Other

Air filters and air purifying machinery for gases

BIS QCO APPLICABLE · ISI MARK SCHEME · IS 3315

HSN 8421 39 90 (air filters and air purifying machinery for gases) is covered by a Bureau of Indian Standards Quality Control Order. Conformity to IS 3315:2019 and IS 17570 (Part 1):2021 is mandatory under the ISI Mark Scheme by virtue of the Air Cooler and Air Filters (Quality Control) Order, 2025, with effect from 30 January 2025. No separate customs-clearance overlay applies beyond the BIS obligation.

What this is

HSN code

8421 39 90

Chapter

84 · Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof

BIS QCO

Applicable · ISI Mark Scheme · CM/L required

Indian Standard

IS 3315:2019 · effective 30-01-2025

Applicable Partner Government Agencies

BISBIS·Bureau of Indian Standards

Compliance steps

1
Source only from a Bureau of Indian Standards CM/L-licensed manufacturer holding a current licence against IS 3315:2019 or IS 17570 (Part 1):2021, as applicable to the product variant. Verify the CM/L number, licensed product scope, and manufacturing facility on the BIS online register before placing the purchase order.
Air Cooler and Air Filters (Quality Control) Order, 2025 · S.O. 529(E) dated 30-01-2025
2
Ensure every unit bears the ISI mark and the supplier's CM/L number under Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018. Marking must appear on the product itself, not on packaging alone.
Scheme-I of Schedule-II to the BIS (Conformity Assessment) Regulations, 2018 · Air Cooler and Air Filters (Quality Control) Order, 2025
3
Confirm the applicable staggered implementation date for the supplier's enterprise category: general enterprises from 01-04-2025, Small Enterprises from 01-07-2025, and Micro Enterprises from 01-10-2025. Consignments shipped before the relevant category date must be supported by proof of pre-commencement declared stock where applicable.
Air Cooler and Air Filters (Quality Control) Order, 2025 · S.O. 529(E) dated 30-01-2025
4
If importing up to 200 units per year solely for research and development, document the R&D purpose, confirm the importer is a manufacturer of air coolers or air filters, and maintain a year-wise record. Such goods must not be sold commercially and must be disposed of as scrap.
Air Cooler and Air Filters (Quality Control) Order, 2025 · S.O. 529(E) dated 30-01-2025
5
Quote the supplier's BIS CM/L number on the bill of entry and ensure compliance with S.O. 776(E). Customs verifies the CM/L in real time against the BIS register; an absent, expired, or scope-mismatched licence triggers consignment detention.
S.O. 776(E) dated 12-02-2026 · BIS Act, 2016 · Customs Act, 1962

A word of counsel

The single most common error on this tariff line is assuming the Micro or Small Enterprise staggered deadline applies to the importer's own enterprise classification rather than to the foreign manufacturer's. The QCO phased dates govern when the goods must conform at the point of import; a Micro Enterprise importer sourcing from a general-category foreign manufacturer faces the 01-04-2025 deadline, not 01-10-2025. Verify the manufacturer's enterprise category independently and do not conflate it with the Indian buyer's MSME status.

Need a regulatory steer on this product?

Speak to a regulatory counsel about your specific HSN, IS, and supplier situation.

Speak to an Expert

Frequently asked

Does HSN 8421 39 90 require BIS certification?

Yes. Air filters and air purifying machinery under this tariff line require conformity to IS 3315:2019 or IS 17570 (Part 1):2021 under the ISI Mark Scheme, with effect from 30 January 2025, by virtue of the Air Cooler and Air Filters (Quality Control) Order, 2025.

Do staggered implementation dates affect when a consignment must bear the ISI mark?

Yes. The mandatory date is 01-04-2025 for general enterprises, 01-07-2025 for Small Enterprises, and 01-10-2025 for Micro Enterprises, based on the manufacturer's classification. Consignments arriving after the applicable date without a valid CM/L are liable to detention.

Is there an exemption for Micro Enterprises with turnover below five crore rupees?

Yes. Enterprises registered on the Udyam Portal with plant and machinery investment not exceeding one crore rupees and turnover not exceeding five crore rupees for the previous financial year, as certified by a Chartered Accountant, are exempt from the Order.

Does a single CM/L licence cover all air filter variants from one manufacturer?

No. The CM/L is scope-specific by product type, specification, and manufacturing facility; variants or plants outside the licensed scope are not covered, and customs will detain a consignment on a scope mismatch.

Last verified against gazette notifications: 2026-05-18. Source: BIS / Indian Customs CUSDATA.