The drive towards zero carbon homes will have an impact on ventilation technologies, according to manufacturers
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Q, will combine to boost the adoption of whole-house mechanical extract ventilation systems (MEV and dMEV) and mechanical extract ventilation systems with heat recovery (MVHR). This changing trend from intermittent fans to
continuous mechanical ventilation poses a potential noise issue in dwellings. However, this has already been addressed by some manufacturers and has led to the development of new, quieter fans that can run continually without disturbing householders. To ensure this, Part F stipulates that the noise from continuous mechanical ventilation systems should be below 35dBA on trickle speed. Meanwhile, for the first time Part F will require post- completion testing of ventilation equipment. The new
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Domestic Ventilation Installation and Commissioning Compliance Guide has been introduced to ensure ventilation not only delivers the required airflow, but also does it efficiently and quietly. The guide includes checklists for declaration of the equipment, its performance, its commissioning, sign-off procedures and paperwork completion to ensure performance and efficiency are met. This completed information must be sent to Building
Control. With the post-completion testing, if ventilation is designed to 5 cu m h/sq m and achieves down to three, then the ventilation will be adequate. Post-installation performance policing is critical to
ensure air quality in increasingly airtight homes. This is especially important with the increased adoption of
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