Cast iron radiator heaters blend classic design with durable performance, delivering steady warmth and quiet operation. The following selections from Oswald Supply offer multiple sizes to fit various spaces, while maintaining efficient heating and easy installation. This guide compares key features to help you choose the right cast iron radiator for your home’s heating needs.
| Product | Height | Depth | Length | Tube Count | Type | Notes |
|---|---|---|---|---|---|---|
| Cast Iron Radiator by Oswald Supply (19″ height, 4-7/16″ depth, 14″ length) | 19″ | 4-7/16″ | 14″ | 4 | Steam/Hot Water | Quiet operation; free-standing; multiple sizes |
| Cast Iron Radiator by Oswald Supply (19″ height, 4-7/16″ depth, 17.5″ length) | 19″ | 4-7/16″ | 17.5″ | 4 | Steam/Hot Water | Quiet operation; versatile sizing |
| Cast Iron Radiator by Oswald Supply (25″ height, 4-7/16″ depth, 24.5″ length) | 25″ | 4-7/16″ | 24.5″ | 4 | Steam/Hot Water | Efficient radiator replacement option |
| Cast Iron Radiator by Oswald Supply (19″ height, 4-7/16″ depth, 7″ length) | 19″ | 4-7/16″ | 7″ | 4 | Steam/Hot Water | Compact option for tight spaces |
| Cast Iron Radiator by Oswald Supply (25″ height, 4-7/16″ depth, 7″ length) | 25″ | 4-7/16″ | 7″ | 4 | Steam/Hot Water | Low-profile design with quiet operation |
Cast Iron Radiator, 19″ Height, 14″ Length — Oswald Supply

This 19″ tall, 4-7/16″ deep radiator offers a compact solution for smaller rooms or retrofit projects. Its four-tube design supports both steam and hot-water systems, with a free-standing installation that simplifies setup. Cast iron construction provides robust heat retention and very quiet operation, making it suitable for bedrooms or living spaces where noise is a concern. The unit is available in multiple sizes to match existing radiators or fresh layouts, helping maintain consistent room temperatures.
Cast Iron Radiator, 19″ Height, 17.5″ Length — Oswald Supply

This 19″ high radiator with a 17.5″ length extends coverage for mid-sized rooms while retaining the same 4-tube configuration. The four-tube design improves heat distribution across a wider surface, helping stabilize temperatures more evenly than smaller units. Like the shorter variant, it’s designed for free-standing installation and operates quietly thanks to cast iron’s natural heat retention. It remains compatible with steam or hot-water systems and comes in multiple sizing options for customization.
Cast Iron Radiator, 25″ Height, 24.5″ Length — Oswald Supply

With 25″ height and a generous 24.5″ length, this model covers larger spaces or open-plan rooms. The four-tube configuration supports robust heat output, and the unit remains a quiet operator due to the inherent properties of cast iron. It’s offered as a versatile option within Oswald Supply’s line, intended for steady, even heat delivery in colder areas of the home. Free-standing installation continues to provide straightforward setup for retrofits or new layouts alike.
Cast Iron Radiator, 19″ Height, 7″ Length — Oswald Supply

This compact 7″ length unit is ideal for tight spaces like hallways, entryways, or under windows where full-size radiators may not fit. The four-tube design ensures steady heat diffusion, and the 19″ height maintains compatibility with standard room dimensions. Like other Oswald models, it features free-standing installation and quiet operation, making it a practical choice for targeted heating where minimal footprint is required.
Cast Iron Radiator, 25″ Height, 21″ Length — Oswald Supply

This radiator measures 25″ in height and 21″ in length, delivering fuller coverage across larger spaces while maintaining four-tube efficiency. It’s designed for free-standing installation and operates with the quiet efficiency expected from cast iron designs. The height and length balance provide a strong thermal mass, enabling stable ambient temperatures even during cooler evenings or in draft-prone rooms. A suitable upgrade for homes seeking an enduring, classic heating solution.
Cast Iron Radiator, 25″ Height, 6-5/16″ Depth, 10.5″ Length — Oswald Supply

Featuring a deeper profile at 6-5/16″ depth, this model provides substantial hot-water or steam heat capacity in a relatively compact footprint. The 10.5″ length supports practical wall mounting in narrow rooms or alongside furnishings that limit space. It retains the cast iron advantages of quiet operation and long service life, with a free-standing installation for simple setup. This option suits homeowners seeking a balance between heat output and spatial constraints.
Cast Iron Radiator, 25″ Height, 6-5/16″ Depth, 17.5″ Length — Oswald Supply

This 25″ tall radiator with a 17.5″ length provides a mid- to large-room solution with a balanced heat spread. The four-tube configuration supports even distribution, and the unit remains a free-standing installation option for straightforward retrofits. Cast iron’s thermal mass ensures consistent warmth over time, contributing to energy-efficient heating and reduced temperature fluctuations in living areas or studios.
Cast Iron Radiator, 25″ Height, 7″ Length — Oswald Supply

This model emphasizes a shorter length for a tall, slim footprint, suitable for narrow walls or alcoves. The 7″ length still harnesses four tubes for effective heat output while maintaining a compact profile. Installation remains free-standing, with the same quiet operation and durable cast iron construction that characterizes the Oswald line. It offers a practical option where wall space is at a premium but steady heat is needed.
Cast Iron Radiator, 25″ Height, 6-5/16″ Depth, 10.5″ Length — Oswald Supply

This option combines a tall profile with a compact 10.5″ length, resulting in a radiator that can fit elongated spaces such as corridors or behind large furniture. The four-tube construction delivers consistent heat, while free-standing installation supports quick setup. Cast iron’s natural quietness and heat retention contribute to a comfortable and stable living environment in spaces where layout flexibility is essential.
Buying Guide: Key Purchase Considerations
- Space and layout: Measure room height, wall width, and available floor space. Shorter lengths fit tighter areas, while taller models increase surface area for heat distribution.
- System compatibility: Confirm whether your home uses steam or hot-water heating. Most models in this selection support both, but verify radiator connections and valve compatibility.
- Heat output and room size: Cast iron radiators rely on thermal mass for steady warmth. Bigger rooms benefit from taller and longer units with more tubing, while smaller rooms can use compact options.
- Installation: Free-standing units simplify retrofits but may require clearance from walls for optimal convection. Ensure floor stability and level mounting for safety and efficiency.
- Noise and durability: Cast iron radiators are known for quiet operation and long service life. Consider finish quality and compatibility with room aesthetics if you’re pairing with vintage or modern interiors.
- Maintenance: Periodic checks for scale buildup and valve functionality help maintain efficiency. Choose models with accessible fittings for easier maintenance.
- Energy considerations: Radiators with higher surface area generally provide broader heat distribution, reducing cold spots and improving perceived comfort at lower ambient temperatures.
In sum, these Oswald Supply cast iron radiators span compact to larger footprints, offering quiet operation, durable construction, and flexible sizing. The right choice balances room dimensions, plumbing compatibility, and desired heat coverage to maintain a comfortable home environment.