Air Filtration Solutions – HVAC, Cleanroom and Industrial Air Filtration

Air Filtration Solutions are integrated approaches used to control airborne particles, dust, PM10, PM2.5, PM1, odors, selected VOCs and other airborne contaminants in HVAC, cleanroom, commercial and industrial environments.

An effective solution is not simply a matter of choosing one air filter. It requires the correct combination of filter efficiency, airflow, pressure drop, media type, number of filtration stages, system sealing, installation position and maintenance strategy.

VIETPHAT provides Air Filtration Solutions using Pre Filters, Panel Filters, Pleated Filters, Bag Filters, Pocket Filters, Fine Air Filters, Compact Filters, V-Bank Filters, Activated Carbon Filters, HEPA Filters, ULPA Filters, Paint Booth Filters, High Temperature Filters and custom filtration products for commercial, industrial and controlled-environment applications.

What Are Air Filtration Solutions?

Air Filtration Solutions are engineered filtration arrangements developed according to the actual contamination-control requirements of an air-handling or process system.

A complete solution may include:

• Outdoor-air pre filtration.
• Intermediate particulate filtration.
• Fine particulate filtration.
• HEPA or ULPA final filtration.
• Activated carbon or molecular filtration.
• Paint overspray filtration.
• High-temperature filtration.
• Custom filter housings and replacement configurations.
• Differential pressure monitoring.
• Filter replacement planning.

Why Is Air Filtration Important?

Airborne contaminants can affect:

• Indoor air quality.
• HVAC equipment.
• Cooling and heating coils.
• Fans and ductwork.
• Product quality.
• Cleanroom performance.
• Production equipment.
• Electronic components.
• Paint finish quality.
• Maintenance cost.

Correct air filtration helps reduce contamination while maintaining suitable airflow and energy performance.

Main Airborne Contaminants

Coarse Dust

Coarse particles may include:

• Fibers.
• Lint.
• Large dust particles.
• Pollen.
• Construction dust.

Fine Particulate Matter

Fine particulate contamination may include:

• PM10.
• PM2.5.
• PM1.
• Industrial fine dust.
• Combustion particles.

High-Efficiency Particulate Contamination

Critical environments may require control of much smaller airborne particles using HEPA or ULPA filtration.

Gaseous Contaminants

Gas-phase contaminants may include:

• Odors.
• Selected VOCs.
• Organic vapors.
• Acid gases.
• Basic gases.
• Corrosive gases.

Process Contaminants

Industrial processes may also generate:

• Paint overspray.
• Wood dust.
• Powder.
• Process fumes.
• Chemical contaminants.

How Do Air Filtration Solutions Work?

Different contaminants require different filtration technologies.

Particulate filters commonly capture particles through mechanisms including:

• Inertial impaction.
• Interception.
• Diffusion.
• Electrostatic effects in selected media.

Gas-phase filtration works differently and may use:

• Adsorption.
• Chemisorption.
• Specialized molecular media.

Paint booth overspray filters use media structures designed specifically to capture droplets and coating solids.

Multi-Stage Air Filtration Solutions

Many HVAC and industrial systems perform better with several filtration stages rather than one high-efficiency filter.

Two-Stage Filtration

• Stage 1: Pre Filter.
• Stage 2: Bag, Fine, Compact or V-Bank Filter.

Three-Stage Filtration

• Stage 1: Pre Filter.
• Stage 2: Fine Filter.
• Stage 3: HEPA Filter where required.

Particulate + Gas-Phase Filtration

• Stage 1: Pre Filter.
• Stage 2: Fine Filter.
• Stage 3: Activated Carbon or Molecular Filter.

Why Use Pre-Filtration?

Pre-filtration is one of the most important parts of a well-designed filtration solution.

It can help:

• Capture larger particles.
• Protect coils.
• Reduce loading on Fine Filters.
• Extend HEPA service life.
• Protect activated carbon media from dust.
• Reduce maintenance cost.

