EGEE 102
Energy Conservation and Environmental Protection

Heating Degree Days Examples

PrintPrint

Example 1

Calculate the HDD for one day when the average outside temperature is 13º F.

Heating Degree Day = Tbase - Ta

= 65º F - 13º F

= 52º F

Calculate the HDD for one day when the average outside temperature is 2º C.

Convert from Celsius to Fahrenheit: 2º C = 35.6º F

Heating Degree Day = Tbase - Ta

= 65º F - 35.6º F

= 29.4º F

Example 2

Given the following data, calculate the HDD for the week:

Example 2: Average Temperature for a Week
Day Average Temperature
Sunday 49° F
Monday 47° F
Tuesday 51° F
Wednesday 60° F
Thursday 65° F
Friday 67° F
Saturday 58° F

Please watch the following (2:21) presentation about Heating Degree Days:

Heating Degree Days