Cast Iron Radiator Heating Capacity Guide
Page 3 - EDR Ratings and Square Feet Per Sections
Column or Tube Type Radiator EDR Chart (# of tubes/height)
|
13" |
16" |
18" |
20" |
22" |
23" |
26" |
30" |
32" |
36" |
38" |
45" |
| 3 Tubes |
|
|
|
1.72 |
|
2.00 |
2.33 |
3.00 |
|
3.50 |
3.50 |
|
| 4 Tubes |
|
|
|
2.25 |
|
2.50 |
2.75 |
|
3.50 |
4.25 |
|
|
| 5 Tubes |
|
|
|
2.67 |
|
3.00 |
3.50 |
4.33 |
4.33 |
5.00 |
6.00 |
|
| 6 Tubes |
|
|
|
3.00 |
|
3.50 |
4.00 |
|
5.00 |
|
|
|
| 7 Tubes |
2.60 |
3.50 |
|
4.20 |
|
|
4.75 |
|
|
|
|
|
| 1 Column |
|
|
|
1.50 |
|
1.67 |
2.00 |
|
2.50 |
|
3.00 |
|
| 2 Cols. |
|
|
|
2.00 |
|
2.33 |
2.67 |
|
3.33 |
|
4.00 |
5.00 |
| 3 Cols. |
|
|
2.25 |
|
3.00 |
|
3.75 |
|
4.50 |
|
5.00 |
6.00 |
| 4 Cols. |
|
|
3.00 |
|
4.00 |
|
5.00 |
|
6.50 |
|
8.00 |
10.0 |
| 5 Cols. |
3.00 |
3.75 |
4.50 |
5.00 |
|
6.30 |
7.00 |
|
8.50 |
|
10.0 |
|
- Find the Sq. Ft. EDR per section above
- Multiply by the number of sections altogether in that radiator
to get Sq. Ft. EDR for the entire radiator
- Multiply by 240 BTUs per hour to get the steam design output
or Multiple by 170 BTUs per hour to get the hot water design
output
Forgot how to identify &
measure radiators?
Wall Radiator EDR Ratings
All wall radiator may be composed of one or more flat wall hung
sections. Each section can be best identified by measuring in
inches its height, its width and its depth or thickness. Jot down
those measurements then use the following chart to find the Square
feet EDR of the section closest to those dimensions.
| Height |
Width |
Thickness |
EDR |
| 13" |
15 5/8" |
2 7/8" |
5 |
| 13" |
21 7/8" |
2 7/8" |
7 |
| 22" |
13 3/16" |
3 1/16" |
7 |
| 18" |
29 1/16" |
2 7/8" |
9 |
| 29" |
18 5/16" |
3 11/16" |
9 |
|
Wall Radiator |
- Find the Sq Ft EDR per section above
- Multiply by the number of sections altogether in that radiator
to get Sq. Ft. EDR for the entire radiator
- Multiply by 240 BTUs per hour to get the steam design output
or Multiple by 165 BTUs per hour to get the hot water design
output
|