These values equate to approximately 315–330 gallons of propane each year. The propane volume dial was less precise than the electrical digital readout, and propane readings were taken less frequently than electrical readings, which resulted in variability in reported propane use. Due to the use of propane to maintain hoophouse air temperatures, the energy loss from tank conduction decreases. Therefore, both the propane and electricity were indirectly and directly heating the water, respectively, and need to be considered as the total resources required for heating water.