Cut Sheet

3
WinterGard Selection Guide
Selection Tables
Use one of the tables below to help select the
correct WinterGard heating cable for your
application. (Consult the Commercial and
Residential Application and Design Guide or
H900/H908 Installation Instructions for com-
plete system design information.)
Use Table 1 to select heating cables for
insulated metal pipes. Use Table 2 for
insulated plastic pipes.
Read across the table to find your pipe diameter,
then drop down to the line corresponding to the
lowest air temperature for that application and
the correct insulation thickness. The cell at that
intersection has a particular shade and may
have a number.
The shade indicates which heating cable to use
(key to the shades appears to the left of Table 1).
A number in the cell represents the spiraling ratio
(feet of heating cable per foot of pipe). If no num-
ber appears in the cell, straight trace the pipe. If
a number does appear in the cell, spiral trace
the pipe. If your spiraling ratio is 2.0,
multiple-trace the pipe using two straight traces
at the 4 o’clock and 8 o’clock positions.
If your spiraling ratio is 3.0, multiple-trace the
pipe using three straight traces at the 11 o’clock
or 1 o’clock position and at the 4 o’clock and 8
o’clock positions.
1.3
Insulation
thickness
Lowest
air temp.
0°F
–20°F
–40°F
Pipe diameter (inches)
0.5 in
1.0 in
1.5 in
0.5 in
1.0 in
1.5 in
2.0 in
0.5 in
1.0 in
1.5 in
0.50 0.75 1.00 1.25 1.50 2.00 2.50 3.00
4.00
6.00
2.0 in
1.8
1.1 1.3 1.5
1.1 1.5
1.1
1.9
1.4
1.1
1.8
1.1 1.2
1.1 1.4
1.4 1.7 2.0 3.0
3.0
Insulation
thickness
Lowest
air temp.
0°F
–20°F
–40°F
Pipe diameter (inches)
0.5 in
1.0 in
1.5 in
0.5 in
1.0 in
1.5 in
2.0 in
0.5 in
1.0 in
1.5 in
0.50 0.75 1.00 1.25
1.50
2.00 2.50 3.00 4.00
6.00
2.0 in
2.0
1.7 3.0
1.2 1.6
1.2
1.1 1.3 1.5
1.4 1.8
1.1 1.3
3.0
1.7
1.4
3.0
1.8
1.8
1.1 1.2
1.11.1 1.5
1.9 3.0
1.8 2.0
1.2 1.4
3.0 3.0
1.1 1.2 1.4 1.6
1.4 1.7
1.1 1.3
1.1 1.2
2.0 3.0
Example 1
Pipe = 2-inch-diameter metal
Lowest air temperature = 0°F
Insulation thickness = 1 inch
Cable length and type = 1 foot of WinterGard
H311 per foot of pipe
Example 2
Pipe = 2.5-inch-diameter plastic
Lowest air temperature = –20°F
Insulation thickness = 1 inch
Cable length and type = 1.2 feet of WinterGard
Plus H611 or H612 or WinterGard Wet H621
or H622 per foot of pipe
H311
H611, H612, H621, H622
Increase insulation thickness.
Key to Tables 1 and 2
Table 1. For metal pipes with fiberglass insulation or equivalent (based on 40°F maintain)
Table 2. For plastic pipes with fiberglass insulation or equivalent (based on 40°F maintain)