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Fläkt Woods, a leading manufacturer of ventilation and air movement products, has helped a prestigious archives & records building reduce energy consumption across its buildings through upgrading from belt driven centrifugal fans to highly efficient plug fans.



The buildings archive, containing 1,000 years of history with records from parchment and paper scrolls through to digital files and archived websites. Crucially, the site is visited by thousands of visitors each year, and as such, the quality of the air circulated within the buildings must achieve sufficient comfort and air quality levels, whilst cutting energy and carbon too.


Opening back in 1977, the building featured outdated fittings and inefficient Air Handling Units (AHUs). The previous centrifugal fans made up a large part of energy consumption in the AHUs, being driven by a motor in a belt and pulley arrangement and therefore resulting in inhImage removed.erent energy losses and high running costs. The upgrade saw each fan being replaced with a high efficiency plug fan and connected via a variable speed inverter drive. The control parameters design was also adapted, to ensure both fans run continuously in parallel to further improve the energy savings. The new Fläkt Woods plug fans also meet the required fan power energy reduction targets and are ErP compliant.


The purpose of the first phase of upgrade works was to reduce energy consumption and provide additional service life from the existing AHUs located in the North, East, South and West quadrants of the building. This reduced monthly energy consumption per unit from £107.75 to £16.61, with a total of 10,805.6t of CO2 predicted to be saved across the subsequent year. This phase of works has a payback period of 2.9 years, meaning the building will soon begin to see a saving in operational costs.


The second phase of upgrades was aimed at extending the reduced energy consumption and additional service life acheived in the first phase, but this time to the existing AHU’s located in the repositories. Where each unit was historically fitted with a centrifugal fan with a run and standby motor, each of the fans were again replaced with a high efficiency plug fan and connected via a variable speed inverter drive. This second phase achieved a monthly reduction in unit cost from £63.30 to £18, with a CO2 saving of 259.14t across the year. Phase two is set to have a payback of just 1.8 years.


The service & energy solutions engineer at Fläkt Woods, comments: “Through monitoring performance both before and after the upgrades we can see that the first phase is set to save £19,581 in the first year. This is in addition to savings of £25,912 for the second phase of upgrades, making a combined saving of £45,493 altogether in the first year alone.


“With payback for both phases set to be completed in the next three years, the building will soon be able to cut costs and reap the rewards of a more efficient HVAC system.”

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The estates operations manager, comments: “Thousands of people visit the centre every week, so it’s of the utmost importance that we provide a comfortable and healthy environment for our visitors to enjoy.


“Fläkt Woods provided a great service upgrading the fans, with downtime being kept to a minimum and therefore reducing disruption to our visitors. In addition, the upgrade has made a real impact on our bottom line, with substantial energy savings already being recognised.”

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For more information on the complete range of fans and other air comfort and fire safety products from Fläkt Woods visit www.flaktwoods.co.uk or marketing.uk@flaktwoods.com.  




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