Main Types of Air Filters Used in Air Filtration Solutions

1. Pre Air Filters

Pre Air Filters provide the first stage of particulate filtration.

They are commonly used in:

• AHUs.
• Fresh-air systems.
• Industrial ventilation.
• Commercial HVAC.

2. Panel Air Filters

Panel Filters are compact filters used for primary or intermediate filtration.

Common media include:

• Synthetic fiber.
• Polyester.
• Pleated synthetic media.

3. Pleated Air Filters

Pleated Air Filters increase effective media area through folded construction.

They may provide:

• Higher dust-holding capacity.
• Improved particulate filtration.
• Compact installation.

4. Bag Air Filters

Bag Filters or Pocket Filters are commonly used as intermediate or fine filtration stages in AHUs.

Their large media area can support high airflow and good dust-holding capacity.

5. Fine Air Filters

Fine Air Filters are used to reduce smaller particles.

Depending on tested ISO 16890 performance, they may be classified as:

• ePM10.
• ePM2.5.
• ePM1.

6. Compact Air Filters

Compact Filters provide extended media area in a rigid housing.

They are suitable for commercial and industrial HVAC systems requiring improved filtration in limited installation depth.

7. V-Bank Air Filters

V-Bank Air Filters use multiple pleated media packs arranged in a V configuration.

They may provide:

• Large media area.
• High airflow capacity.
• Compact depth.
• High fine-particle filtration performance.

8. Activated Carbon Air Filters

Activated Carbon Filters are used for selected gas and odor control.

They may help reduce:

• Odors.
• Selected VOCs.
• Organic vapors.
• Selected gaseous contaminants.

Standard activated carbon should not be assumed to remove every gas.

9. HEPA Air Filters

HEPA Filters provide high-efficiency particulate filtration for critical applications.

Common classes include:

• H13.
• H14.

They are commonly used in:

• Cleanrooms.
• Hospitals.
• Pharmaceutical plants.
• Food production.
• Laboratories.

10. ULPA Air Filters

ULPA Filters are used for extremely high particle-control requirements.

Typical applications include:

• Semiconductor cleanrooms.
• Microelectronics facilities.
• Advanced FFUs.

11. Paint Booth Filters

Paint booth filtration requires specialized products including:

• Intake Pre Filters.
• Ceiling Filters.
• Fiberglass Paint Arrestors.
• Floor Filters.
• Paper Paint Filters.

12. High Temperature Air Filters

High Temperature Filters are designed for elevated-temperature applications such as:

• Industrial ovens.
• Paint curing systems.
• Dryers.
• Pharmaceutical ovens.
• Depyrogenation applications.

Air Filtration Technologies at a Glance

Filtration Technology	Main Contaminant	Typical Application
Pre Filtration	Coarse dust	AHU / HVAC / Fresh Air
Fine Filtration	PM10 / PM2.5 / PM1	Commercial / Industrial HVAC
HEPA Filtration	Very fine particles	Cleanroom / Hospital / Pharma
ULPA Filtration	Ultra-fine particles	Semiconductor / Microelectronics
Activated Carbon	Selected odors / VOCs	Commercial / Industrial HVAC
Molecular Filtration	Selected gases / AMC	Semiconductor / Industrial
Paint Arrestor	Paint overspray	Spray Booth
High Temperature Filtration	Particles in heated air	Ovens / Dryers / Curing

Air Filtration Solutions for HVAC Systems

HVAC Air Filtration Solutions are used to:

• Protect HVAC equipment.
• Reduce airborne particulate contamination.
• Improve indoor air quality.
• Protect coils and ducts.
• Support cleaner occupied spaces.

A typical HVAC system may use Pre, Bag, Fine, Compact or V-Bank Filters depending on the required performance.

Air Filtration Solutions for AHUs

Air Handling Units are one of the most important locations for multi-stage filtration.

