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  • MICRA 150MICRA 150 new series

    MICRA 150 is a single-room heat recovery unit. It is designed to provide the ideal single-room ventilation of social and commercial premises, flats and cottages. MICRA 150 is the most suitable solution for arrangement of ready-made and refurbished premises. It  has easy mounting without air ducts.

  • VK...U seriesVK...U series new series *

    The VENTS VK...U fans offer high performance ventilation in medium to high demand systems. Maximum capacity - 871 CFM.

MICRA 150  new series


MICRA 150 is a single-room heat recovery unit. It is designed to provide the ideal single-room ventilation of social and commercial premises, flats and cottages. MICRA 150 is the most suitable solution for arrangement of ready-made and refurbished premises. It  has easy mounting without air ducts.

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Products in this series (1)

  • MICRA 150

    MICRA 150

  • MICRA 150

    MICRA 150

    Maximum capacity - 71 CFM


  • Efficient supply and exhaust ventilation of separate premises (rooms)
  • Polystyrene plate counter-flow core with sensible recovery efficiency 85-88%
  • EC fans with low energy demand (8 to 51 W)
  • Integrated automation with 3 operation modes (up to 71 CFM)
  • Silent operation (1-1.8 Sones)
  • Air cleaning with two built-in filters
  • Easy mounting
  • Compact sizes



Metal polymer coated casing. 3/8" foamed synthetic rubber layer provides heat- and sound-insulation. The modern unit design let it match well with any interior type. The front panel is easily opened for the unit servicing (e.g. for filter cleaning or replacement) and fitted with a protecting opening switch that cuts power supply off if the panel is opened. Air is supplied to the unit and exhausted from the premise through two Ø5" air ducts.

Air filtration

Supply air flow is cleaned with built-in MERV 7 filter, and exhaust flow is cleaned with built-in MERV 5 filter.

The filters serve to provide supply of fresh air free of dust and prevent the unit components from soiling.

Air supply and exhaust

High-efficient EC motors with external rotor and forward curved blades are designed for air supply and exhaust. The fan motors have built-in overheating protection and ball bearings for longer service life. Due to EC technologies Micra 150 is featured with low energy demand and reliable operation.

Features condensate drain pan

Some condensate that may be generated during heat recovery process is collected in a special drain pan. As the drain pan is filled with condensate, the unit switches automatically off which is confirmed by indication on the control panel. Remove condensate from the drain pan and restart the unit to continue the unit operation.

Operating logic

The intake air from outside flows through the filter and the heat recovery core and is supplied to the room with the supply centrifugal fan. Warm stale air from the room flows through the filter and the heat exchanger and is exhausted outside through the wall by the exhaust centrifugal fan. In the heat exchanger heat energy of warm extract air from the room is transferred to clean cold air flow from outside. Heat exchange results in minimization of heat losses and lower heating costs. The extract and supply air flows are fully separated, so no contaminations, odours and microbes come to supply air flow.

Heat exchanger

The unit incorporates a high-tech plate counter-flow polystyrene heat recovery core with heat exchange efficiency 85-88%. In winter period the heat exchanger utilizes heat energy of extract air to warm up intake air and decrease the operating load on the heating system. In summer period supply air is cooled down by colder intake air.

Freezing protection

The single-room heat recovery unit MICRA 150 is equipped with a built-in freezing protection. During heat recovery in cold season thermal energy of warm extract energy is transferred to cold intake air. The electronic freeze protection is applied to prevent condensate freezing during cold outside temperatures. If exhaust air temperature at outlet of the core drops down below the set point, the supply fan is stopped. Warm extract air heats the core up and the exhaust air temperature at outlet of the core rises. After that the supply fan is turned on and the unit reverts to the previous operation mode.

Control and operation modes

The unit is equipped with a control panel. The delivery set includes a remote control panel. The control system supports the following 3 operation modes:

  • 1 speed – air capacity 35 CFM;
  • 2 speed – air capacity 53 CFM;
  • 3 speed – air capacity 71 CFM.

The following functions are available:

  • High speed activation timer adjustable from 20 to 60 minutes;
  • Fan speed adjustment;
  • Week-scheduled operation;
  • Filter replacement and alarm indication.

MICRA 150 ventilation system arrangement example

Install one or several MICRA 150 unit in each premise to be ventilated. One unit is capable to provide efficient ventilation of up to 1200 sq. feets. Ventilation system based on the single room heat recovery unit with heat recovery MICRA 150 provides permanent air exchange in a premise, saves heat in winter and cold in summer.

The heat recomvery unit MICRA 150 is mounted on a face wall from inside. The wall thickness must be no less than 4". First mark the holes for the air ducts with a cardboard master plate included into the delivery set. Drill the holes and fix the cardboard master plate to the wall with dowels and screws.

Insert the air ducts into the holes. Use the cardboard master plate to fix the air ducts in a required position and to align the pipes and the air ducts. Mount a double metal hood on outer wall side to protect the unit from water ingress and outer objects. After positioning of the air ducts between the outer hood and the metal plate fill the gaps between the air ducts and the wall with a mounting foam through special slots in the metal plate. After foam hardens remove the cardboard master plate and cut protruding parts of the air ducts to be flush with wall surfaces. For mounting of the unit casing open the decorative panel and remove the core. While mounting the unit direct the branch pipes to the plastic air ducts and fix it to the wall with dowels and screws. The unit is supplied with a pre-wired power cable and a socket. The unit may be connected to the fixed wiring system through terminal leads. For doing that disconnect the power cable from the terminal box and connect the leaded outside power cables. After completing the casing mounting and wireworks reinstall the core and close the front panel. The unit is ready for operation.


Mounting kit MK MICRA 150:

  • two plastic air ducts (Ø5", 19 11/16");
  • double outer metal hood.


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