Heat flow from a hot region to a cold region is described and explained. Applications of this phenomenon (specifically heat pumps and refrigerators) are discussed. Excellent graphics.

An online JavaScript application which allows visitors to investigate the relative amount of heat being lost from their homes due to insufficient insulation. The current R-value and a hypothetical R-value can be entered and the energy...

Several well-written pages using easy-to-understand language. Explains about every detail concerning insulation and its installation or replacement. Discusses R values, heat loss, insulation types, etc.

The role of insulation in preventing heat loss is discussed. The concept of thermal resistance is introduced and explained. Understandable language but no graphics.

Using understandable words and exceptional graphics, this page describes the transfer of energy by means of conduction. Contains several links to related topics.

An explanation, supported by pictures and animation, of how thermal energy transfers between objects.

Lists thermal conductivity values for a variety of topics. The link "Heat conduction discussion" on this page displays an equation for calculating the rate of thermal conduction using these conductivity values.