A typical AHU filter arrangement may include:

• Pre Filter.
• Bag or Fine Filter.
• Compact or V-Bank Filter.
• Carbon Filter where gas-phase control is required.
• HEPA Filter in selected critical applications.

Air Filtration Solutions for FCUs

Fan Coil Units generally have limited fan static pressure.

FCU filtration therefore usually focuses on:

• Low-resistance synthetic filters.
• Panel filters.
• Shallow pleated filters.

High-efficiency filters should not be added to an FCU without verifying airflow capability.

Air Filtration Solutions for Fresh-Air Systems

Outdoor-air systems can be exposed to:

• Road dust.
• Pollen.
• PM10.
• PM2.5.
• PM1.
• Industrial pollution.

Multi-stage filtration can help reduce outdoor particulate contamination before it enters occupied or production areas.

Air Filtration Solutions for Commercial Buildings

Commercial buildings require filtration that balances indoor air quality, airflow and energy consumption.

Applications include:

• Office buildings.
• Hotels.
• Shopping malls.
• Schools.
• Airports.
• Convention centers.
• Mixed-use buildings.

Typical solutions may combine Pre, Fine, Bag, Compact, V-Bank and Carbon Filters.

Air Filtration Solutions for Manufacturing Plants

Factories may require filtration for:

• General production areas.
• Assembly areas.
• Packaging zones.
• Precision manufacturing.
• Control rooms.
• Warehouses.

General HVAC filtration should not be confused with dedicated process dust collection.

Processes generating high concentrations of dust, smoke, fumes or hazardous contaminants may require dedicated:

• Dust collectors.
• Cartridge collectors.
• Baghouse systems.
• Local exhaust ventilation.
• Scrubbers.
• Other engineered process-control systems.

Air Filtration Solutions for Cleanrooms

Cleanroom Air Filtration Solutions may use several filtration stages:

• AHU Pre Filters.
• Fine Filters.
• HEPA Filters.
• ULPA Filters.
• Terminal filters.
• FFU Filters.

Cleanroom classification depends on the complete cleanroom system, including airflow pattern, air changes, room sealing, contamination sources and operating procedures.

Filter class alone does not determine the ISO cleanroom class.

Air Filtration Solutions for Hospitals

Healthcare filtration requirements vary according to room function and risk.

Solutions may include:

• Pre filtration.
• Fine filtration.
• HEPA filtration in selected critical areas.
• Gas-phase filtration where required.

Air filtration is only one part of healthcare ventilation design and should be coordinated with airflow direction, room pressure, ventilation rates and environmental control.

Air Filtration Solutions for Pharmaceutical Plants

Pharmaceutical facilities may require filtration for:

• General manufacturing areas.
• Cleanrooms.
• Laboratories.
• Filling areas.
• Packaging areas.
• Controlled production zones.

Typical solutions may use:

• Pre Filters.
• Fine Filters.
• HEPA Filters.
• ULPA Filters in selected applications.
• Molecular filtration where required.

Filter selection should form part of the complete contamination-control and qualified HVAC strategy rather than being treated as a standalone GMP solution.

Air Filtration Solutions for Food Factories

Food-processing environments may require different filtration according to hygiene zoning.

Applications include:

• Food processing areas.
• Packaging zones.
• High-care areas.
• Cold rooms.
• Dairy production.
• Beverage plants.
• Bakeries.

HEPA filtration may be used in selected high-care or highly controlled areas but is not automatically required in every food production space.

Air Filtration Solutions for Semiconductor Plants

Semiconductor manufacturing requires highly controlled air filtration because very small particles can affect product yield.

Solutions may include:

• Pre filtration.
• Fine filtration.
• HEPA filtration.
• ULPA filtration.
• FFU filtration.
• Airborne Molecular Contamination filtration.

Particulate Contamination

HEPA and ULPA Filters are used for particulate control.

Airborne Molecular Contamination

AMC requires molecular or chemical filtration using media selected according to the target contaminant.

HEPA and ULPA Filters do not remove most gaseous AMC.

