British thermal unit. A way of measuring heat energy. Or if you want to get technical: the quantity of heat required to raise the temperature of 1 pound of water by 1 degree F.
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Call us TOLL FREE: 1-866-Warm-Toes! (1-866-927-6863)
British thermal unit. A way of measuring heat energy. Or if you want to get technical: the quantity of heat required to raise the temperature of 1 pound of water by 1 degree F.