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Modular air handling unit with heat recovery AHU ROT

Modern building become more and more tighten insulated. This makes the mechanical ventilation obligatory, in order to ensure health and comfort of the inhabitants.

Traditionally, ventilation and air-conditioning equipment are the biggest energy consumers in buildings. This fact impose the use of heat recovery equipment that could reduce the running costs significantly. Depending of the type of recovery, those units have efficiency up to 80%. The need of additional heating and cooling is reduced and that is of high economical and environmental importance.

Heat recovery ventilation is exceptionally profitable investment and has a payback period of approximately 1-3 years, depending on the running hours of the system and regional climate.

TANGRA company has rich experiance in the design and production of HVAC units and systems. Production, Research and Development Department and HVAC Laboratory are situated at more than 8000sq.m. Well educated prefessionals are responsible to satisfy every specific HVAC need. Machines with extremely high precision and efficiency assure the high quality of the production.

Air handling units are used in the following ventilation and air-conditioning installations:

     Residential and office buildings


    Trade centers

    Super- and hypermarkets

    Agricultural and industrial projects

     Certified by TÜV Rheinland 

TANGRA AHU-ROTis produced in 6 standard models for air volumes between 2500 and 25000 m3/h. It is possible to be produced units with different dimensions and bigger air volumes on request.
Supporting construction of AHU-REC consists of special aluminium profiles and corners. Side panels are made of galvanized metal sheets with powder coating and thermal- and sound insulation. The panel thickness is 25 mm or 50 mm depending on the typesize of the unit and its place of installation (indoor or outdoor). Service and maintenanve covers are designed as doors or as removable panels with reamers.

The typical configuration of AHU-ROT includes the following sections:

    Filter section with different class of filtration
    Regenerative rotary heat exchanger with efficiency up to 83%
    By-pass with motorized damper
    Mixing section with multiple leaf dampers
    Thermal section with heating and/or cooling coils
    Supply fan
    Exhaust fan
    Sound attenuation section
    Control and automation system


  • Schools and Universities
  • Car showroom and parks
  • Offices
  • Hotels
  • Public buildings
  • Retail
  • Green buildings
  • Elements

  • Energy saving
  • Economical
  • Type

  • Heat recovery
  • Heating/Cooling
  • Humidifying/Dehumidifying
  • Modular air handling unit with heat recovery AHU REC

    AHU-REC is a range of modular air handling units with incorporated air-to-air cross-flow heat exchangers REC-AL (efficiency up to 55%) or REC-AL+ (efficiency up to 65%).

    TANGRA AHU-REC series has got a wide range of applications. Designed for indoor or outdoor installation, these machines can treat air volumes between 2500 and 25000 m3/h as a standard.

    Modifications on request of the customesr are also posiible.

    Modular air handling unit single deck AHU SD

    Tangra modular air handling units AHU-SD are designed on sectional principe, which makes their assembly, installation, transportation and maintenance very easy.

    AHU-SD units can be installed indoor aor outdoor and have wide range of applications.

    The series treat air volumes between 2500 and 49000 m3/h.