We Believe in Lab and Real World Testing

We test in EPA-certified testing chambers as well as in many tough “real world” environments, because real results are what we’re all about.

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Active HEPA+
HVAC
3000+
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Jump to Study
Active HEPA+
HVAC
3000+
750+
More

Active HEPA+ Lab Test Results

Lab Test: Aerosol Deactivation of SARS-CoV-2

Greentech Active HEPA+
  • Product : Active HEPA+
  • Technologies: PCO/BPI/HEPA/ODOGard
  • Test time: 3:20 minutes
  • Air exchange equivalent: 10
  • Test space: Class III Biosafety Cabinet, 2.5×3.5×1.5 ft
  • Test location: MRIGlobal

Results : 99.98% Inactivation of SARS-CoV-2

These tests conclude that the Active HEPA+ is highly effective at reducing the infectivity of aerosolized SARS-CoV-2 virus with a 3.63 log (99.98%) reduction within three (3) minutes and twenty (20) seconds of operation in relation to baseline control results.

These results also show that HEPA+ had a reduction in aerosol mass and median size within the three (3) minutes and twenty (20) seconds of operation, with a mass removal of approximately 2 logs.

While particle mass reductions of only 2 logs were observed, Active HEPA+ demonstrated viral infectivity reductions greater than 3.5 logs, which supports the hypotheses that both active and passive technologies contribute to overall product efficacy.

Active HEPA+ Field Test Results

Extended Care: TVOC & Particulate Matter

Greentech Active HEPA+
  • Product : Active HEPA+
  • Technologies: PCO/BPI/HEPA/ODOGard
  • Test time: 14 days total – real time measure
  • Test space: 12’x22’x8’ double occupancy room
  • Test administrator: IAQS

Results : >99.9% Reduction TVOC & PM

“The initial odor level was very significant and somewhat unpleasant even when wearing a mask. I was no longer able to smell the odors through the mask by the day 3 visit. On every subsequent visit, the smell in the room would be described as typical and no longer extreme or offensive – even without my mask.” – Keith Roe, IAQS

Both qualitatively and quantitatively, there was a measurable and sustained reduction of odor and TVOC levels when the unit was functioning in comparison to the initial levels found inside the room.

When reviewing the data, it should be noted that the unit was inadvertently turned off on day 4, causing numbers to rise. Once the unit was turned back on, levels of TVOC and PM dropped again, demonstrating the Active HEPA+’s contribution to improved indoor air quality.

NAME TYPE REDUCED
TVOC Airborne >99.90%
HCHO (formaldehyde) Airborne 67.00%
PM 2.5/10 and RPC Airborne >99.90%

The proof is in the data.

Extensive testing showed similar impressive results. TVOCs were reduced 99.9% and formaldehyde (HCHO) reduced to 33% of the original concentration. Both Total Particulate Matter (PM) and Respirable Particle Counts were significantly reduced during testing.

Commercial Offices : Mold, Bacteria, TVOC, & Odors 

Greentech Active HEPA+
  • Product : Active HEPA+
  • Technologies: PCO/BPI/HEPA/ODOGard
  • Test time: 5 days total – measured in real time
  • Test space: 1240 sq.ft. commercial office
  • Test administrator: IAQS

Results : >99.9% Reduction of Airborne Mold, Bacteria, TVOC, and 99.9% Reduction of Surface Bacteria and Odors

“It is my considered observation that over the duration of this study, with the expected environmental fluctuations that occurred in a real-time setting, this study indicates that Active HEPA+ coupled with a standard MERV 10 HVAC filter at minimal air turns per hour produces results that substantiate an overall high degree of efficacy. This high rate of efficacy was achieved within the first 24 hours of operation even at lower air turn rates. This would not be expected or typical.”

Ozone levels throughout the duration of the test remained below TLV guidance and below levels measured outdoors.

