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

• Slim, decorative radiator featuring a distinctive half-round (semicircular) profile.
• Based on the classic Triga model, retaining its chunky, rectangular bar style in a curved form.
• Note:
• Triga AN – narrower semicircle model, 230mm wide, ideal for tighter spaces.
• Triga AW – wider semicircle model, 430mm wide, suitable for larger walls or as a stronger design feature.
• Contemporary, sculptural aesthetic suitable for living rooms, hallways, kitchens, and bathrooms.
• Classic decorative radiator with chunky rectangular bars measuring 30x40mm (3x4cm).
• Bars have presence and form, providing a substantial, sculptural look rather than thin, understated lines.
• Durable steel construction ensures long-lasting performance.
• 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 2 different sizes of TRIGA AW 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 Bottle Green (premium wet paint).
• Finished in a metallic, smooth texture.
• This is a premium wet paint applied using a hand-finished liquid process (as opposed to an automated powder paint), creating a deeper, more metallic finish.
• Note: If you don't have the budget for a premium wet paint, the closest colour match in powder paint would be the Green Chlorophyll colour, which is slightly darker and costs approximately 25% less. Please call us to request this colour.
• Additionally, we have created a thorough and detailed technical guide on paint finishes and colours, giving even more information and tips.

installation & orientation

• Designed exclusively as a vertical radiator and cannot be installed horizontally.
• 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 have such a vast selection of styles & colours to choose from. We do not include them (like some other retailers) as we cannot make this choice on your behalf.
• However, we make choosing the correct valves very easy for you. With our years of experience, we know once homeowners have chosen their r