# How to Calculate Indoors Feels Like Temperature for All Seasons?

I want to calculate "feels like" temperature indoors, with no sunlight or wind. But I don't know which method to use or if I should combine methods. Below I've given some research results I obtained but the correct method can be something else.

• Heat Index Calculation looks promising but I know it is mostly used for high temperatures. At least there are adjustments for low temperatures as well.

• There is also "apparent temperature" calculation given as:

AT = Ta + .348e - .70ws + .70*(Q/ws + 10) - 4.25

• Where AT is the apparent temperature (C)
• Ta is the dry bulb temperature (C)
• e is the humidity (hPa)
• ws is the wind speed (m/s)
• Q is the net radiation absorbed per unit of body surface area

I can substitude zero for ws but even then I don't know Q value thus I am not sure if I can use this.

• There is WetBulb Globe Temperature (WBGT) but it is for outdoor (i guess) because it involves sunlight.
• For indoor use, you need to consider the radiative temperature of the walls, floor, and ceiling. Outdoor equations (that aren't very scientific to begin with) are not suitable. A 21°C room can feel surprisingly cold when the walls are at 13°C. I'm not an expert at all, but for pointers, see operative temperature and mean radiant temperature on Wikipedia.
– gerrit
Commented Mar 14 at 12:24