NAME TYPE REDUCED
Mold Spores Airborne >99.90%
Mold Spores Surface 41.00%
Bacteria Counts Airborne >99.90%
Bacteria Counts Surface >99.90%
TVOC Airborne >99.90%
HCHO (fomaldehyde) Airborne >99.90%
PM 2.5/10.0 Airborne 85.50%
Respirable Particle Counts Airborne 80.00%
Odor Intensity Airborne >99.90%

Extended Care: Mold, Odors, & TVOC

Greentech Active HEPA+
  • Product : Active HEPA+ Pro
  • Technologies: PCO/BPI/HEPA/ODOGard
  • Test time: 5 days total – measured in real time
  • Test space: 300 sq.ft. single occupancy room
  • Test administrator: IAQS

Results : >99.9% Reduction of RPC & Odor Intensity

“The indoor air quality of Room 208 was reported to be heavily laden with untypical levels of odors, volatile organic compounds (TVOC), formaldehyde (HCHO), PM 2.5 (particle mass) and RPC (respirable particles between .3 and 10.0 microns).  After operation of the Greentech HEPA+ Pro unit, these levels were quickly decreased and were sustained at lower levels more consistent within current Guidelines and Standards.”

– Keith Roe, IAQS

NAME TYPE REDUCED
TVOC Airborne ~62.00%
Odor Intensity Airborne >99.90%
HCHO (fomaldehyde) Airborne >71.00%
PM 2.5 Airborne >50.00%
PM 10 Airborne >68.00%
Respirable Particle Counts Airborne >99.90%

Extended Care: Mold, Odors, & Ozone

Greentech Active HEPA+
  • Product : Active HEPA+ Room
  • Technologies: PCO/BPI/HEPA/ODOGard
  • Test time: 5 days total – measured in real time
  • Test space: 13’x16’x8′ double occupancy room
  • Test administrator: IAQS

Results : >90.00% Odor Elimination. Significant and sustained reduction of PM & RPC counts.

“This room presented a challenging environment, occupied by two incontinent male patients and serviced only by a ductless wall unit with an unrated pre-filter. The related spikes observed in odors and other pollutants during testing did not linger and were ultimately reduced and sustained. Also, the significant and sustained reduction in PM 2.5/10.0 and RPC counts was a direct result of the efficacy of the ODOGard HEPA filter. These pollutants represent some of the most significant respiratory health concerns in a healthcare facility as well as airborne diseases.”

– Keith Roe, IAQS

NAME TYPE REDUCED
Mold Spores Airborne 67.00%
Odor Intensity Airborne 90.00%
Ozone Levels Airborne Below Detectable

HVAC Lab Test Results

Lab Test: Surface Inactivation of SARS-CoV-2

Greentech Active HEPA+
  • Product : pureAir HVAC
  • Technologies: PCO/BPI
  • Test time: 4 Hours
  • Surface type: Stainless Steel
  • Test space: Test chamber 9x9x9 ft
  • Test location: MRIGlobal

Results : 86.98% Inactivation of SARS-CoV-2 on Surfaces

These tests conclude that the purAir HVAC PCO + BPI technology is effective at reducing surface SARS-CoV-2 infectivity in vitro after 4h of exposure.

Test samples had 0.89 log (86.98%) lower infectivity of SARS-CoV-2 as compared to control samples.

TYPE REDUCED TIME SPACE LOCATION MODEL DATE
Surface 86.98% 4 hours 9x9x9′ Chamber MRIGlobal pureAir HVAC (50% O3) 7/2021

Lab Test: Surface Inactivation of MRSA (4 Models)

Greentech Active HEPA+
  • Product : pureAir HVAC
  • Technologies: PCO/O3 (20%)
  • Test time: 6 Hours
  • Surface type: Glass
  • Test space: Test chamber
  • Test location: Microchem

Results : >99.99% Inactivation of MRSA on Surfaces (PCO, 20% O3) 

These tests conclude that the pureAir HVAC purAir HVAC PCO + O3 technology is effective at reducing surface MRSA infectivity in vitro after 6h of exposure.

