PHAM NEWS | JUNE 2026 Light CommercialHeating 31


Better heating options for bigger spaces


Providing a heating solution for large spaces, such as schools and offi ces, can present a number of challenges. Here, Richard Lister from Clyde Radiators looks at some of the key considerations when selecting and installing such heating systems, highlighting a best practice approach.


H


eating large or complex spaces is rarely a one-size- fi ts-all decision. Larger areas such


as school halls, warehouses, industrial units and sports facilities each present unique challenges that often make heating them expensive and diffi cult to control. High ceilings, poor insulation and uneven heat distribution can all contribute to energy waste and uncomfortable environments. Selecting appropriate


heating solutions will have a huge impact on the space – from maintaining comfort and productivity, as well as improving energy effi ciency, reducing operational costs and helping to meet any sustainability targets or aims. As such, taking the time to consider the issues, seeking technical guidance, and researching the latest product solutions can help ensure the best results.


High ceilings A common issue when heating rooms with high ceilings is heat stratifi cation, particularly with traditional wall-hung radiators. This occurs when warm air rises and collects at


ceiling level, reducing heating effi ciency and occupant comfort. For large spaces where fl oor and wall space may also be limited, radiant panels off er an ideal solution. They can be suspended on the ceiling, making use of this unused space and providing a better, even heat distribution for the room. Manufacturers such as Clyde


Richard Lister National sales manager at Clyde Radiators


can produce panels that are specifi cally designed to heat rooms with a height between 3 to 30 metres, designed to warm the entire space from above. Forced air systems are


Effective heating specification is about far more than simply achieving target temperatures


commonly used for heating larger spaces, however blowing air can stir up and circulate dust, pollen and other allergens, leading to a drop in air quality. They also naturally decrease indoor relative humidity and the dry air can become an irritant. Conversely, radiant panels


heat the space without drying out the indoor air, creating a more pleasant environment. They also emit 70 to 80% of their heat in the form of heat radiation, converting into thermal energy upon contact with an object or person – and avoiding any circulation of dust or allergens.


Energy effi ciency Another factor to consider when selecting heat emitters for larger spaces is energy effi ciency. It is vital to ensure that the heating is properly managed to guarantee optimum temperatures are maintained. For educational facilities in particular, the Department for Education states that parts of the building, such as classrooms and offi ces, should be capable of being heated to a minimum of 18°C. For other teaching accommodation, washrooms and circulation areas, it should be 15°C. To minimise energy waste


and improve effi ciency, aluminium heat emitters are a great solution. Aluminium reacts rapidly to changes in temperature, allowing it to heat a space more quickly, making them easy to control and thermally effi cient. Since they are lightweight, they are also suitable for the majority of projects and can help make the installation process easier, reducing the amount of time needed on site as well as minimising disruption to occupants. Additionally, aluminium is fully recyclable once it reaches the end of its functional lifespan.


Correct Delta-T A further consideration in radiator specifi cation is choosing a product with the correct Delta T for the system. This is essential to ensure that the radiator maintains uniform warmth and optimises energy consumption so that it performs as intended for the specifi c room size. Delta-T measures the diff erence between the


average water temperature in the heating system and the target room temperature, which directly aff ects the radiator’s heat output. In large spaces, the heat demand is much greater, so selecting a radiator with the right Delta-T rating ensures the space can be heated effi ciently and eff ectively. By understanding Delta-T


ratings, it helps installers to accurately size radiators to avoid underheating or wasted energy and adjust the fi gures to ensure the heat output matches the system.


Tried and tested It is also advisable that products should only ever be sourced from manufacturers who can back up their product information with legally required product testing. According to UK and EU


law, manufacturers have a legal obligation to supply a Declaration of Performance for each radiator if requested. If this is not available, the product should not be used. Installers should also check the DOP to ensure the test data has been independently verifi ed by a notifi ed body, such as BSRIA. A membership of MARC is also a good indication of credibility. Eff ective heating


specifi cation is about far more than simply achieving target temperatures. By carefully considering factors such as heat distribution, system responsiveness and Delta-T calculations, installers can ensure the best possible solution – one that balances occupant comfort, operational effi ciency and long-term energy performance. ◼ phamnews.co.uk/626/34


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