Bis Certification For Evaporative Air Coolers (Desert Coolers) In summer, the air from the cooler provides a refreshing coolness, making us feel comfortable. Evaporative air coolers, also known as desert coolers, are highly effective in hot and dry climates. From a safety perspective, BIS, the standard-making body of the Government of India, has established the standard IS 3315:2019 for these coolers. Manufacturers must obtain BIS certification under this standard to sell their evaporative air coolers. Selling evaporative air coolers without the ISI mark or BIS certification is a punishable offense.