www.heatingandventilating.net


Well-being in buildings By making all the crucial factors, including humidity


control, available ‘on demand’ you can minimise the amount of energy needed to achieve the ideal conditions. Rather than simply ramping up the ventilation – a hammer to crack a nut – you target your response and make it more effective AND sustainable. With COP26 delegates tying themselves in knots


such as eye irritation, and dryness of nose and throat. At 23% humidity, 70% of flu particles can cause infection an hour after they are introduced to the air, but at 43% humidity that drops to 14%. The solution is to measure what is happening in the


occupied space and then use demand-control to create a healthy indoor climate with the lowest possible energy consumption – and the best lifecycle return. Doug Booker, chief executive on National Air Quality Testing Services (NAQTS), told the BESA Conference


that the retrofit revolution proposed by George Clarke would need to be powered by performance data. “You can’t improve what you can’t measure,” he said. The secret is being able to visualise the problem i.e.


make the invisible visible by using digital systems to accurately map the level of contaminants in the air that need diluting and the volume and direction of airflows in the space that will protect human occupants from the risk of disease transmission and exposure to sources of respiratory infection.


over the wording of complex agreements, our industry can certainly play its part by proposing and developing relatively straightforward solutions, like demand- controlled ventilation, that go right to the heart of the matter and contribute to a general improvement to indoor environmental quality (IEQ) without the carbon penalty. The Swegon WISE system is a practical application of this approach as it can already adjust the indoor climate to deliver what the building needs at any given moment by optimising airflows. A newly added water optimisation feature uses data input from each room that is used to control the heating and cooling system, resulting in a further decrease in energy consumption of up to 15%. That is real progress, but we also need to get to


the next level, beyond optimised products. We need to collect information from outside the system, such as weather predictions and up to the minute costs of electricity. By combining this information with data from the products we can create smarter buildings and develop smarter products that find the critical balance between energy use and the health, well- being, and productivity of people.


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This is an ART 55 Press-Fit Ball Valve


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