Air Filtration Solutions for Data Centers

Data-center filtration may address both particulate and gaseous contamination.

Solutions may be used in:

• AHUs.
• CRAC systems.
• CRAH systems.
• Fresh-air systems.
• Air-side economizers.

Pressure drop is especially important because cooling systems often operate continuously at high airflow.

Locations with corrosive gaseous contamination may require specialized molecular filtration rather than standard activated carbon alone.

Air Filtration Solutions for Paint Booths

Paint booth filtration requires separate supply and exhaust strategies.

Supply-Air Filtration

• Pre Filters.
• Fine Filters.
• Ceiling Filters.

Exhaust Filtration

• Fiberglass Paint Arrestors.
• Floor Filters.
• Paper Paint Filters.
• Secondary overspray filters where required.

Paint overspray filtration does not automatically control gaseous VOCs.

Air Filtration Solutions for Industrial Ovens

High-temperature industrial processes require filters designed for the actual operating temperature.

Possible filtration stages include:

• Heat-resistant Pre Filters.
• High Temperature Fine Filters.
• High Temperature HEPA Filters.

All filter components, including media, frame, gasket and sealant, must be suitable for the required temperature.

Air Filtration Solutions for Electronics Manufacturing

Electronics facilities may require improved particulate filtration to reduce contamination of:

• Components.
• PCBs.
• Assemblies.
• Production equipment.

Depending on process sensitivity, Fine, HEPA or ULPA filtration may be used.

Air Filtration Solutions for Laboratories

Laboratory filtration requirements depend on the work performed.

Potential solutions include:

• Fine filtration.
• HEPA filtration.
• Carbon filtration.
• Specialized gas-phase filtration.

Containment applications may require dedicated exhaust filtration and should be engineered according to the specific hazard.

Air Filtration Solutions and ISO 16890

ISO 16890 is used for classification of general ventilation filters according to particulate matter performance.

Main groups include:

• ISO Coarse.
• ePM10.
• ePM2.5.
• ePM1.

ISO 16890 is particularly relevant for Pre, Bag, Fine, Compact and V-Bank Filters used in HVAC and AHU systems.

Former EN 779 Filter Classes

Many existing systems still use former EN 779 designations such as:

• G4.
• M5.
• M6.
• F7.
• F8.
• F9.

These terms remain common in replacement specifications, but current projects should generally review ISO 16890 performance where applicable.

Air Filtration Solutions and EN 1822

EN 1822 is relevant for high-efficiency HEPA and ULPA Filters.

Common HEPA classes include:

• H13.
• H14.

Air Filtration Solutions and ISO 29463

ISO 29463 is another international framework used for classification and testing of high-efficiency particulate filters.

For critical applications, complete filter test data, sealing and installed integrity should be considered.

ePM1 vs HEPA Filtration

An ePM1 Filter is not automatically a HEPA Filter.

ePM1 belongs to ISO 16890 general ventilation filtration, while HEPA Filters belong to a separate high-efficiency category.

H13 vs H14 HEPA Filtration

Criteria	H13	H14
Category	HEPA	HEPA
Relative Efficiency	High	Higher than H13
Typical Application	Cleanroom / Pharma / Hospital	More demanding critical areas
Selection Basis	Process requirements	Process requirements

H14 should not automatically replace H13 unless the application requires the higher class and the HVAC system can accommodate the filter characteristics.

Particulate Filtration vs Gas-Phase Filtration

Criteria	Particulate Filtration	Gas-Phase Filtration
Target	Dust and airborne particles	Selected gases / odors / VOCs
Typical Media	Synthetic / Glass Fiber	Activated Carbon / Chemisorbent
Examples	Pre / Fine / HEPA	Carbon / Molecular Filters
Replacement Indicator	Often pressure drop / condition	Media life / breakthrough / analysis

Activated Carbon Air Filtration Solutions

Activated carbon filtration can help reduce selected odors and organic vapors.

