Titan TAG2 Heat Pump 65K BTU. Titan 65K BTU Heat Pump are designed with simplicity in mind. Our digital controller allows you to change any settings with ease. Designed to perform two heat exchanges to continuously keep you pool / spa at the desired temperature while saving you money! Just as an air conditioner collects heat from the interior of the home and rejects that heat to the outside, our system collects heat from the outside air and rejects it into the pool.