COMMERCIAL HEATING


Better heating options for bigger spaces


Providing a heating solution for large spaces, such as schools and offices, can present a number of challenges. Richard Lister looks at some of the key considerations when specifying radiators, highlighting a best practice approach.


Richard Lister www.clyderadiators.co.uk


H


National sales manager at Clyde Radiators


The Apex horizontal aluminium radiator provides efficient temperature control


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 can


eating large or complex spaces is rarely a one-size-fits-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 difficult 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 efficiency, 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 stratification, particularly with traditional wall-hung radiators. This occurs when warm air rises and collects at ceiling level, reducing heating efficiency and occupant comfort. For large spaces where floor and wall space may also be limited, radiant panels offer an ideal


Clyde’s Type 21 flat panel radiator offers an easy-to-clean option for commercial environments


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produce panels that are specifically designed to heat rooms with a height between 3 to 30 metres, designed to warm the entire space from above. Forced air systems are 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 efficiency. 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 offices, 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 efficiency, 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 efficient. 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 specification 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 specific room size. Delta-T measures the difference


between the average water temperature in the heating system and the target room temperature, which directly affects 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 efficiently and effectively. By understanding Delta-T ratings, it helps installers to accurately size radiators to avoid underheating or wasted energy and adjust the figures 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 (DOP) 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 verified by a notified body, such as BSRIA. Membership of MARC is also a good indication of credibility. Effective heating specification 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 efficiency and long-term energy performance. ■


EIBI | SEPTEMBER 2026


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