The first generation Marsden-supplied radiator has a capacity of 1.1 gallons, 4 rows of tubes, and l7l square inches of frontal area.
The next generation (Stanpart) has a capacity of 0.62 gallons, 3 rows of tubes, and 150 square inches of frontal area.
The final (Stanpart) unit has a capacity of 0.55 gallons, 2 rows of tubes, and 150 square inches of frontal area.
An alternative is an original Type 14 radiator with an l.0-gallon capacity, 3 rows of tubes, and 2l0 inches of frontal area. Plus, it is much more pleasing to view with its polished brass, rounded top header tank.