Airdog X1D 14.6nm Particle Removal Test: What the Laboratory Data Shows

Independent laboratory testing evaluated the particle removal performance of Airdog X1D against ultrafine particles down to 14.6 nm.

When people compare air purifiers, particle removal is often discussed in terms of PM2.5 or other relatively large particle categories.

But what happens when the particle size becomes much smaller?

To better understand the particle removal capability of Airdog X1D, an independent laboratory test evaluated its performance against particles at 14.6 nm, 51.4 nm, and 101.8 nm under controlled test conditions.

The results show that Airdog X1D progressively reduced the measured particle concentrations over the test period. At the end of the 50-minute test, the measured fractional removal efficiency reached 100% for all three tested particle sizes, including 14.6 nm.

Important: These results represent the conditions and test procedure described in the laboratory report. They should not be interpreted as a claim that 100% removal occurs instantly or under every real-world condition.

Airdog X1D Particle Removal Test at a Glance

The report identifies the tested product as an Airdog X1D air purifier and records Suzhou BeiAng Smart Technology Co., Ltd. as the manufacturer. The test was conducted at the Suzhou Institute of Metrology, with the test report signed and issued on October 26, 2023.

Why Test Particle Size Down to 14.6 nm?

Particle size matters when evaluating air-cleaning technologies.

A 14.6 nm particle is extremely small—far below the particle size commonly used when consumers discuss PM2.5. It is also far lower than the particles as small as 0.3 microns that HEPA filters claim to filter.

The purpose of this test was not simply to produce a large marketing number. Instead, the laboratory evaluated particle concentrations at several specific nanometer-scale particle sizes:

14.6 nm  /  51.4 nm  /  101.8 nm

Testing multiple particle sizes provides a broader picture of how particle concentration changes during the purification process.

The report used a TSI SMPS-3938 Scanning Electromobility Particle Size Spectrometer to measure particle concentrations. TSI describes its SMPS 3938 platform as a system designed for measuring airborne submicron and nanoparticle size distributions, with configurations covering nanometer-scale particles.

How Was the Airdog X1D Tested?

The laboratory test was conducted in a controlled 30 m³ environmental test chamber.

The test procedure included two important stages:

Stage 1 — Natural Decay Test

Before evaluating the purifier, the laboratory measured how particle concentrations changed naturally without the purifier operating.

Stage 2 — Particle Removal Test

The Airdog X1D was then operated and particle concentrations were measured continuously.

The laboratory report states that:

· Ambient air was used as the particle source.

· The temperature was controlled at approximately 25 ± 2°C.

· Relative humidity was controlled at approximately 50 ± 10%.

· The circulating fan was operated.

· The TSI SMPS-3938 was configured with 64 channels.

· Particle concentrations at 14.6 nm, 51.4 nm and 101.8 nm were recorded every two minutes.

· The test continued for 25 consecutive measurements over 50 minutes.

This methodology is important because it provides a defined and repeatable laboratory environment rather than relying on an uncontrolled indoor space.

Why Did the Laboratory Measure Natural Particle Decay?

This is one of the most important details in the report.

Particles can decrease naturally even when an air purifier is not operating.

For example, particles may change concentration because of natural settling, diffusion or other environmental effects.

Therefore, the laboratory first performed a Natural Decay Efficiency Test.

In this stage, the air purifier was not operating, and the laboratory continuously monitored the particle concentrations.

For example, at the beginning of the natural-decay test, the measured concentrations were:

After 50 minutes without the air purifier operating, the measured concentrations were:

The calculated natural decay efficiencies at 50 minutes were 43.06%, 31.69% and 15.80%, respectively.

This provides important context for interpreting the subsequent air purifier test.

What Happened When Airdog X1D Was Operating?

The second test measured particle removal while the Airdog X1D was operating.

The laboratory calculated particle removal efficiency according to the particle concentration measured at the beginning of the test and the concentration at each subsequent time point.

The results show a clear reduction in particle concentration over time.

Selected results from the laboratory data

These values are taken from the particle matter fractional-efficiency table in the original laboratory report.

What Does the 14.6 nm Result Actually Mean?

The most notable result is the performance at 14.6 nm.

The measured removal efficiency developed as follows:

Therefore, the most scientifically accurate way to describe the result is:

Under the specified laboratory test conditions, Airdog X1D reached a measured particle removal efficiency of 100% for 14.6 nm particles at the end of the 50-minute test period.

What Does This Test Demonstrate?

Based on the laboratory report, the test demonstrates that:

· Airdog X1D was evaluated under controlled laboratory conditions.

· Particle sizes of 14.6 nm, 51.4 nm and 101.8 nm were measured.

· Particle concentrations were monitored at two-minute intervals.

· The test lasted 50 minutes.

· The measured fractional removal efficiency increased substantially during the test.

· At 50 minutes, the reported removal efficiency reached 100% for all three tested particle sizes.

Most importantly, the 14.6 nm result was not an assumed specification. It was part of a specific laboratory test with recorded particle concentration data.

What Does 14.6 nm Tell Us About Airdog X1D?

The significance of this test is not simply the number 14.6 nm.

It is the fact that Airdog X1D was evaluated at a particle size substantially below the particle sizes most commonly used in everyday consumer discussions of air purification.

The test therefore provides an additional piece of evidence for understanding Airdog's ability to reduce very small airborne particles.

For Airdog, this is particularly relevant when discussing TPA air-cleaning technology, because particle removal should be understood as a process involving the interaction between particles, airflow and the air-cleaning system—not simply as a comparison between particle diameter and a physical filter opening.

The technology and principles of Airdog X1D

TPA technology is an electrostatic air purification system used in Airdog air purifiers.

TPA stands for Two Pole Active purification technology. Instead of trapping particles through dense disposable HEPA filters, TPA technology charges airborne particles and collects them on washable electrostatic collection plates.

The washable collection plates can be cleaned and reused, which may help lower long-term maintenance costs compared with traditional disposable filter systems.

This design helps maintain stronger airflow while reducing the need for frequent filter replacement.

Conclusion

The value of the Airdog X1D 14.6 nm test is not simply the final 100% number.

Its stronger value lies in the complete evidence chain:

Controlled test environment → natural decay measurement → nanometer-scale particle measurement → continuous time-series data → calculated particle removal efficiency → original laboratory report.

In the Airdog X1D particle removal test report, under the conditions specified, Airdog X1D progressively reduced measured particle concentrations at 14.6 nm, 51.4 nm and 101.8 nm, reaching 100% reported particle removal efficiency at all three tested sizes at the end of the 50-minute test period.