Performance depends on:

• Target chemical.
• Carbon type.
• Adsorbent quantity.
• Air velocity.
• Contact time.
• Temperature.
• Humidity.
• Contaminant concentration.

Can Activated Carbon Remove All VOCs?

No.

Different VOCs have different adsorption characteristics, and some contaminants require specialized impregnated media or other treatment technologies.

Molecular Air Filtration Solutions

Molecular filtration may use:

• Virgin activated carbon.
• Impregnated carbon.
• Chemisorption media.
• Ion-exchange media.
• Specialty blended adsorbents.

These solutions can be useful where standard particulate filtration cannot address gaseous contaminants.

Air Filtration Solutions for PM10

PM10 control commonly uses suitable general ventilation filters with tested ISO 16890 ePM10 or better performance.

Air Filtration Solutions for PM2.5

PM2.5 control may require suitable ePM2.5 or ePM1 filters depending on required performance.

Selection should be based on tested finished-filter data rather than media appearance alone.

Air Filtration Solutions for PM1

For PM1 control, ePM1 filters may be selected according to tested ISO 16890 performance.

ePM1 filtration should not be confused with HEPA filtration.

Air Filtration Solutions and Pressure Drop

Pressure Drop is a critical design parameter because every filtration stage adds airflow resistance.

Excessive total resistance can:

• Reduce airflow.
• Increase fan energy.
• Affect room pressure.
• Reduce HVAC capacity.
• Cause operational problems.

Initial Pressure Drop

Initial pressure drop is the resistance of a clean filter at a specified airflow.

Filters should be compared at equivalent operating conditions.

Final Pressure Drop

Final replacement pressure drop should consider:

• Filter manufacturer recommendations.
• Available fan static pressure.
• Required airflow.
• Energy targets.
• Maintenance strategy.

Air Filtration Solutions and Energy Efficiency

Air filtration can represent a meaningful portion of fan energy use in continuously operated HVAC systems.

An energy-conscious filtration solution should consider:

• Initial pressure drop.
• Average operating pressure drop.
• Filter loading behavior.
• Media area.
• Service life.
• Required efficiency.

Low Pressure Drop Air Filtration Solutions

Low-resistance filters can help reduce fan energy, but pressure drop should not be minimized at the expense of required filtration efficiency or dust-holding capacity.

High-Capacity Air Filtration Solutions

High-capacity Bag, Compact and V-Bank Filters can be beneficial where:

• Airflow is high.
• Outdoor dust loading is significant.
• Systems operate continuously.
• Maintenance access is limited.

Air Filter Media Selection

Media selection can include:

• Polyester.
• Polypropylene.
• Synthetic fine fiber.
• Glass fiber.
• Micro-glass fiber.
• Activated carbon.
• Impregnated carbon.
• Specialty molecular media.

The correct choice depends on the contaminant and system conditions.

Air Filter Frame Materials

Common frame materials include:

• Galvanized steel.
• Aluminum.
• Plastic.
• Cardboard in selected disposable filters.
• Stainless steel for demanding applications.

Importance of Air Filter Sealing

A high-efficiency filter can perform poorly if air bypasses around the frame.

Correct sealing is especially important for:

• HEPA Filters.
• ULPA Filters.
• Cleanroom filter banks.
• Terminal filters.

Seal configurations may include:

• Gasket seals.
• Gel seals.
• Knife-edge gel systems.

Air Filtration Solutions and Filter Housings

A suitable filter housing should:

• Hold filters securely.
• Minimize bypass.
• Allow safe replacement.
• Support required airflow.
• Provide access for maintenance.

Differential Pressure Monitoring

Differential pressure monitoring is useful for determining particulate-filter loading.

It may be applied across:

• Pre Filters.
• Bag Filters.
• Fine Filters.
• Compact Filters.
• V-Bank Filters.
• HEPA Filters.

When Should Air Filters Be Replaced?

There is no universal replacement interval for every filtration solution.

