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Mfg P/N 98807 Rev 8, Page 21
28. Optional Polytube Adapter - Options CD6, CD8, and CD11
(Blower Models only)
Figure 17 - Polytube Adapter
The polytube adapter option package does not include polytubing.
Polytubing can be obtained from a supply distributor such as FOF
Products, Inc., P. O. Box E, 1505 Racine Street, Delevan, WI
53115; ACME Engineering Co., P.O. Box 978, Muskogee, OK
74402; or any local greenhouse supply distributor. Some local
code authorities require the polytube material to be a listed mate-
rial. Consult code authority having jurisdiction and the polytube
supplier to determine the appropriate polytube material and rec-
ommended methods of suspension.
WARNINGS: This adapter is to be used
only on units equipped with a blower. At
no time should the free area in the polytube
be less than the listed minimum. Failure to
comply with these warnings could result
in severe personal injury, death and/or
property damage.
The following chart shows specification information covering the use of polytubes with these blower-type unit heaters.
Illustration shows Option
CD8, Polytube Adapter
for Floor-Mounted
Heater. Options CD6 and
CD11 are for Suspended
Heaters.
The polytube adapter option is designed to adapt this blower-
type heater for use with polytube ductwork. The use of
polytubes for air distribution is common in greenhouse appli-
cations and some industrial applications. A polytube distribu-
tion system delivers warm air to a specific area, reducing the
need for complete area heating. The polytube adapter is avail-
able in three installation designs making it adaptable to many
applications and building structures.
Conversion Table (Diameter to Area)
Diameter of the Hole Area of the Hole
(inches) (sq in)
2-1/2 4.91
2-1/4 3.98
2 3.14
1-7/8 2.76
1-1/2 1.76
1 0.785
CFM at Polytube Minimum Free
Suggested Hole Sizes and Locations
Size .25" Diameter Area (square
Length of Polytube
ESP (inches) Inches)
50 Ft 75 Ft 100 Ft 125 Ft 150 Ft
Number 37pairs 75 pairs 75 pairs
75 925 18 110
Diameter 1-1/2" 1" 1"
Spacing 16" 12" 16"
Number 50 pairs 50 pairs 100 pairs 94 pairs
100 1235 18 145
Diameter 1-1/2" 1-1/2" 1" 1"
Spacing 12" 18" 12" 16"
Number 40 pairs 60 pairs 60 pairs 125 pairs
125 1540 18 185
Diameter 1-7/8" 1-1/2" 1-1/2" 1"
Spacing 15" 15" 20" 12"
Number 40 pairs 60 pairs 60 pairs 125 pairs
130 1600 24 190
Diameter 1-7/8" 1-1/2" 1-1/2" 1"
Spacing 15" 15" 20" 12"
Number 50 pairs 50 pairs 75 pairs 75 pairs 75 pairs
165 2035 24 240
Diameter 1-7/8" 1-7/8" 1-1/2" 1-1/2" 1-1/2"
Spacing 12" 18" 16" 20" 24"
Number 42 pairs 42 pairs 60 pairs 60 pairs 100 pairs
200 2465 24 300
Diameter 2-1/4" 2-1/4" 1-7/8" 1-7/8" 1-1/2"
Spacing 14" 21" 20" 25" 18"
Number 40 pairs 60 pairs 60 pairs 60 pairs 60 pairs
250 3085 24 360
Diameter 2-1/2" 2" 2" 2" 2"
Spacing 15" 15" 20" 25" 30"
Number 75 pairs 75 pairs 75 pairs 75 pairs 75 pairs
300 3700 24 425
Diameter 2" 2" 2" 2" 2"
Spacing 9" 12" 16" 20" 24"
Number 60 pairs 60 pairs 60 pairs 100 pairs 100 pairs
400 4935 24 550
Diameter 2-1/2" 2-1/2" 2-1/2" 1-7/8" 1-7/8"
Spacing 10" 15" 20" 15" 18"
Holes