Voluntary BIS Standards
ISI Mark for Ventilation Ducting - Vinyl Coated, Flexible and Semi-Rigid – IS 3768
BIS ISI mark (Scheme-I)
IS 3768
- Minimum marking fee per year
- ₹15,800 – ₹79,000
- Micro to large firms
- HSN code
- 39172990
- Check the code with customs
There is no Quality Control Order (QCO) for Ventilation Ducting - Vinyl Coated, Flexible and Semi-Rigid today. This means the ISI mark for IS 3768 is optional. Many makers still get it, because government tenders, large buyers and online marketplaces often ask for it.
How it works: a BIS-approved lab tests your samples against IS 3768. A BIS officer then visits your factory. If everything is in order, BIS gives you a licence. You can then print the ISI mark with your licence number (CM/L number). Factories outside India apply under the Foreign Manufacturers Certification Scheme (FMCS). They must also name a representative in India, called an Authorised Indian Representative (AIR).
Every year you pay BIS a minimum marking fee. It is ₹15,800 for micro firms and ₹79,000 for large firms. The fee also depends on how much you make: ₹3.17 per metre. You pay whichever amount is higher. These prices are a guide only and do not include GST.
Indian Standard covered
| IS number | Product |
|---|---|
| IS 3768 | Ventilation Ducting - Vinyl Coated, Flexible and Semi-Rigid |
Minimum marking fee by firm size
You pay BIS a minimum marking fee every year. Micro, small and medium firms (with Udyam registration) pay less. BIS also works out a fee from the unit rate and your production. You pay whichever amount is higher.
- Large firms
- ₹79,000
- Medium firms
- ₹63,200
- Small firms
- ₹39,500
- Micro firms
- ₹15,800
Unit rate: ₹3.17 per metre
- Other BIS charges
- ₹9,000 for every ISI mark product: application charge ₹1,000 · licence fee ₹1,000 · audit charges ₹7,000
- Foreign manufacturers
- Get a detailed quote
- Our consulting fee
- Best-value quote – let’s talk
All prices are a guide only and do not include GST. Rules and dates can change, so check the latest notice before you apply. Ask us for an up-to-date quote.
Common questions
Is BIS certification mandatory for Ventilation Ducting - Vinyl Coated, Flexible and Semi-Rigid?
No. There is no Quality Control Order for it today, so the ISI mark is optional. It can still help you win tenders and gain the trust of buyers.
What is the BIS marking fee for Ventilation Ducting - Vinyl Coated, Flexible and Semi-Rigid?
The minimum fee each year is ₹79,000 for large firms, ₹63,200 for medium firms, ₹39,500 for small firms and ₹15,800 for micro firms. Your firm size comes from your Udyam registration. BIS also works out a fee at ₹3.17 per metre. You pay the higher amount. GST is extra. These figures are a guide, based on the BIS fee list.
How much does testing for IS 3768 cost?
The price depends on the lab, the number of models and the tests needed. Send us your product details and we will get quotes from BIS-approved labs.
What is the HSN code for Ventilation Ducting - Vinyl Coated, Flexible and Semi-Rigid?
It usually comes under HSN 39172990. Check the code on your bill of entry, because customs decides the code for the exact product.
Can a foreign manufacturer get the ISI mark?
Yes. Factories outside India apply under the Foreign Manufacturers Certification Scheme (FMCS). They must also name a representative in India, called an Authorised Indian Representative (AIR). The licence is in the name of the factory. Once the product is mandatory, importers cannot clear the goods at customs without it.
How long does BIS certification take?
Factories in India usually get a licence 30 to 60 days after a good test report. Factories outside India (FMCS) should plan for four to six months, including the factory visit.
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