ZenGUARD™ · Patented silver graphene oxide coating

Science in.
Cleaner air out.

Developed by Zentek in Guelph, Ontario, and built into two things you already use: the filter in your furnace and the mask you wear.

How the coating works
Illustration of a graphene lattice

The technology

One technology. Built in.

  1. The media you already use

    The pleated media in a furnace filter. The second layer of a surgical mask.

  2. ZenGUARD™ technology

    Patented silver graphene oxide, formulated for each product and applied directly to that media.

  3. The same product, working harder

    Same fit, same format, same routine. No new system to install.

Two products.
One technology.

Each is a product you already know, with ZenGUARD™ built in: one for the air in your home, one for the air you breathe.

01 · In your furnace

EnhancedAir Filter

Where it goes
On the pleated media of a standard MERV 9A furnace filter.
Result
42%Viral aerosol disruption, against 16% without ZenGUARD™ (≈2.6×).MS2 bacteriophage surrogate · new filter
Up to 74.9% Viral aerosol disruption
Mid-life
Day to day
Every 90 days, or sooner with pets or allergies. Fits standard 1, 2 and 4 inch furnace slots.Find my size

From $127.44 pack of 2 Subscribe and save 10%

See insideShop filters

02 · On your face

AntimicrobialSurgical Masks

Where it goes
On the second of four layers, just behind the fluid-repellent outer layer.
Result
99.99%+Bacterial and viral filtration efficiency.Independent lab testing · ASTM F2100 Level 3
Day to day
The same fit and single-use format as the mask you wear today.For clinics and businesses

$15.99 box of 50 Subscribe and save 10%

See insideShop masks

Inside the filter

The same MERV 9. Enhanced.

A standard MERV 9 filter, with one layer a regular filter doesn’t have. ZenGUARD™ silver graphene oxide is applied directly to the media, which enhances the filter’s ability to disrupt aerosols, with no measurable effect on airflow.

Standard MERV 9 media, without ZenGUARD™.

Air in Air out 04 02 03 01

Animation for illustrative purposes only.

  1. Cardboard frame

    Rigid kraft board keeps the filter square in the slot.

  2. Pleated MERV 9 media

    The same media you’d find in a regular MERV 9.

  3. ZenGUARD™ coating

    Silver graphene oxide, applied directly to the media. The one layer a regular filter doesn’t have.

  4. Expanded-metal support

    Backs the pleats so they hold their shape under airflow.

  • 42%

    Viral aerosol disruption, against 16% without ZenGUARD™ (≈2.6×)

    MS2 bacteriophage surrogate · new filter

  • 22%

    Estimated fan energy reduction

    vs MERV 13 · school pilot

  • Up to 74.9%

    Viral aerosol disruption

    Mid-life

No measurable airflow impact · Meets ASHRAE 52.2 · Three peer-reviewed ASHRAE publications

See the lab results →

Inside the mask

Four layers. One enhanced.

ZenGUARD™ is a silver graphene oxide coating, not a mask. We start with a standard ASTM Level 3 surgical mask and apply it directly to one of its layers, so the layers you already trust work harder.

A standard four-layer surgical mask, without ZenGUARD™.

Outside → against your face 01 02 03 04

Select a layer to explore it. For illustrative purposes only.

ASTM Level 3 · 4-layer · Single-use · Made in Canada.

Advanced science.
Better performance.

Developed by Zentek, and tested to a named standard in each product. Every figure we publish says how it was measured.

  • MEETS

    ASHRAE Standard 52.2

    FILTER

  • VALIDATED

    ASHRAE Standard 241

    FILTER

  • PUBLISHED

    Three peer-reviewed ASHRAE papers

    FILTER

  • TESTED

    ASTM F2100 Level 3

    MASK

  • EXCEEDS

    Viral filtration level of a regular mask

    MASK

  • LISTED

    Federal Pathway to Commercialization source list

    ZENTEK

Made in
Canada.

Developed by Zentek in Guelph, Ontario. Every ZenGUARD™ filter and mask is made in Canada.

Zentek Ltd. · 1123 York Rd, Guelph, Ontario N1E 6Z1