Replacement may be required when:

• Pressure drop reaches the approved limit.
• Airflow decreases.
• Media becomes damaged.
• Filter seals fail.
• Dust loading becomes excessive.
• HEPA integrity testing fails.
• Activated carbon reaches useful adsorption capacity.
• Process requirements specify replacement.

Carbon Filter Replacement

Carbon filters may become saturated without a significant increase in differential pressure.

Replacement may therefore be based on:

• Calculated media life.
• Operating hours.
• Contaminant concentration.
• Breakthrough monitoring.
• Media analysis.

Can Air Filters Be Washed?

Only filters specifically designed as washable should be cleaned and reused.

Most:

• Bag Filters.
• Fine Filters.
• Compact Filters.
• V-Bank Filters.
• HEPA Filters.
• ULPA Filters.

are normally disposable.

Air Filtration Solutions and Filter Replacement

Replacement filters should be selected according to more than dimensions alone.

Important replacement parameters include:

• Width × Height × Depth.
• Filter efficiency.
• Rated airflow.
• Initial pressure drop.
• Recommended final pressure drop.
• Media.
• Frame.
• Seal configuration.
• Application.

Custom Air Filtration Solutions

Many existing AHUs and industrial systems use non-standard filters.

Depending on product construction, custom solutions may include:

• Custom filter dimensions.
• Custom frame materials.
• Custom Bag Filter configurations.
• Custom HEPA Filters.
• Custom carbon filter modules.
• Custom paint booth media.
• Custom high-temperature filters.

How to Select the Right Air Filtration Solution

1. Identify the Application

Determine whether filtration is required for:

• Commercial HVAC.
• Factory ventilation.
• Cleanroom.
• Hospital.
• Pharmaceutical plant.
• Food factory.
• Semiconductor plant.
• Data center.
• Paint booth.
• Industrial oven.

2. Identify the Contaminant

Determine whether the target is:

• Coarse dust.
• Fine particles.
• PM10.
• PM2.5.
• PM1.
• Very fine particles.
• Odor.
• VOC.
• Specific gas.
• Paint overspray.

3. Determine the Required Efficiency

Potential filtration levels may include:

• ISO Coarse.
• ePM10.
• ePM2.5.
• ePM1.
• H13.
• H14.
• ULPA.

4. Confirm Airflow

Provide actual or design airflow in m³/h.

5. Confirm Available Pressure Drop

Check fan capability before increasing filter efficiency.

6. Determine the Number of Filtration Stages

Multi-stage filtration is often more practical than relying on a single final filter.

7. Review Environmental Conditions

Consider:

• Temperature.
• Humidity.
• Corrosion.
• Process chemicals.
• Outdoor pollution.

8. Confirm Filter Dimensions and Housing

Ensure filters fit correctly and prevent bypass.

9. Define Maintenance Strategy

Consider access, differential pressure monitoring and replacement frequency.

10. Evaluate Life-Cycle Cost

Compare total operating cost rather than purchase price alone.

Important Air Filtration Solution Design Parameters

Parameter	Information Required
Application	HVAC / Cleanroom / Industrial / Paint Booth
Contaminant	Dust / PM / HEPA-level particles / VOC / Gas / Overspray
Airflow	m³/h
Filter Efficiency	ISO Coarse / ePM10 / ePM2.5 / ePM1 / H13 / H14
Filter Stages	Pre / Fine / Final / Gas Phase
Initial Pressure Drop	Pa
Available Fan Static Pressure	Pa
Temperature	°C
Humidity	%RH where relevant
Filter Dimensions	W × H × D
Frame / Seal	GI / Aluminum / Plastic / Gasket / Gel
Quantity	Number of filters

Common Air Filtration Problems

High Pressure Drop

Possible causes include:

• Filters are too restrictive.
• Filters are overloaded.
• Insufficient media area.
• Incorrect filter selection.

Low Airflow

This can result from excessive filtration resistance or fan limitations.

