Steam heating systems that use cast iron steam radiators--valve-controlled cast iron coil assemblies--distribute steam through a series of pipes throughout a building. Many people find cast iron steam radiators difficult to clean as the hot radiator surfaces attract dust, dirt and other debris. In addition, the paint applied to the radiator’s surfaces to increase heating efficiency can easily fleck or peel with little scrubbing or abrasion. Cleaning cast iron steam radiators is not impossible because you can easily remove most dirt with a vacuum and/or duster and mild or gentle cleaning products.
Things You'll Need
- Duster, optional
- Plastic drop cloth
- Mild detergent
- Microfiber cloths
- Soft-bristled brush, optional
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Turn the radiator valve(s) at the base of your cast iron radiator to shut off the steam and cool your radiator's surface. If you are pre-cleaning and have not turned on your radiators, skip this step.
Attach a soft-bristled brush or upholstery brush head to the hose of your vacuum and lightly vacuum dust, dirt, cobwebs or other debris from your cast iron steam radiator's coils, valve(s) and/or heat reflector (if applicable) as well as the floor and baseboard. If the brush head will not fit into certain areas (between coils or under/behind the radiator), dust the areas with a fabric thread-style or microfiber style duster.
Lay a plastic drop cloth on the floor beneath and around your radiator before cleaning with soap and detergent so that you protect the floor.
Wipe your cast iron steam radiator--coils, valves and pipes--with a soapy lint-free microfiber cloth. Wait 10 minutes for the chemicals in the detergent you used to break up any oils clinging to the radiator's surfaces. In addition, wipe your foil reflector (if applicable).
Rub a damp sponge over all the radiator surfaces to remove the soap residue. Rinse the sponge and repeat as needed.
Blot undiluted mild detergent on caked-on dirt and stains. Wait 10 to 20 minutes. Rub with a damp sponge to remove the dirt, oil or staining material and then rinse.
Remove the plastic drop cloth.
Turn the radiator valve(s) on to dry the radiator and surrounding surfaces. If a great deal of moisture remains or you skipped Step 1, dry the radiator, pipes, floor, baseboard and/or heat reflector with soft, lint-free microfiber cloths.