74 HEATING, VENTILATION & SERVICES


THE CORRECT CHOICE OF HVAC SYSTEMS CAN SATISFY BOTH ENERGY EFFICIENCY AND IAQ REQUIREMENTS


situated on the home’s exterior. he placement of these intakes is vital, and they should always be situated as far away as possible from sources of air pollution such as road traffi c or exhaust  ues from the home. he fi ltration system is another vital


use this heated air to help generate hot water for the home.


When grading heat recovery systems, manufacturers usually state easonal nergy ffi ciency ating  fi gures of 3 and 4; however, it isn’t unrealistic for this score to almost double when recov- ered energy is utilised through the A


system. A good option here is to use entralised eat ecovery entilation  systems.


FURTHER CONSIDERATIONS A crucial consideration for designing an A system is the location of the ventilation intakes and exhaust outlets


aspect of effective ventilation in the home. A units are fi tted with fi lters primarily to keep the systems dust and debris free to allow for optimal energy effi ciency. owever, opting for indoor units that fea- ture automatic cleaning fi lters will ensure that the IAQ is positively affected, along with the energy-saving aspects. By taking a whole-building approach


to A in new build homes, and considering the above, such systems can easily protect indoor air quality, while maintaining energy effi ciency, in tandem.


Stephan Lang is product specialist at Daikin


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