82 HEATING, VENTILATION & SERVICES


When specifying a controlled ventilation system, it is not only the unit you need to be aware of but also the ducting, as this is an integral part of any system


highly efficient heat exchanger.


• The systems have high thermal efficiency coupled up with low electrical energy consumption, resulting in exceptionally low cost, and energy efficient systems.


• No build-up of air pollution and vastly improved indoor air quality through filters within the units. There are various filter options relating to specific allergies and families’ needs.


• Removes bad odours while preventing mould, fungus and dust mites.


• Preserves the dwelling fabric with constant ventilation.


The number of flats and apartments being built has risen over the last decade, including in built-up areas. The traditional wall and floor-mounted MVHR units are often too big to service these spaces, so smaller units have been introduced onto the market to enable this technology to be used in new urban developments. The smaller units have the same features and benefits as the larger units, which are used in homes of two or more bedrooms, but on a smaller scale. When specifying a controlled ventilation


system, it is not only the unit you need to be aware of, but also the ducting, as this is an


integral part of any system. There are many systems in the market from various manufacturers, all with different characteristics such as semi-rigid, radial duct systems.


All systems have their own benefits, but the key function to look at when specifying is the air leakage risk, and this can be determined by the class it has been tested to; D being the highest class. Systems that require less connections will be more airtight, making the full system more efficient, providing optimal results with lower pressure losses. Other issues that a semi-rigid radial duct system can eliminate include cross talk from one room to another, and noise levels through the ducting. In conclusion, there is a growing demand for quality MVHR systems, plus a desire to include a high performance, low energy consumption unit, complemented by a superior duct system whose benefits include ease of install (less connections), extremely low noise levels and the elimination of any cross talk. This would be the ultimate solution for all home owners.


Grant Holmes is national key account manager at Ubbink


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ADF APRIL/MAY 2020


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