Filter Manufacturer & Supplier in India | HEPA Filters

HEPA filter

HEPA stands for High-Efficiency Particulate Air. A true HEPA filter captures 99.97% of particles at 0.3 microns — that includes PM2.5, bacteria, mould spores, and dust mites.

HEPA filters are graded under the EN 1822 standard:

H13 is the minimum for cleanroom and hospital use. H14 is required for operation theatres and pharmaceutical manufacturing.

A filter manufacturer & supplier in India producing HEPA filters should provide scan test certificates for every unit — not just a grade claim on a label. Without a certificate, the grade is unverified.

Where HEPA filters are used: homes in high-pollution cities, hospitals, ICUs, pharma cleanrooms, HVAC systems in commercial buildings.

Replacement interval: 12 to 18 months under normal use. In Delhi or Kanpur, 8 to 12 months.

Bag filter

Bag filters use woven fabric bags to capture dust from industrial air streams. Air enters the housing, passes through the bags, and dust collects on the outer surface. Bags are periodically cleaned — by pulse jet, shaker, or reverse air — and the cycle continues.

A single bag filter unit can handle 5,000 to 500,000 m³/hr of air depending on size.

Bag materials: polyester felt (general dust), polypropylene (chemical resistance), PTFE membrane (fine dust, high moisture), aramid (high temperature).

Where bag filters are used: cement plants, steel mills, textile factories, food processing, chemical plants, power stations.

Indian bag filter manufacturers supply complete systems: housing, bags, cleaning mechanism, and controls. A reliable filter manufacturer & supplier in India will specify the bag material based on your dust type and temperature, not just sell a standard product.

Pre-filter

Pre-filters are the first stage in any multi-stage filtration system. They capture coarse particles — hair, lint, large dust — before the air reaches finer downstream filters.

Installing a pre-filter extends the life of HEPA and carbon filters by 3 to 5 times. In a dusty industrial environment, skipping the pre-filter means replacing expensive downstream filters every few months instead of every 12 to 18 months.

Types: panel filters (G2 to G4 grade), roll media filters, pocket filters.

Replacement: every 1 to 3 months. These are low-cost — change them on schedule.

Carbon filter

Activated carbon filters remove gases, odours, and chemical vapours through adsorption. The carbon surface has millions of micropores that trap molecules as air passes through.

Carbon filters don’t capture particles. They target VOCs (volatile organic compounds), formaldehyde, benzene, ammonia, hydrogen sulphide, tobacco smoke, and cooking odours.

Where carbon filters are used: commercial kitchens, laboratories, printing facilities, paint booths, air purifiers targeting chemical contamination.

Carbon weight matters: a filter with 8 kg of activated carbon lasts significantly longer than one with 2 kg. Ask your filter manufacturer & supplier in India for the carbon weight per unit, not just the filter size.

Replacement: every 6 to 12 months. Carbon saturation is invisible — replace on schedule regardless of appearance.

High temperature filter

Standard filter media degrades above 80°C. High temperature filters use ceramic fibre, woven fibreglass, or PTFE-coated media that hold structural integrity at extreme heat.

Operating ranges: 150°C to 500°C continuous, with some designs rated for higher peak temperatures.

Where high temperature filters are used: furnaces, kilns, boilers, incinerators, glass manufacturing, foundries, hot gas filtration in power plants.

The critical spec is continuous operating temperature, not just peak temperature. A filter rated at 200°C continuous might survive a 280°C spike for 30 minutes — but running it continuously above its rated temperature will fail the media.

Medical filter

Medical-grade filters meet microbiological standards that standard HEPA filters don’t. They’re tested for bacterial penetration, manufactured in controlled conditions, and certified for use in sterile environments.

Indian healthcare regulations under NABH specify minimum filtration standards for hospital air handling:

• General wards: minimum H11
• ICU and isolation rooms: H13
• Operation theatres: H14

Where medical filters are used: OTs, ICUs, isolation rooms, pharmaceutical manufacturing cleanrooms, blood banks, pathology labs.

A filter manufacturer & supplier in India supplying medical filters should carry NABH-relevant documentation and be able to specify the filter for your room’s air change rate and classification.

Room air purifier

Room air purifiers combine a pre-filter, HEPA layer, and activated carbon stage in a single housing. For residential use, they’re the most practical filtration option available.

What to check:

• CADR (Clean Air Delivery Rate) in m³/hr — match to room size
• HEPA grade — H13 minimum for Indian pollution levels
• Activated carbon weight — more is better for odour removal
• BEE star rating — affects electricity cost over 3 to 5 years of daily use

A 5-star BEE rated purifier costs more upfront but uses significantly less power than an unrated model running 8 hours a day.

Cabin filter

Cabin filters clean air entering a vehicle’s passenger compartment through the HVAC system. Most Indian cars ship with basic particulate filters. An upgrade to a HEPA-grade cabin filter makes a measurable difference in PM2.5 levels inside the cabin.

Replacement interval: every 15,000 to 20,000 km under normal conditions. In Delhi, Mumbai, or other high-pollution cities: every 10,000 km.

Signs the filter needs replacement: reduced AC airflow, musty smell from vents, increased dust on the dashboard, worsening allergy symptoms during drives.

Generator air filter

DG sets pull large volumes of air for combustion. Dust and fine particles entering the intake cause cylinder wear, piston ring damage, and shortened engine life.

Filter types for generators:

• Dry paper element: standard, low cost, easy to replace
• Oil bath filter: used in high-dust environments like construction sites
• Pre-cleaner: separates heavy dust before the main filter element

Maintenance: inspect every 50 to 100 running hours. Replace at manufacturer-specified intervals — typically every 250 to 500 hours depending on dust load.

Running a generator with a clogged or missing air filter costs far more in engine repairs than the filter itself.

Industrial air filter

Industrial air filters cover a broad range of equipment for factories, processing plants, and large commercial facilities. These handle higher airflow, heavier dust loads, and more demanding conditions than any residential product.

Categories:

• AHU panel filters: supply air to factory floors and offices
• Cartridge filters: dust collectors in woodworking, metal fabrication, food processing
• Mist eliminators: remove coolant mist in CNC machining operations
• Oil mist filters: clean compressor exhaust air

Critical spec: airflow rating in m³/hr. Undersizing causes excessive pressure drop, bypass leakage, and premature failure. Size the filter at 120 to 130% of your system’s actual airflow.