Here at the heat is on, we put the knowledge of what you need directly in your hands as the homeowner, so you needn’t ask or wait for information from your plumber. Here we give you complete expert guidance for this specific designer radiator — including details of any additional parts required — so you can ensure a smooth and successful installation when your tradesman arrives.

heat output

• Firstly, if you haven't already done so – use our heat calculator to work out your specific requirements for your room, ensuring you are selecting the correct size designer radiator in terms of the BTUs heat output it provides.

design & material

• PLAIN 3 COLUMN is a minimalist freestanding cast iron radiator designed for modern interiors.
• Clean, understated aesthetic with no ornate detailing, offering a contemporary alternative to traditional cast iron styles.
• 3-column construction, with each section formed from two deep columns for a balanced blend of style and performance.
• Produced in Europe with superior craftsmanship, ensuring precise casting and high-quality finishing.
• Solid cast iron build provides slow cool-down, long-lasting even radiant heat, durability, and excellent heat retention.
• Strong heating performance suitable for living spaces, hallways, and period–modern blended interiors.
• Additionally, we have created a thorough and detailed technical guide on central heating radiators, giving even more information and tips.

full range of sizes available

• In addition to the sizes we are displaying here on the heat is on, you can view the full range of 128 different sizes of PLAIN 2 COLUMN here on the Terma website.
• When viewing the Terma website, heat outputs are only listed in Watts – using the column header stating 75/65/20, multiply the amounts by 3.41 to get the BTUs equivalent.
• If you want to learn more about heat output, view our technical guide on heat output.
• We can process a special order for any size you wish to purchase if that size is not shown on our website.

colour & finish

• Painted in Antique Brass – a brass undetone with darker accenting.
• Additionally, we have created a thorough and detailed technical guide on paint finishes and colours, giving even more information and tips.

installation & orientation

• Freestanding cast iron design suitable for a wide range of room layouts.
• This radiator will be delivered on a pallet; please remember that cast iron radiators are very heavy.
• Compatible with standard central heating systems.

advice on which valves to purchase for piped installation (central heating)

• This radiator is not supplied with valves, as we offer a vast range of styles and colours. We do not include them because we cannot make this aesthetic choice on your behalf.
• We make choosing the correct valves easy. With years of experience, we know once a radiator has been chosen, valve selection can feel daunting — and even plumbers rarely make the best aesthetic choice. As the homeowner, this decision is best made by you.
• On the right-hand side of this page we have pre-filtered our valve selection to show only the optimal valves for this specific model. You’ll see two sections:
  • 1. matching / complementary colour valve & pipe sets — note: we don’t offer any matching colour valves for this specific colour.
  • 2. standard valve & pipe sets — more economical standard valves which are not painted to match the radiator. Pipes and covers must be purchased separately.
• Which orientation of valves do I need: 3-axis (corner), straight or angled?
  • 1. Pipework through the wall — possible, but not typical for this style of radiator. Wall-fed installations require 3-axis corner valves.
  • 2. Pipework through the floor — preferred option for this model; use angled valves.
• Additionally, we have created a thorough and detailed technical guide on radiator valves, giving even more information and tips.

safety & compliance

• Fully built and tested to EN442 standards and UKCA certified.
• Heat outputs are independently verified by an external testing house to ensure accuracy.

guarantee & warranty

• Supplied with a 12-year manufacturer’s warranty for long-term reassurance.