Multi point extract & products

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Multi Point and Individual Room Extraction

Why MEV?

Today’s modern apartment buildings offer challenges to the ventilation system designer. Limiting noise ingress, wind effects, aesthetics and installation limitations have to be taken into account in addition to regulatory compliance and cost. MEV has less dependency on background ventilators, requires only a single discharge grille for a whole apartment and very often has smaller, easier to install ducts than systems designed around intermittent operating extract fans and background vents. Such benefits make MEV an increasingly popular method of providing adequate ventilation in such homes.

How does it work?

Essentially the concept is to provide simultaneous, low level extraction from Kitchens, Bathrooms, Shower rooms, Utility rooms and WC’s to a central extract fan via a system of ductwork and grilles. The extracted air is then normally discharged to outside via a single duct and grille/cowl. Current Building regulation guidance, in the form of BRE Digest 398, requires such systems be designed to provide background extraction at a rate equating to approximately 0.5 air changes per hour based on the whole dwelling volume with the ability to boost by 25-50% for times when increased ventilation is required e.g. during cooking. Replacement air is normally able to be provided via structural air leakage with background ventilation openings like trickle vents not normally needed unless the home is built to extraordinarily airtight standards. This can be best demonstrated by referring to the table below which shows the very small building fabric air resistance an MEV system on boosted extraction would have to overcome in apartments of different levels of air-tightness. As this type of system has to work 24 hours a day, 7 days a week, 365 days a year, low noise levels and reliability are critical.

Multi-point Extract Design Factors:

  • Unobtrusive
  • Low running costs
  • Single unit
  • Effective continuous ventilation throughout the dwelling
  • Only one breach of external building costs
  • Can be specified to suit needs of each property
  • Installed close to moisture source

Products:

MEVDC:

  • Low depth, high performance: Only 190mm deep & up to 115l/s.
  • Meets Regulations: MEVDC-ES is SAP appendix Q rated (refer to www.bre.co.uk).
  • Most efficient: Latest DC motors provide high performance with low SFP within their respective class.
  • Quietest solution: Advanced motor and impeller technology with acoustic lined options provide one of the quietest options available.
  • Quick installation: Unique locating bracket enables the units to be fixed in any plane, quickly and efficiently at either 1st fix or 2nd fix stage.
  • Easy commissioning: Ecosmart ‘dial a duty’ option allows for infinitely variable speed selection allowing for exact design selection.
  • Easy maintenance: Easy to access for optional filters for quick and easy maintenance.
  • Flexible solution: Unit can be fixed horizontally or vertically.
  • Warranty: 5 year warranty.

MEVAC:

  • Low depth, high performance: Only 190mm deep & up to 95l/s.
  • Most efficient: Latest AC motors provide high performance with low SFP within their respective class.
  • Quietest solution: Advanced motor and impeller technology with acoustic lined options provide one of the quietest options available.
  • Quick installation: Unique locating bracket enables the units to be fixed in any plane, quickly and efficiently at either 1st fix or 2nd fix stage.
  • Additional options: Run on timer, humidistat, G2 filter together with a range of round and rectangular spigot and damper kits.
  • Easy maintenance: Easy to access for optional filters for quick and easy maintenance.
  • Flexible solution: Unit can be fixed horizontally or vertically.
  • Warranty: 5 year warranty.

MEVDC-SVS:

  • Quietest system: The quietest fans available mean low noise throughout.
  • Guaranteed ventilation: Fresh, filtered air provided without the need of trickle vents* or open able windows.
  • Reduced traffic noise: Specially designed attenuators reducing external noise into the dwelling to acceptable levels**
  • Low power consumption: Advanced impeller & motor technology means high performance with low energy use.
  • Improved air tightness: Only 2 penetrations of building fabric per apartment required.
  • Space saving design: The shallowest, most compact unit means low impact, easy installation.
  • Easy Commissioning: Simple to use speed control and integrating balancing dampers means that your system is quickly and efficiently commissioned and balanced.
  • Zone B, C & D classified land: Optional attenuators & carbon filtration*** help toward planning approval.
  • Warranty: 5 year warranty

*Nuaire will assess the requirements of the property to establish if additional passive ventilation measures are required.
**Subject to approval by acoustic analysis.
***Please contact the Nuaire Applications (02920858200)

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