$24.97
The Guardian Club Decision
You already own a BioShieldUV system. Now, the next step is to protect your investment for 10+ years, in one simple step – Joining the Guardian Club As a member, you get lifetime unit warranty + 6-month bulb guarantee + replacement bulbs at a discount.
It’s straightforward: with Guardian Club, you’re always covered. Without it, your warranty ends after just one year.
The Guardian Club isn’t just a membership; it’s your safety net. We take care of your system so you can focus on the benefits. You save money, skip the hassle, and enjoy protection that never runs out.
Why Guardian Club Just Makes Sense
Imagine these real-world scenarios, and how different they look depending on whether you’re insured under a Guardian Club membership.
Situation
Guardian Club Member
Non-Member
Unit breaks after 13 months
No stress - we replace it for free under your lifetime warranty.
Bad news: No warranty coverage. You’ll pay full price for a whole new unit.
Bulb fails after 30 days
We ship another replacement bulb for free. 6-month guarantee on all bulbs from shipment date.
No replacement. Only 14-day DOA policy.
Bulb arrives DOA
Quick fix - we immediately ship a new one, no questions asked.
Only replaced if reported within 14 days. Miss it, and you’re stuck.
Want to rejoin after warranty expires
No problem - rejoin anytime with just a 50% reactivation fee.
Not possible.
Your cost
No cost. In fact, you get a discount on your replacement bulbs, so you save more.
Full retail price on replacement bulbs + cost to purchase a new unit after warranty period.
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Replacement Bulbs
Replacement Bulbs
4.6 / 5.0
(157) 157 total reviews
Trusted by 10,000+ families nationwide
Magnetic
BioSL18 MagShield (Magnetic) 1x Replacement Bulb (previously known SKU MAFA24V18BB) Variant sold out or unavailable 
BioSL36 MagShield (Magnetic) 1x Replacement Bulb Variant sold out or unavailable Classic
BioS18 ApxShield (Classic) 2x Replacement Bulbs Variant sold out or unavailable 
BioS72 ApxShield (Classic) 2x Replacement Bulbs Variant sold out or unavailable 
BioS36 ApxShield (Classic) 2x Replacement Bulbs Variant sold out or unavailable 
Lifetime Warranty* (with the Guardian Club only) Free Returns (Within 90 Days) Certified Safe by CE, ETL**, RoHS, & FCC *1-Year Warranty on BioShieldUV Devices without a Guardian Club membership.
Note: Standard shipping bulb orders dispatch on the 1st Friday of each month.
🚚 Need it sooner? Choose "Ship Now" Express 🛡️ Protect your shipment against loss or damage Add shipping insurance at checkout — free reship if anything goes wrong Insured View full details
TruBlu™ UV-C Technology
True253nm wavelength with zero ozone production for maximum effectiveness & safety.
Zero* Ozone Emission
Tested at 0.013ppm vs. EPA and CARB limit of 0.05ppm. Safe for air handler use.
Safety Certified
Certified by CE, FCC, ETL, RoHS standards. Professional-grade reliability.
Watch Installation Instructions
Terms & Conditions
Membership Benefits
Lifetime Unit Warranty
As a Guardian Club member, your BioShieldUV system is covered for life. If your unit ever fails, we’ll replace it — no questions asked. The warranty period begins on the date of purchase.
6-Month Bulb Guarantee
Every bulb you receive is backed for 6 months from the ship date. That means if a bulb fails early, you get a free replacement.
Discounted Bulbs
Pay less than retail for every replacement bulb.
Automatic Shipments
Fresh bulbs arrive every 10 months, right on schedule. You’re only billed when they ship.
Immediate Backup Bulb
When you join, you’ll get an extra bulb shipped right away, so you always have a spare on hand.
Membership Terms
Grace Period – Join anytime within your first year of purchase at no cost.
After 1 Year – You can still join with a 50% initiation fee (based on your unit’s current retail price). This applies if:
Your unit fails after the initial warranty ends.
You want discounted bulbs after your first year.
You were previously in the Guardian Club but let coverage lapse.
Billing – No upfront fees. You’re only charged $25.47 every 10 months when bulbs are shipped. No hidden costs, no surprises.
Non-Guardian Club Terms
Unit Warranty: 1-year limited warranty on BioShieldUV devices without Guardian Club membership.
Bulb Warranty: No bulb warranty except 14-day dead on arrival replacement policy from delivery date.
Warranty Requirement: To keep your warranty valid and maintain effectiveness, you must use BioShieldUV® replacement UV-C bulbs only.
Bulb Sales: All bulb sales are final. Since there’s no way for us to verify if a bulb has been used, bulbs cannot be returned or replaced after 14 days.
Important Notes
UV Bulb Nature: UV bulbs are incandescent and use a wire filament to generate UV rays. There is no way to predict and guarantee the exact lifetime duration of any specific incandescent bulb.
Recommended Schedule: We recommend replacing the bulb every 10 months (even if the bulb is not burnt out, the UV ray will likely be low & ineffective).
Immediate Replacement: All customers should replace the UV bulb immediately upon receiving. (Recommended)