Antifreeze correction, Nskw installation manual – WaterFurnace Envision Hydronic User Manual
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NSKW INSTALLATION MANUAL
Catalog performance can be corrected for antifreeze use. Please use the following table and note the example given.
Antifreeze Correction
Antifreeze Type
Antifreeze %
by wt
Heating
Cooling
Pressure
Drop
Load
Source
Load
Source
EWT - °C
26.7
-1.1
10.0
32.2
-1.1
Water
0
1.000
1.000
1.000
1.000
1.000
Ethylene Glycol
10
0.990
0.973
0.976
0.991
1.075
20
0.978
0.943
0.947
0.979
1.163
30
0.964
0.917
0.921
0.965
1.225
40
0.953
0.890
0.897
0.955
1.324
50
0.942
0.865
0.872
0.943
1.419
Propylene Glycol
10
0.981
0.958
0.959
0.981
1.130
20
0.967
0.913
0.921
0.969
1.270
30
0.946
0.854
0.869
0.950
1.433
40
0.932
0.813
0.834
0.937
1.614
50
0.915
0.770
0.796
0.922
1.816
Ethanol
10
0.986
0.927
0.945
0.991
1.242
20
0.967
0.887
0.906
0.972
1.343
30
0.944
0.856
0.869
0.947
1.383
40
0.926
0.815
0.830
0.930
1.523
50
0.907
0.779
0.795
0.911
1.639
Methanol
10
0.985
0.957
0.962
0.986
1.127
20
0.969
0.924
0.929
0.970
1.197
30
0.950
0.895
0.897
0.951
1.235
40
0.935
0.863
0.866
0.936
1.323
50
0.919
0.833
0.836
0.920
1.399
WARNING: Gray area represents antifreeze concentrations greater than 35% by weight and should
be avoided due to the extreme performance penalty they represent.