Installation Guide

BioShieldUV® Classic (S) Series Complete Installation Guide

Models covered: BioS 18W Classic | BioS 36W Classic | BioS 72W Classic

20 min Install Time 8,000 Hours Lamp Life 253.7 nm UV-C Wavelength

Before You Begin: HVAC models must be installed by a licensed HVAC technician or electrical contractor. Installation by anyone other than a qualified professional voids the warranty. All installations must comply with applicable national and local building codes. Read all safety warnings in full before handling any components.

Suitable for Air-Handling Use Dry Locations Only

Quick Start options

Watch Installation Video:

Jump to a section:

Safety Precautions Preparing HVAC Wall (Part 1) Preparing Base Unit For Install (Part 2) Placing Base Unit Onto HVAC Wall (Part 3) Guardian Club Troubleshooting Frequently Asked Questions Follow Safety Precautions closely before beginning installation.

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Check Which Model You’ve Purchased

BioS 18W Classic

BioS 36W Classic

BioS 72W Classic

If You Ordered The Wrong Model, Please Contact Us To Exchange

Text or call (US & Canada) : +1 (307) 364 0340 Email : [email protected]

Safety Warnings

Follow all safety and building codes. Read every warning below before installing, adjusting, or servicing the unit. These warnings apply to all models and all installation environments.

Installation Safety

Read the manual carefully before attempting to install the unit. Improper installation, adjustment, alteration, service, or maintenance can result in fire or electrical shock and create a risk of personal injury or property damage. Consult a licensed electrician or contractor for assistance during installation.

Lamp Handling

Handle the UV lamp with gloves at all times. Oils from bare hands reduce UV output and cannot be reversed by cleaning.

If the lamp glass is touched without gloves, wipe the affected area with isopropyl alcohol before powering the unit on.

Eye Safety

Never expose eyes directly to UV light. Looking at the lamp can cause eye damage.

Wear safety glasses during installation and any maintenance work.

UV Material Exposure

UV-C light travels in a straight line and will degrade certain materials that fall within its direct path over time. Plastic drain pans, flex duct liner, foam insulation, filter media, and exposed wiring are all susceptible.

Before installing, shield any vulnerable materials with aluminum foil tape. Metal ductwork and components are unaffected.

Electrical Safety

Turn off the main power switch before plugging in the unit or performing any maintenance on it. Some installations have more than one disconnect switch. Check for all of them before beginning work.

Broken Lamp Hazard

Never touch a broken UV lamp with bare hands.

UV lamps contain a small amount of mercury and may be harmful to skin and eyes if released. If mercury contacts skin, wash the area immediately with mild soap and water and seek medical attention if necessary. Carefully collect broken pieces and dispose of them in accordance with local environmental regulations.

Location Restrictions

Improper installation, adjustment, alteration, service, or maintenance can result in fire or electrical shock.

Installation Restriction

This unit is rated for dry locations only and must be installed exclusively in supply or return ductwork. It is not intended for supplemental heating applications and must not be installed in ductwork where supply air temperature regularly exceeds 105°C (221°F).

What is in the Box

Ballast & 2 UV-C Bulbs

Integrated ballast with two germicidal UV-C bulbs

120V Wall Adapter

Powers the base unit

Air-Seal Strips

Perimeter gasket, peel-and-stick

Metal Drill Bits & Mounting Screws

For bulb holes and corner mounting screws

User Guide

Printed user guide

Adhesive Drilling Template

Marks bulb holes and mounting screw positions

Safety Precautions Before Installing

Turn off HVAC system and ensure all electrical connections are off.

Never look directly at UV-C light. Wear protective eyewear and gloves. Avoid touching the bulb glass or clean it with isopropyl alcohol if touched.

Part 1: Preparing HVAC Wall

Position Template

Place the mounting template on the HVAC panel (included in the kit). It is a sticker and should stick on easily.

Drill Holes for Bulbs

Drill two holes at the template’s marked positions where the bulbs would go (circular drill bit included).

Drill Holes for Mounting Screws

Drill 4 holes on the corners (marked in the template) where the mounting screws would be inserted (circular drill bit included).

Part 2: Preparing Base Unit For Install

Slide UV-C Bulbs Into Slots

There are two slots on the base unit. Slide the UV-C bulbs into each slot till you hear them click.

