Finned type heat exchangers are important equipment used in room air conditioners whose performance affects the cooling efficiency, heat transfer rate and HVAC systems in general. These devices are widely used in both domestic and commercial air conditioning systems to provide adequate thermal transfer from the refrigerant to the air. Given that these devices work in conditions of constant variation in terms of temperature and pressure, it is vital that manufacturers follow the standard set out in IS 11329:2018 concerning finned type heat exchangers used in room air conditioners.
The main technical aspects specified by the Indian Standard include fin geometry, tube material, brazing, leakage tightness, dimensional parameters, corrosion resistance, and mechanical strength. Conformity to BIS QCO and IS 11329:2018 certification is compulsory for sale on the Indian market. The ISI mark on finned heat exchangers means that the devices meet certain standards of reliability, safety, and performance.
IS 11329:2018 is the Indian Standard which describes the requirements of heat exchangers of finned type in room air-conditioners. This standard guarantees that such components provide effective heat transfer capabilities while ensuring their structural strength through thermal cycles. According to the Indian Standard, finned heat exchangers must be:
It is compulsory for the manufacturers/importers/suppliers who manufacture/furnish/offer finned type heat exchangers in room air conditioners to get BIS Certification as per IS 11329:2018. This would help ensure safe and standardized functioning of the products.
Applicable to:
BIS ISI certification of finned heat exchangers according to IS 11329:2018 ensures that these heat exchangers fulfill all important aspects of their performance needed in air conditioners.
In order to ensure the dependable working of finned type heat exchangers in room air conditioners, the Bureau of Indian Standards has set certain basic requirements in the standards laid down under IS 11329:2018. The standard assures the reliability of finned type heat exchangers as these will work stably with consistent performance and will give cool output under any kind of continuous thermal cycling, humidity and HVAC operation conditions.
The BIS test parameters for finned type heat exchangers in room air conditioners are as follows:
The BIS certification procedure checks the compliance of finned type heat exchanger used for room air conditioning in accordance with IS 11329:2018 standard before their marketing in India. The procedure is regulated by the Bureau of Indian Standards and involves the following steps:
Foreign manufacturers need to appoint an Authorized Indian Representative (AIR) in India. This person is the local point of contact for the Bureau of Indian Standards (BIS) and takes care of all rules and compliance work in India.
If a manufacturer is already certified by BIS, the ISI Mark for finned type heat exchangers for room air conditioners based on IS 11329:2018 should be permanently marked on the heat exchanger, its unit assembly, or the packing, wherever applicable. In addition to the ISI mark, other information including identification of the manufacturer, brand name, and the CM/L number is also necessary. These are to ensure that the heat exchanger meets all safety requirements prescribed by the Bureau of Indian Standards. The following points are mentioned -
Note: Marking is typically applied using durable stamping, tagging, or permanent printing to ensure clear identification during handling, storage, and transportation, as per BIS marking requirements.
The total cost involved in BIS certification for finned heat exchangers includes application costs, inspection costs, testing costs and marking costs. The overall cost is dependent on the level and place of production.
Note -
Non-conformity with IS 11329:2018 regarding finned-type heat exchangers for room air conditioners could result in significant ramifications for the manufacturers. There are strict controls applied by the Bureau of Indian Standards (BIS) in order to make sure only those products which have been certified are being supplied in the Indian market. In case there is any deviation from the set standards or any other kind of abuse of the ISI mark or even quality control issue, there would be severe ramifications against such a violation.
The finned type heat exchangers used in room air conditioners are an important part of the system that guarantees effective cooling, heat transfer and overall performance of HVAC systems. They are created to provide optimum thermal exchange of refrigerant with air, working under continuous pressure, temperature changes and extended periods of operation. The main reason for applying such heat exchangers is to gain energy efficiency, durability and effective cooling capacity of the air conditioner. IS 11329:2018 certification provides assurance that all the products meet the strict requirements regarding the quality of materials, dimensions, thermal capacity and corrosion resistance. BIS Certification of Finned Type Heat Exchanger for room air conditioner (IS 11329:2018) provides proof of product conformity and the use of ISI Mark, meaning safety and reliability of the product. The manufacturers can consult a BIS Consultant for finned type heat exchangers certification. With EVTL India, the process gets easier.