UV-C Bulbs for Mold-Free Indoor Air

Sold by a Small US Business. Independently Tested in the USA.

Order Now See Proof of Effectiveness Family relaxing in a living room with clean treated indoor air ApxShield Classic UV-C unit

ApxShield (Classic)

This variation requires permanent drilling in your air duct wall.

Cleaner air out Treats the coil Works 24/7 Soft purple background wash behind lamp cards Thin decorative gradient strip

UV-C Lamps That Are
Easy To Install & Maintain

Choose the DIY UV-C system that fits your HVAC setup and coverage needs.

18W

Up to 1,500 sq ft

36W

Up to 3,000 sq ft

72W

Up to 4,500 sq ft

BioShieldUV ApxShield dual-bulb UV-C unit

BioShieldUV ApxShield™

Install once and keep the unit in place. When it's time to replace the bulb, you'll need to unscrew the unit and reinstall it in its original position.

18W 36W 72W Place Order

Installation Time: 15 minutes

View Full Installation Guide BioShield Magnetic UV-C lamp with magnetic mount

BioShield Magnetic™

Flexible positioning

A compact magnetic mount lets you position the lamp inside your HVAC unit. Replace the bulb without removing the mount. Cable hole drilling required.

Wall Plug HVAC-24VAC Ballast 18W 36W Place Order

Installation Time: 10 minutes

View Full Installation Guide HVAC ductwork line illustration Thin decorative gradient strip

We Give Every Customer 90 Days To Prove Us Wrong

If your evaporator coil shows no visible improvement, we'll refund every dollar
– and you keep the unit.

Dirty evaporator coil before UV-C treatment BioShieldUV UV-C lamp unit Day 0

Rotate the dial to reveal the results

A BioShieldUV system irradiates the evaporator coil and drain pan with 253.7 nm UV-C light to help prevent mold and bacterial growth on treated surfaces.

Visibly cleaner evaporator coil

Decreased air pressure drop across the coil

Improved heat transfer efficiency

Try the 90-day clean coil promise Customer photo Customer photo Customer photo

Trusted by 10,000+ homeowners in the USA

We Say ‘DIY-Friendly’. Homeowners Back It Up.

BioShield UV light glowing blue inside an HVAC unit GG

Gabrielle G.

Oct 9, 2026

Easy install. Fast shipping. Customer service fixed a mistske on my end.

Customer photo of a BioShield UV-C replacement bulb box submitted with Eugene R.’s review

I received my annual replacement bulb a few days ago. Worry free about remembering the date it needs to be replaced with the annual membership program. Bulb arrived if perfect condition. BIO Shield UV send link for how change bulb ( very useful).

ER

Eugene R.

Sep 21, 2026

Customer photo of an installed BioShield unit on an HVAC plenum submitted with Robert S.’s review RS

Robert S.

Feb 20, 2026

Easy to install.

Customer photo of a BioShield unit glowing blue behind a vent grille submitted with Fred C.’s review FC

Fred C.

Feb 20, 2026

It seems brighter than the original one I ordered from Amazon. Hopefully it lasts longer.

Customer photo of fluorescent minerals glowing under a BioShield UV light submitted with Robert M.’s review RM

Robert M.

Feb 20, 2026

I have used your bio-shield 254 nm light to make a light box for UV reactive minerals. (I also had to buy some 254 nm UV pass glass (to filter out all of the other wavelengths of light)), but you light works wonderfully. I am thrilled with your 70 watt light. For context, a year ago, I paid $265 for a 7 watt 254 nm flashlight to illuminate minerals. Compared to that flashlight, the Bio-Shield light is FANTASTIC! It illuminates a broad area brightly. It is everything that I had hoped for. I hope that you do not mind me 'misusing' your light., and I hope that you have a nice day.

Customer photo of a BioShield unit installed on HVAC ductwork submitted with Robert H.’s review RH

Robert H.

Jan 31, 2026

I installed two units using duct access doors. This allows quick and easy access to service the lamps when necessary and not having to remove and replace four screws. A little extra labor and one time cost for the doors but long term ease. I used 12X12 doors with thumb latches allowing straight out service. A hinged door would be problematic. The units are functioning well and I believe after much research they will clean our air and reduce our allergies reactions. Both systems have April Aire Merv 13 filters.

