Brochure
© 2013 U.S. Boiler Company, Inc. - Lancaster, PA
Phone: 1-888-432-8887
USBL13025 10ms
www.usboiler.net
Slenderized Radiators
Information, Specifications, & Dimensions
Center leg section furnished on 30 section and better
* Heating surface based upon the standard heat emission of
240 BTU per square foot per hour.
Add 1/2” for each bushing.
Furnished in even number section up to 48 sections.
Maximum allowable working pressure - 50 PSI, water; 15 PSI steam. Consult factory for higher pressure.
Water content - 19-4:0.08 Gal./section;25-4:0.12 Gal./section; 26-6:0.17 Gal./section
Size
No. of
Sections
Length
1-3/4” per
Sections
(inches)
Square Feet - EDR*
4-Tube 6-Tube
19” High 25” High 25” High
4
6
8
10
12
14
16
18
20
22
24
26
28
30
32
34
36
38
40
42
44
46
48
7”
10-1/2”
14”
17-1/2”
21”
24-1/2”
28”
31-1/2”
35”
38-1/2”
42”
45-1/2”
49”
52-1/2”
56”
59-1/2”
63”
66-1/2”
70”
73-1/2”
77”
80-1/2”
84”
6.4
9.6
12.8
16.0
19.2
22.4
25.6
28.8
32.0
35.2
38.4
41.6
44.8
48.0
51.2
54.4
57.6
60.8
64.0
67.2
70.4
73.6
76.8
8
12
16
20
24
28
32
36
40
44
48
52
56
60
64
68
72
76
80
84
88
92
96
12
18
24
30
36
42
48
54
60
66
72
78
84
90
96
102
108
114
120
126
132
138
144
Size H I J K L M N O
25-6
25-4
19-4
23-13/16”
23-13/16”
17-13/16”
6-15/16”
4-7/16”
4-7/16”
1-1/16”
1-1/16”
1-1/16”
1”
1”
1”
1/8”
1/8”
1/8”
21-7/16”
21-7/16”
15-7/16”
1-1/4”
1-1/4”
1-1/4”
2-1/2”
2-1/2”
2-1/2”
NPT NPT NPT
SLENDERIZED RADIATOR DIMENSIONS
Slenderized Radiators
provide heat in a low profile
package. Lower and slimmer
than most conventional
radiators, they feature a
rugged and reliable cast
iron sectional design
which easily enables the
installation of multiple units.
Obsolete sizes – All Types
Burnham Radiant Radiators
Federal - Old Style Column Radiation
Fero - 2-1/2” center
RATING - Square Feet Per Section
Height
1 Col.
2-1/2”
ctr.
2 Col.
2-1/2”
ctr.
3 Col.
2-1/2”
ctr.
4 Col.
3”
ctr.
5 Col.
3”
ctr.
14”
17”
18”
20”
22”
23”
26”
32”
38”
44”
45”
—
—
—
1.50
—
1.67
2.00
2.50
3.00
—
—
—
—
—
2.00
—
2.33
2.67
3.33
4.00
—
5.00
—
—
2.25
—
3.00
—
3.75
4.50
5.00
—
6.00
—
—
3.00
—
4.00
—
5.00
6.50
8.00
10.00
—
4.00
4.00
5.00
5.00
6.00
—
—
—
—
—
—
Height
RATING - Square Feet Per Section
3 Tube 4 Tube 5 Tube 6 Tube 7 Tube
14”
17”
20”
23”
26”
32”
38”
—
—
1.75
2.00
2.33
3.00
3.50
—
—
2.25
2.50
2.75
3.50
4.25
—
—
2.67
3.00
3.50
4.33
5.00
—
—
3.00
3.50
4.00
5.00
6.00
2.67
3.25
3.67
—
4.75
5.50
6.75
23 X 7-1/2
3.40 sq. ft. per sec.
Wall
2.25 sq. ft. per sec.
RATING - Square Feet Per Section
Height
3 Tube 4 Tube 5 Tube 6 Tube
1-1/2”
ctr.
1-3/4”
ctr.
1-1/2”
ctr.
1-3/4”
ctr.
1-1/2”
ctr.
1-3/4”
ctr.
1-1/2”
ctr.
1-3/4”
ctr.
14”
17”
19”
20”
22”
23”
25”
26”
32”
—
—
1.10
—
1.30
—
1.50
—
—
—
—
—
—
—
—
1.60
—
—
—
—
1.40
—
1.60
—
1.80
—
—
—
—
—
—
1.80
—
—
—
—
—
—
—
1.80
—
2.10
—
2.40
3.00
—
—
—
—
2.10
—
2.40
—
3.00
1.50
1.80
—
2.20
—
—
—
2.90
—
1.60
2.00
2.30
—
—
—
—
—
3.70
Burnham Slenderized
Recommended System Piping
ONE-PIPE STEAM
Up to 28 sq. ft. ................................................. 1 inch
Up to 62 sq. ft. ................................................. 1-1/4 inches
HOT WATER - Two-Pipe Forced Circulation
Up to 100 sq. ft. ........................... 1/2 inch
101 sq. ft. and larger .................... 3/4 inch
HOT WATER - TWO-PIPE GRAVITY SYSTEM
First floor - Up to 20 sq. ft. ............................... 1/2 inch
21 to 50 sq. ft. .............................. 3/4 inch
51 to 100 sq. ft. ............................ 1 inch
101 to 175 sq. ft. .......................... 1-1/4 inch
Second floor - Up to 30 sq. ft. .......................... 1/2 inch
31 to 70 sq. ft. .............................. 3/4 inch
71 to 120 sq. ft. ........................... 1 inch
121 to 250 sq. ft. .......................... 1 1/4 inch
Third floor - Up to 40 sq. ft. ............................. 1/2 inch
41 to 100 sq. ft. ........................... 3/4 inch
101 to 175 sq. ft. ......................... 1 inch
175 to 300 sq. ft. ......................... 1-3/4 inch
* Plug + Alternate
A B C D E
One Pipe Steam
*
supply +vent vent
*
Two Pipe Steam suppiy +supply
* *
return
Hot Water
*
supply vent
*
return
NOTES:
All sizes based on
steel pipe. Vapor
tappings, top and
bottom opposite
ends; supply 3/4 inch,
return 1/2 inch.
For tappings on
one-pipe hot water
systems see AHRI
Installation Guide.
The last connection
taken off the main
should be run to a
first floor radiator.
Radiators in which
mains terminate
should have one size
larger valves.
Heat Emission Chart
(70°F room temp)
Avg. water
temp in
radiators, °F
Heat
emission
BTU/Hr. per
sq. ft.
150
160
170
180
190
200
210
215
110
130
150
170
190
210
230
240