Test samples had  >4.75 log (>99.99%) lower infectivity of MRSA as compared to control samples.

Test also demonstrated that the pureAir HVAC technologies did not raise PPM of H2O2 or O3 in the chamber during the experiment.

Greentech Active HEPA+
  • Product : pureAir HVAC
  • Technologies: PCO/BPI/O3 (20%)
  • Test time: 6 Hours
  • Surface type: Glass
  • Test space: Test chamber
  • Test location: Microchem

Results : 93.9% Inactivation of MRSA on Surfaces (PCO, BPI, 20% O3) 

These tests conclude that the pureAir HVAC purAir HVAC PCO + BPI + O3 technology is effective at reducing surface MRSA infectivity in vitro after 6h of exposure.

Test samples had  1.26 log (93.9%) lower infectivity of MRSA as compared to control samples.

Test also demonstrated that the pureAir HVAC technologies did not significantly raise PPM of H2O2 or O3 in the chamber during the experiment.

Greentech Active HEPA+
  • Product : pureAir HVAC
  • Technologies: PCO/BPI
  • Test time: 6 Hours
  • Surface type: Glass
  • Test space: Test chamber
  • Test location: Microchem

Results : 69.6% Inactivation of MRSA on Surfaces (NO3 Model) 

These tests conclude that the pureAir HVAC purAir HVAC PCO + BPI technology is effective at reducing surface MRSA infectivity in vitro after 6h of exposure.

Test samples had  .61 log (69.6%) lower infectivity of MRSA as compared to control samples.

Test also demonstrated that the pureAir HVAC technologies did not raise PPM of H2O2 or O3 in the chamber during the experiment.

NAME: S. aures (MRSA)

TYPE REDUCED TIME SPACE LOCATION MODEL DATE
Surface 69.61% 6 hours Controlled Chamber Michrochem pureAir HVAC (PCO/BPI/No O3) 8/2021
Surface >99.99% 6 hours Controlled Chamber Michrochem pureAir HVAC (PCO/20% O3) 8/2021
Surface 93.93% 6 hours Controlled Chamber Michrochem pureAir HVAC (PCO/BPI/20% O3) 8/2021
Surface >99.95% 6 hours Controlled Chamber Michrochem pureAir HVAC (50% O3) 11/2020

HVAC Field Test Results

Offices: TVOC, Pathogens & Particulate Matter

Greentech Active HEPA+
  • Product : pureAir HVAC
  • Technologies: PCO/BPI
  • Test time: 5 Days tital – real time measurements
  • Test space: Commercial Office Space
  • Test location: IAQS

Results : 95% Reduction of Airborne Mold, Bacteria, TVOC, and 90% Reduction of Surface Bacteria

“It is my considered observation that pureAir HVAC does provide a rapid and significant reduction of the typical contaminants tested. The levels achieved and maintained during this test were far below any known standard or established TLV. It is my considered opinion that this sustained condition would not be typical or possible without the continuous use of this product.” – Keith Roe, IAQS

Ozone levels throughout the duration of the test remained below TLV guidance and below levels measured outdoors.

NAME TYPE REDUCED
Mold Spores Airborne >99.99%
Mold Spores Surface 50.00%
Bacteria Counts Airborne >95.00%
Bacteria Counts Surface 90.00%
TVOC Airborne >99.00%
HCHO (formaldehyde) Airborne >99.90%
PM 2.5/10.0 Airborne >61.00%
Respirable Particle Counts Airborne >62.00%
Greentech Active HEPA+
  • Product : pureAir HVAC + Treated Filter
  • Technologies: PCO/BPI/ODOGard® MERV 13
  • Test time: 5 Days total – real time measurements
  • Test space: 1240 sq. ft. room
  • Test location: IAQS

Results : >99% Reduction of Airborne Mold, Bacteria, TVOC, and Odors

“It is my considered observation that pureAir HVAC in combination with an ODOGard coated filter does provide a rapid and significant reduction of the typical air and surface contaminants tested.  In my considered opinion, the sustained condition would not be achievable without the continual use of the technology represented.“

– Keith Roe, IAQS

Ozone levels were 0 ppm throughout the duration of the test.

