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We detect what you suspect.

Our Recommendation For An

In Home/Office Air Purifier

From Elemental Air Systems

Use the coupon code “IET20” at checkout to receive $200 OFF your purchase!
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Why Indoor Environmental Testing Recommends Elemental Air Systems

At Indoor Environmental Testing, our job is to identify and quantify the contaminants affecting your indoor environment — and then point you toward solutions that actually work. After years of field testing, air sampling, and independent analysis, we keep coming back to one brand: Elemental Air Systems.

Unlike units that rely on unproven technologies such as UV light, ionizers, or ozone generators — which can pose real health risks — the Aspen Air Purifier uses only two time-tested, clinically validated methods: True HEPA mechanical filtration and activated carbon adsorption. These are the same technologies trusted in hospitals and laboratories. No harmful byproducts. No gimmicks.

What sets Aspen apart isn’t just what it captures — it’s the sheer volume of clean air it delivers, and how efficiently it does so. For our clients dealing with chronic allergy or asthma symptoms, VOC exposure from new construction, wildfire smoke infiltration, or elevated particulate readings on our air quality reports, the Aspen has produced measurable, meaningful results.

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Three-Stage Filtration — The Way Clean Air Should Work

The Aspen Air Purifier uses a carefully engineered three-stage system. Every cubic foot of air that enters is returned to your space dramatically cleaner — no ozone, no ionization risk, no compromise.

Stage 1 Allergy Filter

(MERV 14)
Captures the allergens that trigger the most complaints from our clients: dust, pollen, pet dander, mold spores, dust mite debris, sneeze droplets, asbestos fibers, and fiberglass insulation particles. Independently tested to ASHRAE 52.2 standards, this MERV 14-rated filter handles all PM10 and PM2.5 pollutants before they ever reach the deeper stages.

Activated Carbon Filter

(3.3 lbs)
Most carbon filters use a thin sheet of carbon-impregnated material — barely enough to make a dent in chemical pollutants. Aspen uses 3.3 pounds of granular activated carbon with millions of microscopic pores that trap and neutralize VOCs, formaldehyde, tobacco smoke, cleaning product off-gassing, and other chemical contaminants our air quality testing regularly detects in homes and offices.

Microparticle HEPA Filter

Captures ultrafine particles the first two stages allow to pass. Tested to remove more than 99.97% of particles at 0.1 microns — including bacteria, viruses, radioactive fallout, smoke submicrons, and fine smog particles. The COVID-19 virus measures approximately 0.12 microns, and this filter exceeds the capture threshold at that size on a single pass.
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Proven Science — Not Marketing Gimmicks

As indoor air quality professionals, we understand the science behind air purification — and the difference between technologies that genuinely work and those that create a false sense of security or actively introduce new contaminants into your space.

Many competing purifiers use UV-C light, ionizers, or ozone generators. Here’s what our testing and independent research consistently shows: UV-C lights cannot meaningfully damage bacteria or viruses in moving air — the exposure time is simply too short. And UV-C produces ozone as a byproduct.

Ionizers electrically charge particles so they stick to surfaces — including your lungs. They don’t remove contaminants from the air, they just relocate them.

Ozone generators produce a gas that is a known respiratory irritant and lung-damaging compound, even at low concentrations.

The Aspen is guaranteed to produce zero ozone, uses no UV or ionization, and relies exclusively on HEPA mechanical filtration and activated carbon — the only two technologies the scientific and medical community universally endorses for safe, effective air purification.

Get $200 OFF — Use Code IET20