Outdoor Unit Pipe Work
Freeze protection
Freeze protection solutions must use propylene glycol with a toxicity rating of Class 1
Percent Propylene Glycol [wt. %]
0
10
20
30
36
40
43
48
24
Freezing Points of Propylene Glycol - Water Mixtures
Freezing Point [ °F ]
32
26
20
10
0
-5
-10
-20
Freezing Point [ °C ]
0
-3
-7
-12
-18
-20
-23
-29