Water is being pumped from bottom of a well 15ft deep at the rate of 200gal/he into a vented storage tank to maintain a level of water in a tank 165ft above the ground. to prevent freezing in the winter a small heater put 3btu/hr into the water during its transfer from the well to the storage tank, assuming that the well water is at 35fahrenhiet? a 2-horsepower pump is being used to pump the water . about 55% of the rated horsepower goes into work of pumping and the rest is dissipated as heat to the atomsphere.