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Easily calculate sensible heat ratio with our simple sensible heat ratio calculator. Learn what SHR is, how it works, and how to use the formula in real life.
Cooling systems do more than cool air. They also remove moisture. The sensible heat ratio (SHR) tells you how much of the cooling work goes into changing air temperature and how much goes into removing humidity.
We built a simple sensible heat ratio calculator to help you get this number in seconds. You don’t need deep HVAC knowledge. You don’t need complex charts. You just enter your values, hit calculate, and you’ll get clean results.
This guide breaks it all down with easy words and short lines. You’ll learn what SHR means, how it works, and why it matters.
The sensible heat ratio shows the share of cooling that lowers air temperature instead of removing moisture.
The formula is simple:
SHR = qs / qt
If SHR = 1, all cooling changes air temperature.
If SHR = 0.8, eighty percent cools the air and twenty percent removes moisture.
In real systems, SHR is always between 0 and 1.
You only need two values:
qs = sensible heat
qt = total heat
Now use the formula:
SHR = qs / qt
Example:
qs = 100 kW
qt = 125 kW
SHR = 100 / 125
SHR = 0.80 or 80%
That’s it. You can do it by hand, or you can let our calculator handle the math for you.
The calculator follows these simple steps:
The tool also checks for errors. It warns you if you use negative numbers, wrong inputs, or if sensible heat is greater than total heat.
The goal is simple: clean results every time.
It’s very easy. You enter your numbers. You pick the right unit. You click the button. The calculator shows the SHR, the latent heat, and the full ratio.
This helps you size HVAC systems. It helps you check cooling loads. It helps you understand how much moisture the system removes.
Most comfort cooling systems run between 0.70 and 0.90.
A low SHR means the space needs more moisture removal.
A high SHR means the space needs more dry cooling.
On a psychrometric chart, the SHR line shows the change in air conditions. The slope is tied to the SHR value. A higher SHR creates a flatter line because more cooling targets temperature and less targets moisture.
In simple words:
Higher SHR = flatter line.
Lower SHR = steeper line.
The sensible heat ratio tells a clear story. It shows how much cooling goes into temperature change and how much goes into moisture removal. Our sensible heat ratio calculator makes the math fast and smooth.
If you work with HVAC loads, this tool will save time. If you’re learning the basics, it gives you clear results. It’s simple. It’s quick. It works.
It’s the part of cooling used to lower air temperature. The formula is SHR = qs / qt.
Divide sensible heat by total heat. Example: SHR = 100 / 125 = 0.8.
Most systems fall between 0.70 and 0.90.
It’s the line direction on a psychrometric chart. High SHR gives a flatter slope.
No. SHR always stays between 0 and 1.