Customer photo of a home vent glowing from a BioShield UV light submitted with Paul F.’s review PF

Paul F.

Nov 27, 2025

The fact that it plugs in is great. At some point I will get some more and wire them in.

Customer photo of a BioShield UV lamp glowing blue inside an HVAC air handler submitted with Gary A.’s review GA

Gary A.

Nov 10, 2025

Timely shipping, although this is a spare since the original was just installed.

Customer photo of an installed BioShieldUV control box on ductwork submitted with Brian L.’s review BL

Brian L.

Oct 20, 2025

This 72W UVC is a simple and cost effective solution for my hvac. I originally purchased this as we were noticing some undesirable smells from the vents. A little work on the A-frame drain and the addition of this uvc has remedied the issue. Unfortunately the first unit didn’t even last a year before the internal ballast went out. However, Bioshield came through with their warranty coverage and’s replaced the unit. 👏👍🏼

Customer photo of an installed BioShield ballast inside an air duct submitted with D B.’s review DB

D B.

Oct 11, 2025

Quick and easy to install! I could tell a difference in air quality almost instantly for the better. I'm impressed! Ordering, shipping, all super easy!

Customer photo of an installed BioShield18 unit on ductwork submitted with Paul H.’s review PH

Paul H.

Aug 28, 2025

The auto shipment of replacement bulbs is a life-safer, I would totally forget to replace them otherwise. BioShield makes it so easy (and the price is reasonable!) Thanks!!

Customer photo of an installed HVAC air handler cabinet submitted with Neil Y.’s review NY

Neil Y.

Aug 21, 2025

easy - would like to have latex gloves included

We make sure installing a UVC doesn’t feel like a major HVAC project.

A BioShieldUV® Comes With Zero Unknowns

From 0.014 ppm measured ozone output to documented compliance, see what we’ve tested and what each result means.

01 Petri dishes under a UV lamp in a test laboratory

Measured ozone output

0.014 ppm

Our UV-Cs emit an ozone output of 0.014 ppm under its stated test conditions, way below the standard limit of 0.05 ppm.

See test reports Measured 0.014 ppm ozone output mark 02 Circuit board beside a leaf in a petri dish, marked compliant

Restricted-substance compliance

RoHS

RoHS compliance addresses restrictions on specified hazardous substances in electrical and electronic equipment.

RoHS certification mark 03 CE certificate document on a clipboard beside a UV-C unit

European conformity

CE marking

This indicates conformity with stricter European safety benchmarks.

CE conformity mark Explore Certifications Guardian Club purple gradient background Guardian shield watermark pattern

Your Replacement Bulb Is
Already On Our Calendar

UV-C bulbs are designed to last 10–12 months. Guardian Club makes routine UV-C maintenance easier to manage, with scheduled deliveries and membership benefits.

2,500+ active members

Guardian Club membership icon

1 membership. ∞ coverage.

Explore Benefits Automatic bulb delivery icon

Auto Bulb Deliveries, 10% Off Every Time

Replacement bulbs ship automatically every 10 months, with your 10% member discount applied to each shipment. No coupon codes or manual reordering required.

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Lifetime Warranty On Your UV-C Unit

We'll replace the unit at no cost if your membership is active & the product faults – including manufacturing defects, component failures and electronic malfunctions.

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Six-month Warranty On Every Replacement Bulb

Every Guardian Club bulb shipment comes with six months of replacement coverage. If a bulb fails during that period, we'll send a replacement at no cost.

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No Monthly Membership Fee

Join free when purchasing your BioShieldUV unit or within the first year of your original purchase. Past that first year, a one-time $19.95 enrollment fee applies. Lifetime warranty, bulb discount and bulb warranty activate six months after enrollment.

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Why Your HVAC Needs Continuous UV-C Protection

HVAC systems need their evaporator coils cleaned routinely. Neglecting them can allow dust, mold, and airborne contaminants to be suspended in your air. UV-C lamps at a wavelength of 253.7nm help prevent mold and bacteria from growing on your HVAC coil.

BioShield Magnetic UV-C lamp with magnetic mount Buy MagShield™ ApxShield dual-bulb UV-C unit on mounting plate Buy ApxShield™