Heat recovery unit with counter-flow plate heat exchanger

Designed for detached houses, multi-dwelling houses and holiday cottages less than 200 m2. Also suitable for renovation projects. The unit's maximum air flow is 100 l/s with a temperature efficiency for the heat exchanger of over 80 %. W4 is a very low model, whose height is only 493 mm. The unit returns no odours and no moisture to the home and is therefore especially suited to objects where there is a lot of moisture

  • Maximum airflow 100 l/s
  • Temperature efficiency of the heat exchanger is up to 82 % (EN 308)
  • Annual efficiency up to 73 %
  • Advanced Smart control technology
  • The ventilation is controlled automatically by the need
  • Automatic summer function and passive cooling
  • The defrost function ensures continuous ventilation
  • External units for heating and cooling are available
  • Can be connect to the automated building management system
  • Lowest design available on the market (below 500 mm)
  • Can be used with Smart controls or Swegon CASA kitchen hoods.

You can use the external connection card (SET) in the CASA W4 Smart ventilation unit. This makes the connection of external accessories, such as the duct mounted air heater, much easier. In addition, there is a separate, internal power switch in the ventilation unit, so that you can easily disconnect the power to the ventilation unit.

Smart functions

The new Smart panel makes adjusting your ventilation to changing circumstances easier than ever. You can change functions manually from the color user panel, use the weekly 24h timer to change the modes according to your wishes or you can let the Smart-logic take care of it for you automatically (accessory). Compatible with all Smart units. 

Smart funktioner

Counter-flow plate heat exchanger    

Thin aluminium plates arranged cross-wise to form parallel air passages. Temperature efficiency between 80-90%.

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Swegon CASA W4 Smart
Swegon CASA W4 Smart
Inside view

Ecodesign energy label
Ecodesign energy label
Energy class may vary depending on the equ…




System drawings (DXF)
Download system drawings for the CASA series of air handling units for use in projects.

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Article Name Type Size Date Add to bucket
Page < 1 >
CASA Smart  Declaration of Conformity Declarations 2.43MB 11/19/2018 Add to bucket
CASA Smart  Smart functions Brochures 3.83MB 6/21/2016 Add to bucket
CASA Smart  Warranty Conditions Other 86.66kB 6/20/2018 Add to bucket
CASA Smart, Premiun & ILVA  Ecodesign Lot 6 Product Fiche Other 118.41kB 2/20/2017 Add to bucket
CASA ventilation units  Overview Brochures 3.96MB 12/13/2016 Add to bucket
CASA W3/W4 Smart  Dis-assembly instructions Other 993.98kB 12/31/2015 Add to bucket
CASA W4 Smart  Ecodesign Other 465.56kB 2/20/2017 Add to bucket
CASA W4 Smart  Sales brochure Catalogue/Product sheets 861.88kB 11/14/2017 Add to bucket
CASA W4 Smart 11/2017-  Installation, commissioning and maintenance instruction Instructions/Manuals 4.09MB 2/8/2019 Add to bucket
CASA W4 Smart Econo  Ecodesign Other 464.90kB 2/20/2017 Add to bucket
CASA W-series  Instructions for Use Instructions/Manuals 8.88MB 3/1/2019 Add to bucket
Smart  Smart connection Other 91.70kB 3/29/2017 Add to bucket