Short Filter Service Life

Potential causes include:

• Insufficient pre-filtration.
• High dust loading.
• Excessive airflow.
• Undersized filter area.

Dust Downstream of Filters

Potential causes include:

• Air bypass.
• Damaged filter media.
• Incorrect filter class.
• Improper installation.

Odor Remains after Carbon Filtration

The carbon media may be saturated or chemically unsuitable for the target contaminant.

HEPA Filter Does Not Deliver Expected Cleanliness

Potential causes include:

• Seal leakage.
• Housing leakage.
• Filter damage.
• Incorrect airflow.
• Other contamination sources in the room.

How to Improve an Existing Air Filtration System

Potential improvement measures include:

• Add appropriate pre-filtration.
• Upgrade Fine Filters where fan capability permits.
• Improve filter-bank sealing.
• Use larger media-area filters.
• Install differential pressure monitoring.
• Add gas-phase filtration where required.
• Optimize filter replacement criteria.
• Reduce contamination at source.

Air Filtration Solutions and Life-Cycle Cost

The total cost of an air filtration solution may include:

• Filter purchase price.
• Fan energy.
• Average filter pressure drop.
• Service life.
• Replacement frequency.
• Maintenance labor.
• Waste disposal.
• Testing.
• Production downtime.
• Impact on equipment and product quality.

Air Filtration Solutions Supplier in Vietnam – VIETPHAT

VIETPHAT provides Air Filtration Solutions for HVAC, AHU, cleanroom, commercial and industrial applications throughout Vietnam.

We support customers with filtration selection based on:

• Application.
• Contaminant type.
• Filter efficiency.
• Airflow.
• Pressure drop.
• Operating conditions.
• Existing filter dimensions.
• Replacement requirements.
• Life-cycle cost.

VIETPHAT Air Filtration Product Range

• Pre Air Filters.
• Primary Air Filters.
• Panel Air Filters.
• Pleated Air Filters.
• Bag Air Filters.
• Pocket Air Filters.
• Fine Air Filters.
• Compact Air Filters.
• V-Bank Air Filters.
• Activated Carbon Air Filters.
• Carbon Air Filters.
• Molecular Air Filters.
• HEPA Air Filters.
• ULPA Air Filters.
• FFU Filters.
• Paint Booth Filters.
• High Temperature Air Filters.
• Replacement Air Filters.
• Disposable Air Filters.
• Air Filter Media.
• Custom Air Filters.

Industries Served by VIETPHAT

• Commercial buildings.
• Manufacturing plants.
• Hospitals.
• Pharmaceutical plants.
• Food factories.
• Electronics factories.
• Semiconductor plants.
• Data centers.
• Cleanrooms.
• Hotels.
• Shopping malls.
• Airports.
• Warehouses.
• Paint booths.
• Automotive plants.
• Industrial process facilities.

Information Required for an Air Filtration Solution Quotation

Required Information	Example
Application	AHU / Cleanroom / Factory / Paint Booth
Contaminant	Dust / PM2.5 / VOC / HEPA-level particles
Required Filter Efficiency	ePM1 / H13 / H14 / other
Airflow	m³/h
Available Pressure Drop	Pa
Filter Dimensions	W × H × D in mm
Existing Filter Type	Panel / Bag / V-Bank / HEPA
Operating Temperature	°C
Humidity	%RH if relevant
Existing Brand / Part Number	If available
Quantity	Number of filters

Frequently Asked Questions About Air Filtration Solutions

What Is an Air Filtration Solution?

An Air Filtration Solution is a combination of filter technologies and filtration stages selected according to the contaminant, airflow, system design and required air cleanliness.

What Types of Air Filters Are Used in HVAC Systems?

HVAC systems commonly use Pre, Panel, Pleated, Bag, Fine, Compact and V-Bank Filters, with Carbon or HEPA filtration added where required.

What Is Multi-Stage Air Filtration?

Multi-stage filtration uses several filters in sequence, such as a Pre Filter followed by a Fine Filter and, where necessary, a HEPA or gas-phase filter.