NAME TYPE REDUCED
Mold Spores Airborne >99.94%
Bacteria Counts Airborne >99.99%
TVOC Airborne >99.99%
HCHO (formaldehyde) Airborne >99.99%
Odor Intensity Airborne >99.99%

3000+ Lab Test Results

Lab Test: Surface Inactivation of SARS-CoV-2

Greentech Active HEPA+
  • Product : pureAir 3000+
  • Technologies: PCO/MERV/ODOGard
  • Test time: 5:30 minutes
  • Air exchange equivalent: 10
  • Test space: Class III Biosafety Cabinet, 2.5×3.5×1.5 ft
  • Test location: MRIGlobal

Results : 99.98% Inactivation of SARS-CoV-2

These tests conclude that the 3000+ is highly effective at reducing the infectivity of aerosolized SARS-CoV-2 virus with a 3.71 log (99.98%) reduction within five minutes and thirty seconds (5:30) of operation in relation to baseline control results.

These results also show that 3000+ had a reduction in aerosol mass and median size within the five minutes and thirty seconds (5:30) of operation, with a mass removal of approximately 1 logs.

While particle mass reductions of only 1 log was observed, 3000+ demonstrated viral infectivity reductions greater than 3.5 logs, which supports the hypotheses that both active and passive technologies contribute to overall product efficacy.

3000+ Field Test Results

TVOC, Pathogens & Particulate Matter

Greentech Active HEPA+
  • Product : pureAir 3000+
  • Technologies: PCO/ODOGard®
  • Test time: 5 Days total – real time measurements
  • Test space: Commercial Office
  • Test location: IAQS

Results : 90% Reduction of Respirable Particle Counts

“The sustained significant reduction of PM contaminants in the test area would not be expected or typical. This would demonstrate the effectiveness of the active passive technology provided by the Greentech unit. These lowered results were not exhibited in the indoor control area readings without the equipment.” – Keith Roe, IAQS

There was no detectable level of ozone.

NAME TYPE REDUCED
PM 2.5/10.0 Airborne 64.00%
Respirable Body Counts Airborne 90.00%
Greentech Active HEPA+
  • Product : pureAir 3000+
  • Technologies: PCO/ODOGard®
  • Test time: 5 Days total – real time measurements
  • Test space: 1200sq. ft. Nail Salon
  • Test location: IAQS

Results : 83% Reduction of RPC and 60% Reduction of TVOC

“Nail salons are a harsh indoor air environment, with contaminants continuously being introduced. Both qualitatively and quantitatively, there was a measurable and significant decrease in all air pollutants monitored as well as the presence of odors. The ongoing source of air pollutants was ever changing and fluctuating in intensity, but the decreases that were reported were during the working day when they collectively were at their peak.” – Keith Roe, IAQS

There was no detectable level of ozone.

NAME TYPE REDUCED
TVOC Airborne 60.00%
HCHO (formaldehyde) Airborne 57.00%
Respirable Particle Counts Airborne 83.00%
PM 2.5 Airborne 68.00%
PM 10.0 Airborne 78.00%

750+ Wall Mount Lab Test Results

Lab Test: Aerosol Deactivation of MS2*

Greentech Active HEPA+
  • Product : 750+ Wall Mount
  • Technologies: PCO/O3/ODOGard
  • Test time: 4 Hours
  • Test space: 9.1’x9.1’x7.0′ (759 cubic feet) Sealed Test Chamber
  • Test location: Aerosol Research and Engineering Laboratories
  • Testing done in compliance with FDA Good Lab Practices (GLP)

Results : 98.21% Bioaerosol Reduction of MS2 (*A known surrogate for influenza and SARS-CoV-2)

The 750+ Wall Mount was effective at reducing the aerosolized MS2 virus by an average net log of 1.86 ± 0.38 (equivalent to 98.2053% ± 1.6532% reduction) within 4 hours (240 min).

