This article provides information on steel and cast iron radiators, how to distinguish them visually, and how to determine their depth, height, and number of sections.
Steel Radiators:
Steel radiators are made from sheet steel and have a smooth, rounded surface. They are lightweight, easy to install, and offer good thermal conductivity. Steel radiators come in various sizes, shapes, and designs, including panel radiators and tubular models. Visually, steel radiators can be identified by their smooth surface and precise edges. The width of a steel section is typically 50 mm.
Cast Iron Radiators:
Cast iron radiators are made from cast iron and have a rough, uneven surface. They are heavier than steel radiators and retain heat longer, providing more consistent and long-lasting heat output. Cast iron radiators are often found in older buildings and feature a classic, decorative design. They can be recognized by their textured surface and ornate detailing. The width of a cast iron section is usually 60 mm.
Determining Depth, Height, and Number of Sections:
Depth:
To determine the depth of a radiator, measure the distance from the back edge to the front edge. For cast iron radiators, the depth can vary, as each section may be shaped differently. Steel radiators typically have uniform depth, making them easier to measure.
Height:
The height of a radiator is measured from the bottom edge to the top edge. For steel radiators, the height is generally consistent and easy to measure. Cast iron radiators may vary in height, especially older models with irregular shapes.
Number of Sections:
The number of sections refers to the individual vertical elements that make up the radiator. For steel radiators, count the number of vertical tubes or fins. For cast iron radiators, count the number of cast iron sections. Keep in mind that each section may differ slightly in shape.
Source: Recknagel (2020): Handbook for Heating and Air Conditioning Technology