Page 56 - Toucan_Modules_EN

A holistic HVAC strategy relies on an integrated approach to:
A h o l i s t i c H V A C s t r a t e g y r e l i e s o n a n
· reduce demand,
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· optimise existing systems,
upgrade to more efficient systems.
· u p g r a d e t o m o r e e f f i c i e n t s y s t e m s
Reduce demand
M e t h o d s t o r e d u c e d e m a n d f o r H V A C s e r v i c e s i n c l u d e :
Methods to reduce demand for HVAC services include:
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· i improved building insulation,
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· high performance window glazing,
· natural ventilation,
external window shading,
· e x t e r n a l w i n d o w s h a d i n g
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· colour and reflectivity of external materials,
· green roofs,
· cool roofs.
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Painting roofs white or with special reflective coatings to create ‘cool roofs’ can
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significantly reduce air-conditioning loads. This is especially so in hotter inland climates
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a n d f o r l a r g e , f l a t b u i l d i n g s l i k e f a c t o r i e s a n d w a r e h o u s e s .
and for large, flat buildings like factories and warehouses.
Optimise
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While significant energy and capital savings can be made through investing in new,
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W W h i i l l e s s i i g n i i f f i i c a n t t e n e r r g y a n d c a p i i t t a l l s s a v i i n g s s c a n b e m a d e t t h r r o u g h i i n v e s s t t i i n g i i n n e w , ,
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high-efficiency HVAC systems, existing systems can also be optimised.
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Many factors that influence the comfort of building occupants can be measured and
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Some recommended practices are:

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adjusting thermostat set points,
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minor mechanical repairs.
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Optimisation can also involve a ‘night purge’ that reduces mechanical cooling by
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automatically flushing a building with cool night air using natural ventilation. This
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reduces HVAC operating hours and plant load.
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U U p g r r a d i i n g t t o a m o r r e e f f f f i i c i i e n t t H V A C s s y s s t t e m c a n d e l l i i v e r r s s i i g n i i f f i i c a n t t e n e r r g y s s a v i i n g s s o v e r r
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Upgrading to a more efficient HVAC system can deliver significant energy savings over
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its 20-25 year lifespan. Due to technological advances, there are many more efficient
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At the point of upgrade, assess opportunities to improve performance across the entire assess opportunities to improve performance across the entire assess opportunities to improve performance across the entire
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performance is determined by the features of all 3 sub-systems and their integration.
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