Do Cast Iron Radiators Give Out More Heat?

Posted: Friday, July 12, 2024

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When upgrading a heating system or renovating a property, a common question arises - do cast iron radiators give out more heat? Choosing the right radiator can impact comfort so let’s explore the unique properties of cast iron radiators and compare them to other popular radiator types, to help you make an informed decision for your home.

Do Cast Iron Radiators Give Out More Heat

How Does A Radiator Heat A Room?

Before answering the question, ‘Do cast iron radiators give out more heat?’, we must first explore how radiators warm the space around them. Understanding the mechanics of heat distribution helps to inform the unique advantages of Trads’ cast iron range.

  1. Central Heating System - The boiler delivers hot water to a radiator via pipework. This heats the metal surface of the radiator.
  2. Air Circulation - As the air in contact with the radiator warms up, it becomes less dense and rises. This creates a cycle where cooler air is drawn towards the radiator, gets heated and then rises.
  3. Warm Air Distribution - The warm air rises to the ceiling, cools down, and then descends back to the floor. This circulation of air, known as convection currents, helps distribute heat throughout the room.
  4. Radiant Heat: Radiators also emit infrared radiation, which directly warms objects and surfaces in the room, such as walls, furniture and people. This form of heat transfer does not rely on air movement and can provide an immediate sense of warmth.

Do Cast Iron Radiators Give Out More Heat Than Other Models? 

The answer to this question is complex. Do cast iron radiators give out more heat? Technically, no. The heat output is determined by the temperature setting of the heating system, which is the same for all types. If a valve is set to 20℃, that will be the maximum heat output, whether the radiator is made from cast iron, steel or aluminium. 

That said, cast iron radiators retain heat for a much longer period due to their high thermal mass. This means that once they are heated, they continue to release heat for an extended time, even after the boiler is turned off. The prolonged heat retention of cast iron radiators provides consistent warmth, reducing the need for the heating system to frequently cycle on and off. This can lead to a more stable and comfortable room temperature over time, as the radiator gradually releases its stored heat. So, do cast iron radiators give out more heat? If the time they remain warm is taken into consideration, it could be argued that yes, they do. 

Do Cast Iron Radiators Give Out More Heat When Thermostatic Valves Are Added? 

No, adding thermostatic valves to cast iron radiators does not cause them to give out more heat overall. However, thermostatic valves improve the efficiency and control of heat distribution. A thermostatic valve works by automatically adjusting the flow of hot water into a radiator to maintain a preset room temperature. By preventing overheating, they can reduce energy consumption. This means the heating system can operate more efficiently, potentially lowering heating costs. What’s more, thermostatic valves can help distribute heat more evenly throughout a home by ensuring that each radiator receives the appropriate amount of hot water based on the room's requirements.

Do Cast Iron Radiators Give Out More Heat Over A Long Period? 

Cast iron radiators take longer to heat up initially because of their high thermal mass. However, once heated, they also take a longer time to cool down. This results in a more gradual temperature change, leading to fewer and less pronounced temperature fluctuations within the room. This is particularly beneficial on cold winter nights. Cast iron’s extended heat retention provides consistent warmth and can improve overall comfort, especially in bedrooms where stable temperatures contribute to better sleep quality. While they take longer to heat up, this can be managed by programming the heating system to start earlier in the evening. 

Why Choose A Cast Iron Radiator?

Do cast iron radiators give out more heat than their steel counterparts - no, it’s a level playing field - but we believe there are plenty of reasons why they should still be favoured over other models. Cast iron radiators are renowned for their timeless, vintage charm that can enhance the visual appeal of any room. With a range of designs from ornate to minimalist, they fit into both traditional and contemporary settings, and being hand-built to order, they are manufactured to the exact dimensions for their setting. 

Smart valves can be integrated into all of Trads’ cast iron radiators, adding a modern touch to a traditional heating system. This allows for precise control over heating, improving energy efficiency and enhancing convenience. Furthermore, cast iron radiators are incredibly durable, with a robust construction that ensures longevity and reliability. This durability translates to fewer repairs and replacements, making them a cost-effective and worry-free heating solution in the long run.

Trads’ Cast Iron Radiators 

Choosing Trads for your cast iron radiator needs ensures you receive exceptional quality and personalised service. Here’s how we stand out:

Hand Assembly: All of our radiators are hand-assembled to ensure precision and quality.

Quality Workmanship: In 2023, we partnered with Made Smarter East Midlands to upskill our workforce and refine our painting and assembly processes. Advanced automation was integrated into manufacturing operations resulting in a higher quality end product. Superior craftsmanship ensures durability and reliability.

Made To Order: Customisation options allow the size, BTU output and overall finish to match room requirements.

Knowledgeable Staff: Expert guidance from sales to engineers ensures a smooth and informed purchasing process.

Colour & Finish: With over 10,000 colours and finish, options, we can create the perfect radiator for any space. 

Lifetime Guarantee: All of our radiators come with a lifetime warranty, demonstrating our confidence in the durability of our cast iron range. 

Like-for-Like Price Match: We offer a price match service so if a like-for-like radiator is found cheaper from another company, we’ll match the cost. 

Get In Touch

To view the full range of Trads’ cast iron radiators, visit our website or book a factory and showroom tour. Email sales@tradscastironradiators.co.uk for enquiries, or call +44 800 102 6819 to speak with one of the team directly.  

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