Fan-assisted radiators, like Myson Ulow E2, and fan convectors such as Myson iVector S2, can even operate comfortably below 40°C. Highly responsive underfloor heating is also well-suited to low-
temperature operation. Hybrid solutions, which combine radiators and underfloor heating, can often provide the best balance of comfort and efficiency in renovation projects.
Saving Energy, Step by Step In an ideal world, both building owners and the planet would reap substantial energy savings through a single intervention. In practice, however, efficiency improvements tend to unfold gradually, with upgrades implemented as budgets, timelines and project priorities allow. This incremental approach formed the basis of a study
commissioned by Myson several years ago. Whilst building methods and heating technologies have continued to advance, the fundamental principles of thermodynamics remain unchanged, making the insights from that simulation just as relevant for today’s renovation and retrofit strategies.
Comparing Old and New Heating Systems
Overall, the study shows that integrating these measures can yield 15-30% energy savings compared with the original setup, together with noticeably improved indoor climate comfort for the building’s occupants.
Energy Savings as a Gradual Journey Our study highlights that meaningful energy efficiency is rarely achieved through a single upgrade; it is a cumulative, step-by- step process. When the building envelope is properly insulated and U-values are optimised, renovating the heating system with a modern heat source, low-temperature radiators and correct hydraulic balancing can deliver substantial, long-term energy savings.
Phase 1: No energy-saving measures applied Phase 2: Building insulation upgraded Phase 3: Old sectional radiators replaced with modern low-temperature emitters
The existing building uses a gas boiler as the heat source.
The study examines an 18m² living space and tracks how targeted interventions affect energy demand. Initially, the room requires 125W/m² – around 2,250W in total – which is covered by traditional column radiators (110/600, DIN 4703) operating at 90/70/20°C. At these temperatures, the required radiator length is 1,600mm. Upgrading the building’s thermal insulation is the first step.
This almost halves the heat demand to 1,170W, enabling a reduced temperature regime of 62/50/20°C. While the existing boiler can operate at these lower temperatures, switching to a condensing boiler further boosts system efficiency. To match the new operating conditions and drive additional
energy savings, the study then replaces the column radiators with type 22 panel radiators in the same length, 1,600mm. These emitters allow temperatures to drop further to 50/41/20°C, well within the optimal range for modern low-temperature systems.
Reduced Consumption, Higher Comfort The combined measures deliver clear benefits. Improved insulation reduces heat losses and prepares the building envelope for future low-carbon technologies, including heat pumps. Lower system temperatures minimise distribution losses and unlock the full potential of condensing boilers. Meanwhile, modern radiators offer more responsive control, supporting precise temperature management and further reducing consumption.
Decarbonising Buildings Even small interventions, such as upgrading to more modern heating controls or adding smart heating controls, helps to upgrade an existing heating system and further optimise fuel consumption. The right use of core control elements improves efficiency and energy use, subsequently reducing carbon footprint.
Complete Solutions for Every Need Myson has a wide range of products suitable for low temperature heating systems, including vertical and horizontal panel radiators, designer radiators, fan-assisted radiators, intelligent fan convectors, underfloor heating, towel warmers and space saving plinth heater. A broad range of hydronic and electronic controls are available to suit any application.
JT6
www.myson.co.uk
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