Heat output in a home is measured in which unit?

Heat output in a home is measured in BTUs, which stands for British Thermal Units. This measurement quantifies the amount of heat required to raise the temperature of one pound of water by one degree Fahrenheit. In the context of heating systems and home energy efficiency, understanding BTUs is essential because it helps determine how much heating energy is needed to warm a space effectively.

R-values, on the other hand, are used to measure thermal resistance, indicating how well an insulation material resists heat flow, rather than the output of heat itself. Degrees Fahrenheit and degrees Celsius are units of temperature measurement, not units that quantify heat output. Therefore, BTUs is the most appropriate and relevant unit for measuring heat output in residential heating systems.