62 HEATING, VENTILATION & SERVICES


as an indispensable component of energy- effi cient homes. Smart ventilation controls can also provide greater control to the user and ease of commissioning for the installer. Innovations in MHR continue to enhance precision, automation and monitoring, which not only improves the user experience but also contributes to optimised energy usage.


When it comes to MHR, the design of the system is crucial to the overall effi ciency of the building. If a ventilation unit is undersized, it could lead to the under performance of the system, with an air  ow rate that is too low, which can result in high humidity levels in dwellings. It can also mean a unit has to work extra hard in an attempt to achieve air ow rates, resulting in excessive noise and increased energy usage. This is why manufacturers work closely with specifi ers from the design stage to ensure that new homes can meet the requirements for both ventilation and air tightness.


PASSIVHAUS – MEETING THE STANDARD As the Government has strict limits to meet on carbon emissions, housebuilding requirements are set to become even more stringent. The Passivhaus concept is being adopted by many social housing providers and some developers because it sets a


benchmark for achieving energy effi ciency through ventilation and heat recovery. Passivhaus, obviously, presents another dimension in the need for energy-effi cient ventilation systems. Achieving Passivhaus certifi cation requires meticulous attention to detail in terms of insulation, airtightness, ventilation and overall energy performance. MHR fi ts into this framework, providing a comprehensive solution that addresses the requirements of Passivhaus construction. entilation systems must be certifi ed to meet the Passivhaus standard to be part of a Passivhaus build.


LONG TERM BENEFITS


The advantages of MHR extend beyond compliance. Housebuilders with a long-term vision recognise the value of incorporating MHR as standard


in their projects. It can be seen as a strategic investment that enhances the marketability of homes, positioning them as forward-thinking by offering eco-friendly dwellings that meet the growing demand for sustainable living spaces. MHR can also lead to long term benefi ts for homeowners such as lower energy bills, and can potentially lead to an increase in property value.


So MHR becomes a compelling choice on the road to zero carbon. The combined benefi ts of energy effi ciency, good quality indoor air quality and compliance with building regulations, means MHR systems are future-proofed to meet the demands of today and tomorrow. Integrating mechanical ventilation systems in airtight homes, including Passivhaus buildings, presents both challenges and opportunities for the new build market. Effective MHR system design can go a long way to address the potential challenges posed by airtightness. With the benefi t of ventilation systems with heat recovery, airtight buildings can enjoy high levels of indoor air quality, energy effi ciency and reduced carbon emissions over the lifetime of the dwelling.


Ruth MacEachern is product manager at EnviroVent


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