This Is What 90 Days Looks Like

BioShieldUV™ customers photographed their coils on installation day and again 90 days later. These are their results.

John's coil — before and after 90 days
Day 0 Day 90
Alice's coil — before and after 90 days
Day 0 Day 90
Carlos's coil — before and after 90 days
Day 0 Day 90
Kevin's coil — before and after 90 days
Day 0 Day 90
Isaiah's coil — before and after 90 days
Day 0 Day 90
Dom's coil — before and after 90 days
Day 0 Day 90

BioShieldUV™ Meets the Highest UV-C Standards

The Invisible Problem in Every HVAC System

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Biofilm Forms Gradually
  • Every HVAC cycle pulls particulates, moisture, and biological matter across the evaporator coil
  • Over time, this builds into dense biofilm embedded in fins and drain surfaces
  • Growth continues silently between maintenance visits
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The System Pays the Price
  • Restricted airflow as fouling thickens
  • Reduced heat transfer efficiency
  • Longer run cycles
  • Higher energy consumption
  • Declining air quality
Studies on coil fouling show pressure drop increases of up to 75 percent in heavily contaminated systems.
How UV-C eliminates it
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UV-C light at 253.7 nm is absorbed by the DNA of microorganisms, preventing reproduction and eliminating biological matter at the surface level

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A BioShieldUV™ system installed with line-of-sight to the coil irradiates the fin surface and drain pan continuously, 24 hours a day

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Biological matter is eliminated before it can accumulate, rather than cleaned up after the fact

Research diagram showing HVAC coil cross-section with biofilm accumulation

BioShieldUV helps you keep your UV-C clean every 10 months with automatic bulb replacement.

Learn More

Here Is What Our Customers Are Saying

How the Promise Works

Unlike most guarantees, this one does not just live in fine print. BioShieldUV backs the Clean Coil Promise™ with two photographs taken 90 days apart.

01
Photograph your coil on Day 0
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Photographing coil on Day 0
Before powering the unit on, photograph your evaporator coil and email the image to contact@bioshielduv.com with your order number. This establishes your baseline and must be submitted within 14 days of installation.
02
Install your system and run it continuously
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BioShieldUV system installed
Mount your BioShieldUV system in accordance with the Installation Guide run it 24 hours a day throughout the 90-day period.
03
Photograph your coil again on Day 90
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Photographing coil on Day 90
Between Day 80 and Day 100, open the air handler and photograph the coil from the same angle as your Day 0 image. Send it to photos@bioshielduv.com with your order number.
04
See the difference, or claim your full refund
Day 0 vs Day 90 coil comparison
If your photos show a visible improvement, the promise is fulfilled. If they do not, email support@bioshielduv.com with your order number and both images. Approved refunds are returned to your original payment method within 10 business days. You keep the unit either way.

Terms and conditions

What is covered

A full refund of the product purchase price including original shipping, for customers who do not observe a visible improvement in coil condition between their Day 0 and Day 90 photographs. Applies to all BioShieldUV™ UV-C systems across the Classic and Magnetic Series.

What is not covered

Non-biological contamination such as dust, dirt, and mineral deposits. Systems not operated continuously at 24/7 during the 90-day window. Installations without direct line-of-sight to the coil face. Replacement bulbs and accessories. Purchases through unauthorised resellers. Commercial and industrial applications. Consequential damages and installation costs.

Eligibility

Product must be purchased from bioshielduv.com or our official Amazon store. Day 0 photograph must be submitted within 14 days of installation. Day 90 photograph must be submitted between Day 80 and Day 100. Refund request must be submitted within 100 days of original purchase.

Refund process

Email support@bioshielduv.com with your order number and both photographs. Claims are reviewed within 5 business days and approved refunds are returned to the original payment method within 10 business days.

Your Coil Needs Protection Beyond Day 90

Every TruBlu™ bulb carries a 10-month warranty, and BioShieldUV makes sure that replacement arrives automatically before that window closes, with additional benefits.

  • Free to join
  • Replacement lamp delivered every 10 months
  • 10% off on replacement bulbs
  • Lifetime warranty coverage included

Disclaimers

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Educational Disclaimer

This information is provided for educational purposes only. BioShieldUV Inc. is a manufacturer and does not provide installation services. Customers are responsible for hiring qualified, licensed HVAC professionals for all installation questions, guidance, and services.

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No Pesticidal Claims

BioShieldUV Inc. makes no pesticidal claims regarding our products. We do not claim our products disinfect air, kill specific pathogens, prevent disease, or provide any health benefits. The Clean Coil Promise covers observable physical improvements to HVAC system components — not health outcomes. Any references to research are from third-party sources and are for educational purposes only.

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Ozone Safety

BioShieldUV systems are independently tested at 0.014 ppm ozone production, well below the EPA and CARB safety limit of 0.05 ppm.