Views: 325 Author: Site Editor Publish Time: 2026-09-14 Origin: Site
If you have searched for “How does Airdog work?” or “How does the Airdog TPA filter work?”, the short answer is:
Airdog's patented TPA® technology uses an electrical field to charge airborne particles, attract them to reusable collecting plates, and remove them from the air.
Unlike conventional disposable filters that primarily rely on mechanical filtration, the TPA system actively interacts with airborne particles through a multi-stage electrical purification process.
But how does it actually work?
Let's look at the process step by step.
TPA® stands for Two-Pole Active technology.
It is an active air-filtration technology developed by Airdog that combines electrical fields, particle charging, particle collection, airflow design, and additional filtration stages.
The basic principle is different from a conventional filter.
A traditional mechanical filter captures particles as air passes through a filter material. Airdog's TPA system first electrically charges fine airborne particles and then uses an electric field to attract those particles onto collecting plates.
The collecting plates can then be removed and washed for reuse.
This is one of the key reasons Airdog can use a washable and reusable collection system instead of relying on regularly replaced disposable filter media.
The Airdog purification system can be understood as a multi-stage process:
Pre-filter → Particle Charging → Ionic Field → Particle Collection → Catalyst Filtration
Each stage performs a different function.
The purification process starts when indoor air enters the Airdog air purifier.
The pre-filter captures larger contaminants such as:
Hair
Pet fur
Larger dust particles
Pet dander
Other visible debris
This first stage helps protect the downstream purification components and prepares the air for the electrical filtration process.
After passing through the pre-filter, smaller airborne particles enter the wire-frame section.
Here, an electrical field is created around the electrode structure.
Particles passing through this area can acquire an electrical charge.
This step is important because electrically charged particles can subsequently be manipulated by an electric field.
In simple terms:
The system gives airborne particles an electrical “charge” so they can be actively captured.
The charged particles then enter the high-voltage ionic field.
Airdog's TPA system uses a high-voltage electric field between its electrode components. The electrical field interacts with airborne particles and microorganisms as they pass through the purification system.
Airdog's technical materials describe a high-voltage field in the range of approximately 20,000–40,000 volts, depending on the system and configuration.
The important point is not simply the voltage itself.
The key is how the electrical field is used as part of the particle-charging and collection process.
Please note that there are protective measures inside, and high voltage will not spill out. Here, there will be an Ion Chamber, which will create a containment area. At the same time, we also implemented another security measure. When the Airdog air purifier is still in standby mode, if the rear cover is removed, the Airdog air purifier will automatically shut down.
Once the particles have been electrically charged, they move toward the collecting plates.
The collecting plates are designed to attract and hold the charged particles.
Instead of allowing contaminants to continue circulating in the room, the particles are collected inside the air purifier.
This is the fundamental charge-and-collect principle behind Airdog's TPA technology:
Charge the particles → attract the particles → collect the particles
The collecting plates can then be removed and cleaned.
After the electrical purification stages, the air passes through the catalyst filter.
This stage provides additional treatment for odors and certain gaseous contaminants.
The catalyst stage is therefore different from the collecting plates:
The collecting plates primarily deal with captured particulate matter.
The catalyst filter provides additional odor-related treatment.
Together, these stages create a multi-stage purification system.
This is one of the most common questions about Airdog.
A conventional disposable filter generally relies on a fibrous filter medium to physically capture particles. As particles accumulate, the filter becomes increasingly loaded and eventually needs to be replaced.
Airdog's TPA collection system works differently.
Fine particles are electrically charged and then collected on dedicated collecting plates rather than being primarily trapped throughout a disposable fibrous filter medium.
When the collecting plates become contaminated, they can be removed and cleaned according to the product's maintenance instructions.
After cleaning and drying, the collecting system can be reused.
This creates a different maintenance model:
Traditional disposable filter:
Air → Mechanical filter → Particle accumulation → Filter replacement
Airdog TPA system:
Air → Particle charging → Electrical collection → Wash → Reuse
The result is a filtration system designed around washable components rather than routine replacement of the main particle-collection system.
Not exactly.
This distinction is important.
A conventional room ionizer typically releases ions into the surrounding air. These ions can interact with airborne particles and cause them to become charged or agglomerate.
Airdog's TPA technology also uses ionization and electrical fields, but the purification process is designed to take place inside the air purifier, where charged particles are subsequently collected by dedicated collecting plates.
In other words, Airdog is not simply relying on airborne ions to make particles settle onto furniture or other surfaces.
The TPA system combines:
particle charging + electrical field + collection plates
to actively remove particles from the air stream.
The simplest way to understand the difference is to look at the basic filtration mechanisms.
TPA Technology | Conventional HEPA Filtration |
Active electrical filtration | Passive mechanical filtration |
Electrically charges particles | Captures particles through filter media |
Uses collecting plates | Uses fibrous filter material |
Main collection components can be washed | Filter media normally requires replacement |
Designed for reusable particle collection | Designed around disposable/replacement filters |
This does not mean that every TPA system is automatically better than every HEPA system.
The real-world performance of an air purifier depends on many factors, including:
Particle removal efficiency
Airflow
CADR
Room size
Filter design
Operating time
Maintenance
Testing conditions
The important difference is that TPA and HEPA use fundamentally different approaches to particle filtration.
Airdog's published technical and laboratory materials report particle capture performance down to 0.0146 μm (14.6 nm) for Airdog series air purifiers and tests.
For example, Airdog's X1 materials describe TPA technology as capturing particles down to 0.0146 μm.
This is another important difference between TPA and conventional filtration.
The particles collected by the collecting plates remain inside the air purifier rather than simply being released back into the room.
During routine maintenance, the collecting components can be removed and cleaned according to the product's instructions.
This allows accumulated particulate matter to be physically removed from the purification system.
For this reason, the maintenance process is an important part of using an Airdog purifier correctly.
The purpose of TPA is not simply to create a different type of filter.
It was designed around several practical goals:
Instead of relying only on passive mechanical filtration, TPA uses an electrical field to actively charge and collect particles.
The collecting plates can be cleaned and reused rather than routinely discarded.
Because the primary particle-collection system is reusable, users can reduce their dependence on recurring disposable filter replacements.
Cleaning the collection system becomes part of routine maintenance instead of regularly purchasing and replacing the main particle filter.
In one sentence:
Airdog's TPA technology electrically charges airborne particles, uses an electric field to attract them, collects them on washable plates, and provides additional treatment through downstream filtration stages.
Or, even more simply:
Charge → Attract → Collect → Clean → Reuse
That is the basic idea behind the Airdog TPA filtration system.
If you are comparing Airdog with a conventional HEPA purifier, the most important thing to understand is not simply the name of the filter, but how each technology captures particles, how performance changes with use, and how the filtration system is maintained over time.
For product-specific performance, always refer to the test data and specifications for the individual Airdog model.
