BTU stands for British Thermal Units and is used to describe heat output. One BTU is enough heat to raise one pound of water by one degree. To determine how many BTU's you will need, you need to know the heat load that your system requires and the amount of water that you will need heated.
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Boilers such as Weil Mclain Boilers and Weil Mclain CGI Boilers can be found at www.supplyhouse.com
