The Bosch Tronic 3000T ES8 is a mini tank heater and is not tankless. The Bosch ES8 is used for point of use like under kitchen sink, bathroom sink, RV's etc.. The Bosch ES8 is not recommended for a shower as it is a mini tank and will go cold after a few minutes. Some people do use them in RV's for a shower but will only last for 4-5 minutes then hot water will run out.
The Bosch ES8 can be hooked up to the water plumbing lines 2 different ways. If the Bosch ES is hooked up with the water connection pipes coming out of the top of the unit vertical the unit will deliver around 7.0 gallons of hot water due to the way the piping inside the unit is.
Please call GlobalTowne at 888-726-9752 for further questions or to place an order.