The Both Bio Bidet’s BB-2000 and BB-1700 offers warm water from the very start of the wash till the very end. This is due to the hybrid water heater they use. The small hot water tank (that’s built into the seat) allows for instant hot water, and the instant water heater allows for unlimited warm water. It’s important to note that most bidet seats that offer hybrid water heaters do not offer unlimited warm water as instant water heater used is not powerful enough to keep up with the wash. This makes the Bliss heater pretty unique