The conversation between human and AI assistant.
Which is the best RO water purifier in Patna?
That sounds good. But before making the final decision, can you tell me about the maintenance cost and service of these purifiers?
Kent has a decent after-sales service record, and the average cost of maintenance is around 3000 to 4000 INR per annum. On the other hand, Havells also provides well-serviced experience, and the maintenance cost is around 5000 INR per annum.