Product Description

The Primo is our flagship panel radiator, boasting 3rd generation technology, which makes it the most efficient panel radiator on the market today. With its distinct 25mm waterway pitch and convector fin design, the Primo offers the greatest outputs per square metre and per kilogram of steel. A modern version of a classic radiator, durable and versatile is available with a standard four-tap connection. 

The Primo also has the best dynamic system response with the lowest water content per watt. Merriott’s factory has also a low carbon footprint due to sourcing our steel from just 37 miles away from our manufacturing facility in South Wales.

Available in four configurations to meet your output requirements, the Primo is a cost-effective solution which provides heat quickly to even the largest commercial spaces. Choose from five heights with lengths ranging from 300mm to 2m. With Merriott’s 3rd generation technology, you can opt for a smaller radiator without compromising on heat output. This makes for lower capital cost expenditure and lower running costs in the future.

Primo has been verified by the Energy Saving Trust

* Heat output at a ∆T 50 and 30°C from the  T11 and T22 Primo and Primo Plus radiators, compared to the main market competitors. Using British Standard testing data from EN 442-1:2014 standard. Correct as of July 2016 and valid till September 2019.


Technical Drawings


Installation Instructions

Download installation instructions here.


Primo and Primo Plus


Merriott products are guaranteed for a period of 10 years from date of purchase in respect of defective materials and workmanship. The system should be designed in accordance with British Standard Code of Practice for Water Based Heating Systems in Buildings BS EN 12828:2012+A1:2014 and BS EN 12831: 2003. The installation and commissioning of the system should comply with BS EN 14336:2004. On completion of the installation, the system should be properly flushed and filled in accordance with the British Code of Practice for the Treatment of Water in Domestic Hot Water Central Heating Systems BS 7593:2006, Part L of Building Regulations and Good Practice Guidance for Scotland. Merriott strongly recommends the use of corrosion inhibitor for all applications. Failure to observe these standards may invalidate the manufacturer’s warranty.

Currently, there is no BIM available for this radiator.