This device is capable of reducing the bio-aerosols in air.

750+ Wall Mount Field Test Results

Offices: Pathogens, TVOC, & Formaldehyde

Greentech Active HEPA+
  • Product : 750+ Wall Mount
  • Technologies: PCO/BPI/ODOGard
  • Test time: 5 days total – Measured in real time
  • Test space: 1240 sq. ft. commercial space
  • Test administrator: IAQS

Results : 97.0% reduction of surface mold and bacteria and 90.0% reduction airborne mold and TVOC

“It is my considered observation that 750+ Wall Mount in combination with an ODOGard coated pre-filter does provide a significant reduction of the typical air and surface contaminants tested. ASHRAE provides guidance as to the use of supplemental air purification and disinfection equipment after increasing fresh air ventilation rate to a minimum of 6 air changes per hour and filtration levels to a MERV 13 level. This study was performed without those improvements. It is my considered opinion that if this unit was used within the current ASHRAE guidelines an even  greater efficacy could be expected.” – Keith Roe, IAQS

Ozone levels were 0 ppm throughout the duration of the test.

NAME TYPE REDUCED
Mold Spores Airborne 93.00%
Mold Spores Surface 97.00%
Bacteria Counts Airborne 63.00%
Bacteria Counts Surface 97.50%
TVOC Airborne 92.00%
HCHO (Formaldehyde) Airborne 94.00%

Educational Facility: TVOC, Mold, Particulate Matter

Greentech Active HEPA+
  • Product : 750+ Wall Mount
  • Technologies: PCO/O3
  • Test time: 5 days total – Measured in real time
  • Test space: 3500 cubic ft. cleaning products storage room
  • Test administrator: IAQS

Results : 95.0% reduction of TVOC

“It was observed and recorded throughout the project that the introduction of ozone as part of the AOP process produced the best overall reduction of contaminants and sustained air quality. There was a significant reduction of TVOC and HCHO from the initial readings which would not have been expected to occur without the introduction of this combined technology.” – Keith Roe, IAQS

Ozone levels throughout the duration of the test remained below TLV guidance and below levels measured outdoors.

NAME TYPE REDUCED
Mold Spores Airborne 93.00%
Mold Spores Surface 97.00%
Bacteria Counts Airborne 63.00%
Bacteria Counts Surface 97.50%
TVOC Airborne 92.00%
HCHO (Formaldehyde) Airborne 94.00%
Greentech Active HEPA+
  • Product : 750+ Wall Mount
  • Technologies: PCO/O3/ODOGard® Treated Filter
  • Test time: 5 days total – Measured in real time
  • Test space: 900 sq. ft. unoccupied classroom
  • Test administrator: IAQS

Results : Achieved improved air quality that remained within targeted levels for healthy indoor air.

“It is my observation that the areas containing units demonstrated a more desirable IAQ when compared to outside conditions  and controlled spaces that were more variable and often elevated in that urban setting. The occupied classroom presents a significant IAQ issue that would benefit from air purification as it consistently showed TVOC levels higher than recommended by healthy air standards.” – Keith Roe, IAQS

Ozone levels were below detectable levels throughout the test period.

