Convert Hour-degree Fahrenheit per BTU to Minute-degree Fahrenheit per BTU
Convert Hour-degree Fahrenheit per BTU (h·°F/BTU) to Minute-degree Fahrenheit per BTU (min·°F/BTU) instantly and accurately.
Conversion Formula
min·°F/BTU = h·°F/BTU × 60
About Hour-degree Fahrenheit per BTU
The h·°F/BTU equals (5/9 × 3600)/1055.05585262 K/W ≈ 1.8956 K/W. It is the traditional US unit for thermal resistance in HVAC, building science, and insulation engineering. A pipe fitting with R = 1 h·°F/BTU passes 1 BTU/h per °F driving difference. Appears in ASHRAE handbooks, ASTM C177, and older US plumbing codes. 1 h·°F/BTU ≈ 1.8956 K/W.
About Minute-degree Fahrenheit per BTU
The minute-degree Fahrenheit per BTU (min·°F/BTU) equals (5/9 × 60)/1055.05585262 K/W ≈ 0.03159 K/W. Used in US refrigeration and air-conditioning engineering where capacity is expressed in BTU/min - 1 ton of refrigeration equals 200 BTU/min. Thermal resistance of evaporator and condenser circuits is conveniently quoted in this unit. 1 min·°F/BTU ≈ 0.03159 K/W = 60 s·°F/BTU.
Quick Reference Table
| Hour-degree Fahrenheit per BTU (h·°F/BTU) | Minute-degree Fahrenheit per BTU (min·°F/BTU) |
|---|---|
| 1 h·°F/BTU | 60 min·°F/BTU |
| 2 h·°F/BTU | 120 min·°F/BTU |
| 5 h·°F/BTU | 300 min·°F/BTU |
| 10 h·°F/BTU | 600 min·°F/BTU |
| 25 h·°F/BTU | 1500 min·°F/BTU |
| 50 h·°F/BTU | 3000 min·°F/BTU |
| 100 h·°F/BTU | 6000 min·°F/BTU |