Abstract: The present invention is a system for tank recovery comprising a tankless having an outlet and a storage tank that is operatively connected to the tankless. A pump is operatively connected to the tankless and the pump is operatively connected to the storage tank. A first thermistor is in thermal communication with the outlet of the tankless. The first thermistor measures a first temperature of the outlet of the tankless when the pump is active. A second thermistor is in thermal communication with the storage tank. The second thermistor measures a second temperature of the storage tank. A controller has a stored default temperature for the tankless. The controller receives the measured second temperature from the second thermistor. The controller compares the stored default temperature for the tankless to the measured second temperature from the second thermistor.

Abstract: A water heating system including a water container having a cold water inlet that connects to a water supply, a hot water outlet, a water heater outlet and a water heater inlet; an instantaneous water heater mounted to the water container and having a tank supply inlet connected to the water heater outlet, a tank supply outlet connected to the water heater inlet, a burner, and a heat exchanger located adjacent the burner between the tank supply inlet and the tank supply outlet; a pump connected between the water container and the instantaneous water heater that moves water between the water container and the instantaneous water heater; and a controller that operates the pump and the burner.

Abstract: A water heating system including a water container having a cold water inlet that connects to a water supply, a hot water outlet, a water heater outlet and a water heater inlet; an instantaneous water heater mounted to the water container and having a tank supply inlet connected to the water heater outlet, a tank supply outlet connected to the water heater inlet, a burner, and a heat exchanger located adjacent the burner between the tank supply inlet and the tank supply outlet; a pump connected between the water container and the instantaneous water heater that moves water between the water container and the instantaneous water heater; and a controller that operates the pump and the burner.