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Heritage Design, Modern Efficiency
We design all of our custom cast iron radiators to integrate seamlessly with existing steam systems. With fully bespoke sizing we can work around any space restrictions or requirements you may have.
Our valves, including our new Windsor One-Pips Steam TRV, are designed to be sympathetic with both original and new cast iron radiators and come in complimentary metallic finishes for a connected, traditional look.
If you have one-pipe or two-pipe steam heat and would like to explore restoring or upgrading your cast iron radiators, book a one-to-one consultation with us today.
Image: The Rococo 2 Column 30in steam radiator equipped with the Windsor One-Pipe Steam TRV.
How Much Do Steam Radiators Cost?
The prices below are averaged across our entire range. They include the cost of the steam radiator and all accessories required for installation.
| Signature Collection | Farrow & Ball or Little Greene | Bare Metal | |
| Small Radiator | $1,500 | $1,600 | $2,000 |
| Medium Radiator | $1,825 | $2,075 | $2,750 |
| Large Radiator | $2,150 | $2,550 | $3,500 |
A medium-sized detached house typically requires about 12 radiators costing an average of $20,000 to $35,000 dependent on finish.
Image: The Mercury 4 Column 14in steam radiator equipped with the Niva One-Pipe Steam TRV.
Local Law 97 And Steam Heat
Experts agree that New York’s steam heating does have a future in the city post-LL97. With simple ‘no-brainer upgrades’ recommended by New York’s Urban Green Council even antique steam systems can run quietly and efficiently.
Retrofitted with properly sized vents and thermostatic radiator valves (TRVs), steam systems provide efficient and balanced heat.
View Our Steam TRVs
Image: The Mercury 4 Column 14in steam radiator finished in Little Greene’s ‘Windsor’.
Sustainable Steam Radiators
According to NYC Retrofit Accelerator, steam systems “often lack sufficient air venting for today’s fuels and operate boilers that are more than twice the size needed to deliver cost-effective and high-quality heat.
Fortunately, with proper maintenance and a few simple upgrades, both one-pipe and two-pipe steam systems can provide efficient, reliable, and balanced heat for years to come.”
Veteran steam specialist Dan Holohan has demonstrated just how efficient steam heat can be, most recently for our friends at The General Society of Mechanics and Tradesmen on West 40th St, Midtown Manhattan. His upgrades to the Society’s 1890s two-pipe steam system included lowering the boiler pressure and introducing steam TRVs in combination with adequate master venting.
As a result, the 130-year-old seven-storey structure now consumes 43% less steam and has achieved an A-rating for building energy efficiency.
Learn more about how it was done
Image: A restored ARCo steam radiator by the American Radiator Company equipped with the Niva One-Pipe Steam TRV.
Restore Steam Radiators To Save Embodied Carbon
LL97 places its focus firmly on operational carbon – the emissions released during the day-to-day running of a building. When retrofitting older properties it’s also crucial not to disregard embodied carbon. Sustainability is boosted when you choose products with the longest possible lifespan and prioritise recycled materials.
Our steam radiators have a lifespan of centuries and they’re made from scrap iron. Retaining and restoring your antique radiators preserves embodied carbon within your home and safeguards a unique piece of history.
Explore Steam Radiator Restoration
Image: A restored Rococo steam radiator by the American Radiator Company equipped with the Niva One-Pipe Steam TRV.
