• extremely low noise levels
• up to 95 litre/sec at 50Pa - max 101 litre/sec capacity
• sfp down to 0.50 W/l/s
• summer bypass which allows the two airflows to bypass the heat exchanger automatically when internal and external temperatures are between adjustable setpoints.
• frost-stat - proportionally reduces intake motor speed as temperature falls - activated when the outside temperature between +80C and -30C.
• run-time and power outage counters
• easy to install and maintain
• easy to access G3 filters
• universal handing for models without humidistat - left or right
• for fitting vertically into lofts, or cupboards - wall fixing bracket supplied
• variable low (trickle), boost and purge options for each motor
• boost speed can be activated by a 230V switched live, or a 0-10V connection from:
  • a light switch (if more than one light switch is used, each one must be a double pole switch)
  • Remote humidistat (230V - DRH240)
  • Passive infra red (230V - PIRFF)
  • Thermostat (230V - THM)
  • Remote switch/pull cord - 230V
• low running costs
• 5 year warranty - 1 year parts and labour, 4 years parts only

CONTROL FEATURES - STANDARD

• independent variable speed adjustment for each motor for trickle, boost and purge speeds.
• adjustable boost speed over-run timer from 0 to 30 minutes.
• adjustable boost speed delay from 0 to 5 minutes.
• remote purge cable connection on circuit board (for optional purge facility)
• adjustable night time boost and purge inhibitor.
• integral frost-stat - proportionally reduces intake motor speed as temperature falls
• automatic summer bypass

CONTROL FEATURES - FACTORY SET

• change of ductwork handing on humidistat version (trip point can be set at manufacture)
• integral humidistat - proportionally increases motor speeds with rising humidity
• 0-10V connections can be added for:
  • BMS - for remote motor shut-off
  • CO2 detector
  • home automation system
• relay for external pre-heater
• 3 speed selector switch
• optional remote purge cable - factory connected - adjustable over-run timer from 0 to 250 minutes, Pre-set to 15 minutes (adjustable at factory)
• holiday mode for reduced speeds when property is unoccupied (factory set option)
• run-time and power outage counters downloadable via QR code

• compact unit - casing from steel sheet - epoxy paint finish
• lined with Class "O: fire resistant acoustic foam
• low energy EC brushless motor with single width, single inlet, direct drive, forward curved impellors
• operates in temperature up to 60ºC
• easy to access standard, disposable G3 filters
• counter flow heat exchanger

• Building Regulations for enhanced energy saving capability
• Building Regulations for reliable, efficient ventilation
• EU RoHS Directive Compliant.
• Complies with IEC60335-2-80, LVD2006/95/CE and EMC2014/30/UE (European Directive against radio interference and electro-magnetic compatibility
• manufactured in UK to ISO 9001:2015 and 14001:2015
• CE marked
• SAP PCDB Listed

• Midi BY-AT - bypass, attenuation, universal, integral LCD
• Midi BYATH/LH - bypass, attenuation, humidistat, left drain, integral LCD
• Midi BYATH/RH - bypass, attenuation, humidistat, right drain, integral LCD

• MIDI-AT-F - set of filters for above models

• The unit will:
  • be manufactured by Vectaire Ltd.
  • be constructed from steel sheet with an epoxy paint finish and the case lined and insulated with Class "O" fire resistant acoustic foam to ensure extremely low noise levels.
  • be suitable for installation on walls, in cupboards or in lofts.
  • have a condensate tray and drain connections for connection by others.
  • have a high efficiency counterflow heat exchanger with a thermal efficiency of up to 94%
  • have two low energy, high efficiency EC fan motor assemblies.
  • have a specific fan power from 0.50 W/l/s.
  • have two G3 grade filters to protect the heat exchanger
  • will operate in temperature up to 60ºC
  • have an automatic summer bypass
  • have an integral frost-stat
• Units without humidistats shall be capable of being handed for left or right mounting without any on-site assembly.
• Access to filters shall be from the front by removing two magnetic strips.
• The unit shall incorporate the following control features:

STANDARD

• • independent variable speed adjustment for each motor for trickle, boost and purge speeds.
  • adjustable boost speed over-run timer from 0 to 30 minutes.
  • adjustable boost speed delay from 0 to 5 minutes
  • remote purge cable connection on circuit board (for optional purge facility)
  • adjustable night time boost and purge inhibitor
  • integral frost-stat - proportionally reduces intake motor speed as temperature falls
  • summer bypass - automatic bypass of heat exchanger in hot weather

FACTORY SET

• • change of ductwork handing on humidistat version (trip point can be set at manufacture)
  • integral humidistat - proportionally increases motor speeds with rising humidity
  • 0-10V connections can be added for:
  • BMS - for remote motor shut-off
  • CO2 detector
  • home automation system
  • external pre-heater
  • 3 speed selector switch
  • optional remote purge cable - factory connected - adjustable over-run timer from 0 to 250 minutes. Pre-set to 15 minutes (adjustable at factory)
  • holiday mode for reduced speeds when property is unoccupied (factory set option)
  • run-time and power outage counters downloadable via QR code.

• LCD touch screen informs user of:
  • operating speed (user adjustable)
  • internal and external temperatures
  • status icons shows which functions currently controlling fan speed
  • date and time (user adjustable)
  • relative humidity level
  • bypass status
  • error and service notifications
  • filter saturation level (reset after changing)
  • user can also set system to holiday mode and set language
• (Loft mounted units can be provided with a remote LCD touch screen).

• The LCD touch screen will allow the commissioning engineer or installer to set the following parameters:
  • Time and Date
  • Holiday Mode
  • Trickle, boost and purge speeds for each motor
  • Boost speed delay time duration
  • Boost over-run time duration
  • Night time boost inhibitor times
  • Touch screen sensitivity calibration
  • Pre-heater threshold (if fitted)
  • Handed installations
  • Activate CO2 detector or home automation system (if fitted)

• The unit will:
  • be CE marked
  • comply with:
  • manufactured in UK to ISO 9001:2015 and 14001:2015
  • be SAP PCDB Listed
  • have a 5 year warranty -1 year parts and labour and 4 years parts only
• Building Regulations for enhanced energy saving capability
• Building Regulations for reliable, efficient ventilation
• EU RoHS Directive Compliant
• IEC60335-2-80, LVD2006/95/CE and EMC2014/30/UE (European Directive against radio interference and electro-magnetic compatibility