Why Is Pre-Filtration Important?

Pre-filtration removes larger dust particles and helps protect more expensive downstream Fine, Carbon and HEPA Filters.

Which Air Filter Is Best for PM2.5?

A suitable finished filter with tested ePM2.5 or ePM1 performance under ISO 16890 should be selected according to the required efficiency and HVAC system capability.

Which Air Filter Is Best for PM1?

Filters with suitable tested ePM1 performance can be used for PM1 control in general ventilation systems.

Is an ePM1 Filter the Same as a HEPA Filter?

No. ePM1 is a general ventilation classification under ISO 16890, while HEPA is a separate high-efficiency filtration category.

When Is HEPA Filtration Required?

HEPA filtration is typically used where high particulate cleanliness is required, such as selected cleanrooms, pharmaceutical facilities, hospitals and critical production environments.

Is H14 Always Better Than H13?

No. H14 has a higher filtration class, but the correct choice depends on application requirements, airflow, pressure drop and system design.

Can HEPA Filters Remove VOCs?

No. HEPA Filters primarily remove particles. VOCs and gases require suitable gas-phase filtration such as activated carbon or specialized molecular media.

Can Activated Carbon Remove All Odors?

No. Carbon performance depends on the specific contaminant, adsorbent type, media quantity, contact time, temperature and humidity.

What Is Molecular Filtration?

Molecular filtration uses adsorbent or chemisorbent media to control selected gaseous contaminants that particulate filters cannot remove.

What Air Filters Are Used in Cleanrooms?

Cleanrooms commonly use upstream Pre and Fine Filters followed by HEPA or ULPA Filters at terminal or FFU locations.

Does an H14 Filter Automatically Create a Cleanroom?

No. Cleanroom classification depends on the complete room and HVAC system, including airflow, room sealing, contamination sources and operating controls.

What Air Filters Are Used in Paint Booths?

Paint booths commonly use Intake Pre Filters, Ceiling Filters, Fiberglass Paint Arrestors, Floor Filters and Paper Paint Filters.

Can Standard HVAC Filters Capture Paint Overspray?

Ordinary HVAC filters are not generally suitable as primary paint arrestors. Spray booth exhaust requires media designed specifically for overspray loading.

What Air Filters Are Used at High Temperature?

High-temperature applications require filters with heat-resistant media, frames, sealants and gaskets rated for the actual operating temperature.

How Often Should Air Filters Be Replaced?

Replacement depends on pressure drop, contaminant loading, airflow, operating hours, filter condition and process requirements rather than one universal schedule.

Can Air Filters Be Washed?

Only filters specifically designed as washable should be cleaned. Most Fine, Bag, Compact, V-Bank, HEPA and ULPA Filters are normally replaced.

How Can Air Filtration Energy Cost Be Reduced?

Energy cost can be reduced by selecting suitable low-resistance filters, maintaining correct airflow, using adequate media area and replacing filters according to appropriate operating criteria.

Can VIETPHAT Design Custom Air Filtration Solutions?

VIETPHAT can support filter selection and customized filtration configurations according to application, dimensions, efficiency, airflow, pressure drop, media and operating conditions.

Can VIETPHAT Supply Replacement Filters for Existing Systems?

Yes. Replacement filters can be selected according to existing dimensions, filter class, rated airflow, pressure drop, frame, seal, brand and part number where available.

What Information Should I Provide for a Quotation?

Please provide application, target contaminant, required filtration efficiency, airflow, available pressure drop, filter dimensions, operating temperature, existing filter details and quantity.

Contact VIETPHAT for Air Filtration Solutions

For technical consultation, filter selection or quotation for Air Filtration Solutions for HVAC, AHU, cleanrooms and industrial systems, please contact VIETPHAT:

• Zalo / Hotline: 0971 344 344
• Sales: 0827 077 078
• Sales: 0829 077 078
• Email: sales@vietphat.com
• Website: www.vietphat.com