NAME TYPE REDUCED
Mold Spores Airborne Up to 99.9%
TVOC Airborne Within Safe Levels
PM 2.5 Airborne ~50.00%
PM 10.0 Airborne ~44.00%
Respirable Particle Counts Airborne 20.0% Less than Control
Ozone Levels Airborne Below Detectable
Greentech Active HEPA+
  • Product : 750+ Wall Mount
  • Technologies: PCO/O3/ODOGard® Treated Filter
  • Test time: 11 days total – Measured in real time
  • Test space: 4800 sq. ft. Cafeteria
  • Test administrator: IAQS

Results : Achieved improved air quality that remained within targeted levels for healthy indoor air.

“It is my observation that the areas containing units demonstrated a more desirable IAQ when compared to outside conditions  and controlled spaces that were more variable and often elevated in that urban setting. The occupied space presents a significant IAQ issue that would benefit from air purification as it consistently showed TVOC levels higher than recommended by healthy air standards.” – Keith Roe, IAQS

Ozone levels were below detectable levels throughout the test period.

NAME TYPE REDUCED
Mold Spores Airborne ~50.0%
TVOC Airborne Within Safe Levels
PM 2.5 Airborne ~45.00%
PM 10.0 Airborne ~41.00%
Ozone Levels Airborne Below Detectable
Greentech Active HEPA+
  • Product : 750+ Wall Mount
  • Technologies: PCO/O3/ODOGard® Treated Filter
  • Test time: 5 days total – Measured in real time
  • Test space: 220 sq. ft. School Bus
  • Test administrator: IAQS

Results : Achieved improved air quality that remained within targeted levels for healthy indoor air.

“It is my observation and considered opinion that the Greentech technology had a significant affect on stabilizing the indoor air environment as well as definitively reducing airborne contaminants as defined by the readings. No single technology alone would produce those results.” – Keith Roe, IAQS

Ozone levels were below detectable levels throughout the test period.

NAME TYPE REDUCED
Mold Spores Airborne ~81.00%
TVOC Airborne ~79.00%
HCHO (Formaldehyde) Airborne ~80.00%
Respirable Particle Counts Airborne ~50.00%
Ozone Levels Airborne Below Detectable
Odor Intensity Airborne >95.00%

Additional Product Studies

PTAC: Pathogens, TVOC, & Formaldehyde

Greentech Active HEPA+
  • Product : PTAC
  • Technologies: PCO
  • Test time: 5 days total – Measured in real time
  • Test space: 220 sq. ft. Dorm Rooms
  • Test administrator: IAQS

Results : 90.0% reduction of TVOC and >99.99% reduction of mold spores on fan/coil

“The use of the pureAir PTAC unit completely removed the viable mold spores found on the fan housing and coil surfaces of the PTAC units. These results were the same whether the PTAC unit was operated continuously or as to temperature demand. The total mold spore counts in each room were also significantly reduced from previous levels and as compared to control levels. PM2.5/PM10.0, RPC, and TVOC were also reduced to untypically lower levels.

It would be my considered opinion that pureAir PTAC would serve as an effective deterrent to mold growth on and in a PTAC unit. It would also be expected to produce a sustained and improved overall indoor air quality within the serviced areas.” – Keith Roe, IAQS

NAME TYPE REDUCED
Mold Spores Airborne 70.00%
Mold Spores Surface (Fan/Coil) >99.99%
TVOC Airborne >90.00%
HCHO (Formaldehyde) Airborne >90.00%
PM 2.5/10 & RPC Airborne >50.00%

pureAir 50: TVOC & HCHO

Greentech Active HEPA+
  • Product: pureAir 50
  • Technologies: O3
  • Test time: 5 days total – Measured in real time
  • Test space: Office
  • Test administrator: IAQS

Results : 99.99% reduction of TVOC

“It was observed and recorded throughout the project that the introduction of ozone as part of the AOP process produced the best overall reduction of contaminants and sustained air quality. There was a significant reduction of TVOC and HCHO from the initial readings which would not have been expected to occur without the introduction of this combined technology.” – Keith Roe, IAQS

Ozone levels throughout the duration of the test remained below TLV guidance and below levels measured outdoors.