Question-and-Answer Resource for the Building Energy Modeling Community
 | 1 | initial version |
R is for Rankine. "hr-ft2-F/Btu" and "hr-ft2-R/Btu" can be used interchangeably.
The Rankine scale is the same as Fahrenheit, except it's based on absolute zero. R = F + 459.7 So 50 F = 509.7 R 70 F = 529.7 R The difference between these two temperatures is 20 F or 20 R. So for any metric based on temperature difference, F and R are interchangable. The same is true for Kelvin and Centigrade.
| | 2 | No.2 Revision |
R is for Rankine. "hr-ft2-F/Btu" and "hr-ft2-R/Btu" can be used interchangeably.
The Rankine scale is the same as Fahrenheit, except it's based on absolute zero.
zero.
R = F + 459.7 So 50 F = 509.7 R 70 F = 529.7 R
The difference between these two temperatures is 20 F or 20 R. So for any metric based on temperature difference, F and R are interchangable. The same is true for Kelvin and Centigrade.
