BTU stands for British thermal unit. From the name it is easy to guess that this is a unit for measuring hit and temperature related consequences. On practical the definition is, the amount of hit that is required to increase the temperature of one pound of water to one degree Fahrenheit at the condition of one atmosphere – this is called BTU. Let me clear it with a laboratory example. Check for a conditioned laboratory. That has one atmosphere pressure on air. Take an empty beaker. Make sure this is large enough. Put one pound of water there. Place the beaker on Bunsen gas burner. Now before heating measure the temperature of water by thermometer. Suppose it is 60 degree Fahrenheit. Now start heating and keep measuring the temperature. After the temperature of water gets to 61 degree Fahrenheit, then stop heating. Now, theoretically One BTU heat energy has passed from the flame to the beaker. Now a day, even in Great Britain this unit is hardly used. People hardly know what is BTU?

This unit is non metric unit and avoided in international topics. But still there are some sectors that use BTU. So you should know, what is BTU? BTU is used to make people understand the power of heater. It is also used to make us understand the cooling power on a reverse basis. They generally produce thousands of BTU energy. Measuring only one BTU heat energy in actually pointless. MMBTU is a unit that indicates million of BTUs. But producing this much thermal energy is very tough and not well practiced. But in laboratory work it is a must need to check every point of loss or gain on energy. You will be needed very high tech equipments to measure this. Knowing about BTU can help you in many ways. Suppose in market you are getting two different products on same price. They are thermal energy products. Then you can check the BTU and compare to get suitable performance.