Radiant Cooling (and Heating) Calculators (cont’d)
Find The Best Temperature Offset For Maximum Capacity
2.
The next input of the Radiant calculator is the temperature. Note
this is not the water temperature, rather it refers to the
temperature of the radiant surface which we will get to in a
moment.
3.
The next input is the area, please leave this as-is at 1 M^2 (the
output will be converted for BTU per Ft.^2 automatically later on)
4.
In the next section, you can also input the average emissivity for a
collection of normal things found in a room – wood, stone, plastic,
fabrics, painted surfaces, etc. This can be left at the default value of
.91 unless you have reason to change it.
5.
And in this section, you can input the average temperate of these
“things” in the conditioned space. Generally for a radiant heating
calculation you would use 65-68F. For cooling, we suggest 76-78F.
Note that when using radiant, many users find that an indoor
winter air temperature of around 64-65F is quite comfortable, due
to the nature of radiant heating. Likewise with radiant cooling, user
are often comfortable at 80F and report that it feels more like 75F.
6.
At the bottom, you will find the net output.
So how to define the radiant panel temperature? It will not be the
same as the operating water temperature. Go to the Surface Temp
tab.
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