyman or air duct cleaning company install it.
However, if the UV light has to be hardwired into the HVAC system, or if you also have to connect a separate transformer — you can expect to pay more — probably in the $150 to $300 range, and I recommend you hire a licensed HVAC contractor or electrician.
Read Also: What Are The Best Honeywell UV Lights For HVAC Systems?
Germicidal Ultraviolet Lights Can Be Plugged Into A Nearby Outlet
HVAC UV lights sometimes can be a bit complex to install (especially if it's hardwired to the furnace) — so it isn't always a DIY job. But if the UV light just uses a power cord, it is a pretty simple installation, and can be done in an afternoon with a few tools.
The main tools you will need for the install include:
- electric drill
- paper template
- hole saw drill bit
- metal foil tape
HVAC UV lights are mounted onto the duct of your indoor air handler or furnace — usually with sheet metal (self-tapping) screws. Most UV light sanitizers will come with a paper template for the mounting procedure. I recommend following the size and placement of the holes on the mounting template for your UV light system.
Use A Hole Saw To Cut Into Sheet Metal Ductwork
You will first need to drill a pilot hole at the install spot, and then you will need to use a 2-3 inch hole saw bit, and drill in the hole.
The light bulb(s) will go through the hole in the sheet metal duct, and the UV light unit is secured to the ductwork with screws. You can also cover the seams of the UV light with metal foil tape to give it an air tight seal.
Here is my full installation guide for HVAC UV lights.
Another recommendation for cleaning HVAC system and installing anti-microbial UV light.
Furnace Ultraviolet Lights Can Damage Plastic And Rubber Parts
Depending on the strength and location of your unit, it is well known in the industry that UV light may damage plastic and rubber parts.
Things like...
- Cooling Drain Pan
- Wire Insulation
- Pressure Switch Hose
- Flexible Ducting
Use Aluminum Foil Tape To Prevent Damage
If the UV light is in direct line of sight of any plastic or rubber parts of your A/C, it is a good idea to shield those rubber parts with aluminum foil tape. Or at least make sure the direct line of sight is 3-feet or farther from the UV light bulb.
It's also a good idea to make sure that the UV light isn't in a location where someone may get exposed to UV light during HVAC maintenance.
Read Also: How To Prevent Mold in Air Conditioners?
Numerous Scientific Studies Prove That UV Light Is Germicidal
It has been known for decades that specific frequencies of light can harm microorganisms. Most research has been done in medical settings to help prevent contagious diseases. The most commonly used UV light frequency is 253.70nm which is the frequency when light passes through mercury vapor.
Ultraviolet light at this frequency has been clearly shown to destroy viruses, bacteria, and fungi. UV light bulbs stops mold growth by damaging their DNA. UV light has been in use for decades to sterilize air, water, and food.
A recent study concluded that UV light sanitized about 98% of microbes in hospital rooms, encouraging further use of UV light in intensive care.
Germ Reduction
A published scientific study has proven that UV light can greatly reduce germ contamination in air handing units in buildings. Contaminated air ducts with bacteria is known to be related to serious health problems such as…
- Allergic rhinitis
- Asthma
- Hypersensitivity pneumonitis
- Acute toxicosis
- Cancer from exposure to mycotoxins
Read Also: Does UV Light Really Kill Mold?
More Pictures Of Mold Inside An Air Conditioner
Here are some more pictures from an actual home inspection. As you can see, it is pretty obvious when there is mold growing in your air handler. If you are suspicious about your indoor air quality, just taking off the cover to your furnace can be an “enlightening” experience.
Mold growing on the insulation inside of a heat pump in the attic.
Mold growing on outside cover which should be wiped off but represents the extent of the mold problem.
Mold growing next to the evaporator coil due to the excessive moisture and dust.
Our Picks of Highly Rated Ultraviolet Lights For Furnaces
Here are the pros and cons of my top picks for the best UV lights...
Our hands-down #1 pick for the best UV light for HVAC is the OdorStop OS144PRO1.
This OdorStop UV light comes with four 16-inch light bulbs that are each 16-watts for a total of 144-watts.
The OS144PRO1 is so powerful it can handle homes and buildings up to 20,000 square feet!
It even comes with a special air flow sensor so that the light only shines when the HVAC is actually running—saving energy, money, and lengthening the life of the bulbs.
It also comes with a 6-foot power cord, installation template, screws, and gasket so that you can install it very fast.
Pros
Cons
This is the Honeywell UV air purifier UV2400U5000 that comes with the AirBRITE Odor Absorption system.
This UV light will kill microbes like mold and at the same time it will remove odors.
This is one of the best UV light for HVAC systems and it will kill and prevent mold on your A/C coil at a 99% efficiency. And it will remove VOCs (volatile organic compounds) up to 90%.
The UV light renews the carbon filter so it is maintenance free.
Pros
Cons
The REKO R2000 is a budget friendly UV light for HVAC systems. It is lightweight, doesn't take up much space, and comes with two light bulbs.
The 9-ft power cord means you have some flexibility when you plug it in to a nearby outlet hopefully without an extension. Each bulb is rated at 9-watts to kill any microbes lurking in your furnace or air handler.
To install the R2000, you will need to drill two 1-3/4" holes using a hole saw drill bit. Screw it in the furnace, plug it in, and you're done.
Pros
Cons
The REKO Lighting uv light with magnet is a budget friendly UV light.
It comes with a magnet that will stick to your furnace for an easier installation.
The bulb is 14-inches long and is designed to kill mold on your evaporator coil, blower fan, and ducting.
This unit needs to be hardwired to your furnace and connected to a transformer.
Pros
Cons
The OdorStop OS72PRO is a premium ultraviolet for HVAC systems that features one 16-inch 36-watt light bulb.
With its special frequency of UV light, it will kill and prevent mold and foul odors.
This unit also has indicator lights so you can know that it is working properly and the bulb is functional. It is easy to install and includes the template and rubber gasket for a tight fit.
OdorStop UV lights are some of the highest quality UV lights on the market and are pretty easy to install.
Pros
Cons
Bio Shield makes a popular HVAC UV light that comes with a 17-inch long single bulb.
It is rated at 25-watts which is more than suitable to sanitize most home HVAC systems.
This surface treatment UV light should be installed near or in the evaporator coil and it is not designed to kill microbes in the air.
It uses a 2-7/8" hole saw for the installation and it is mounted to the HVAC with three screws --- then simply plugged into an outlet.
It also comes with a mounting template to make the install easier.
Pros
Cons
This Honeywell HVAC UV light claims that it will kill up to 70% of microorganisms in your HVAC system.
It is a surface treatment UV light that kills microbes on your evaporator coil and other HVAC surfaces.
The Honeywell unit has an easily replaceable bulb that you can replace without unscrewing the unit from the HVAC system.
It comes with a light indicator so you know that it is on, and it also has a special design for a good and safe seal.
Pros
Cons
Our Top Pick: OdorStop OS144PRO1 UV Light For HVAC
#1. Quality Build
OdorStop is the leading manufacturer of UV Lights and they are designed to be powerful and effective.
#2. Effectiveness
With not one, but four 16-inch bulbs (each 36-watts) for a total of 144-watts, this UV light can sanitize the air in homes up to an astonishing 20,000 square feet.
#3. Energy Efficient
This OdorStop UV Light comes with a special air flow sensor so that it turns on only when your HVAC is running—saving you energy. You also won't have to replace your bulbs as often.
Read Also: How To Prevent Mold In Air Conditioners