Seal Strips (Optional)

Peel off the back of the air-seal strips and stick them around the perimeter of the base unit. (Air-seal strips included in the kit, cut to size if required).

Part 3: Placing Base Unit Onto HVAC Wall

Place Unit Into The HVAC Wall

Pick up the prepared base unit and carefully insert the bulbs into the drilled holes. Make sure the corner holes align with holes on the unit.

Screw In

Use the provided screws to secure the unit in place.

Combine Power

Attach the adapter to the base unit, then plug it into a nearby 120 V outlet.

Post-Installation Checks

Ensure the indicator light is ON — this confirms the lamp is operating.

Clean around the unit of any dust to maintain optimal UV performance.

Maintenance & Replacement

Replace the UV-C bulbs every 10 months (approximately 8,000 hours).

Output fades before the bulb goes dark — replace on schedule, not on appearance.

Never Miss a Replacement with Guardian Club

Guardian Club automatically ships you a replacement lamp every 10 months. Members receive 10% off replacement bulbs, automatic warranty coverage, and hassle-free delivery every cycle.

All replacement bulbs include a 14-day warranty from the date of delivery. Guardian Club members receive extended coverage of up to 6 months from delivery.

Free to join. Ships automatically. Keeps your warranty active.

Join The Guardian Club Order Replacement Bulbs Guardian Club replacement service

www.BioShieldUV.com/club

Troubleshooting

Issue	Likely Cause	Fix
No indicator light	Unit isn’t getting power	Check that the outlet is live, the adapter is fully seated, and the breaker hasn’t tripped.
Bulb won’t seat	Bulb isn’t fully inserted	Push the TruBlu bulb in until you hear an audible click. It should sit flush in the socket.
Ozone smell on first use	Normal burn-in period	This is expected during the first run and dissipates within 24 to 48 hours.
Air leakage around the unit	Gap between the unit and duct panel	Apply air-seal strips or foil tape around the perimeter to close the gap.

UV-C Lamp Disposal

UV-C lamps contain a small amount of mercury and must be disposed of in accordance with local environmental regulations. Do not place used lamps in standard household waste unless your local waste management authority explicitly permits it.

Visit www.lamprecycle.org to find mercury lamp recycling locations near you, or www.earth911.com to locate your local or state waste management program.

Many hardware and home improvement retailers that sell UV or fluorescent bulbs also accept used bulbs for drop-off recycling at no charge. If no recycling option is available and local regulations allow, seal the lamp in a plastic bag before placing it in household waste collection.

Frequently Asked Questions

Do I need a professional installer? No. ApxShield is a homeowner-installable unit — it plugs into a standard 120V outlet and requires no dedicated wiring or licensed technician. How much duct clearance do I need? It depends on your model. The 18W needs at least 7 inches of clearance, the 36W at least 10 inches, and the 72W at least 17 inches. Measure the inside width of the duct near the evaporator coil before drilling to confirm the unit will fit. Can I install this on non-metallic ductwork? Yes. ApxShield mounts with screws through the duct wall and is compatible with all ductwork materials — metal, fiberglass board, and flex. What does the indicator light mean? ApxShield has a single on/off indicator. When it is lit, the unit is powered and the bulbs are operating. If it is not lit, check that the 120V adapter is fully seated at both the outlet and the unit. The indicator does not signal bulb age — replace the bulbs on the 10-month schedule regardless of the light. The unit smells strange on first use. Is that normal? A faint ozone smell can occur when UV-C first energizes. It should fade quickly. Ventilate the space; a persistent strong smell warrants a check of placement and output. Will UV-C damage plastic or rubber components inside my system? Prolonged direct exposure can degrade some plastics and rubber. Keep non-metallic parts out of the direct beam and inspect nearby materials periodically. How do I know when to replace the bulb? Every 10 months (about 8,000 hours). UV-C output fades before the bulb goes dark, so replace on schedule regardless of appearance. Guardian Club ships replacements automatically.

Take replacement off your to-do list entirely. Guardian Club members receive automatic delivery on the right schedule. [Join for free →]

Need Help?

Text or Call: +1 (307) 364 0340 - available in the US and Canada Email: [email protected] Hours: Monday to Friday, 9 am to 6 pm PST