AIWH-3LSOLNEO(3KW) is a ISI marked product with 5 star performance and best possible quality. It comes fitted with a ultra-thick stainless steel of superior 304 grade that has long life and is rust free and longer warranties. Why people prefer the Crompton water heater. It is because of advanced technology of anti siphon protection: The anti siphon system prevents the back flow of water from the tank, providing protection to heating element from dry heating. Get the best quality that ensures, you have a water heater that works flawlessly in Indian water conditions. Longer warranties: 2 years comprehensive on the product. Made better: Made in India's most modern and advanced instant water heater.