BTU, or British thermal unit, is the industry-standard used to measure the heating efficiency of furnaces. In addition to BTU ratings, furnace manufacturers might include a Manual J Load rating and a percentage of energy efficiency.
A debenture is a type of debt instrument that is not secured by physical assets or collateral. Debentures are backed only by the general creditworthiness and reputation of the issuer. Both corporations and governments frequently issue this type of bond to secure capital.
The difference between stocks and bonds is that stocks are shares in the ownership of a business, while bonds are a form of debt that the issuing entity promises to repay at some point in the future. A balance between the two types of funding must be achieved to ensure a proper capital structure for a business.