Conventional dehumidification system DESHU XP+

The DESHU XP+ double flow air conditioning system is specially designed for dehumidifying, ventilating, heating and recovering energy from aquatic centres with variable occupancy, such as municipal swimming pools, leisure pools, balneotherapy centres, etc. This air conditioning unit features different equipment which maximize energy savings.



The DESHU XP+ is covered by a 20-year anti-corrosion guarantee

The ventilation, air conditioning and dehumidification solution DESHU XP+ provides optimum air quality for high humidity environments. This double flow air handling unit is delivered ready to operate. The design of our heat pumps and the selection of the components used guarantee a high degree of reliability. Thanks to its full aluminium structure (frame & casing), the DESHU XP+ unit is covered by a 20-year anti-corrosion guarantee.

The DESHU XP+ double flow air conditioning and dehumidification unit operates as a reversible heat pump:

  • Source: inside air
  • Treated fluid: Internal air + Hygienic air

Dehumidification is ensured by the heat pump cooling cycle coupled with a heat pipe. The heat pipe recovers heat without external energy supply. This allows significant energy savings and compressors’ size reduction by 30 to 50%, which results in lower electricity consumption. Exhaust air is dried up firstly through a precooling process on the heat pipe and then through a final cooling on the evaporator. Calories are then transferred to the supply air side, firstly to the other part of the heatpipe and secondly to the air condenser, to heat the dehumidified air. Supply air temperature at the condenser outlet is higher than air temperature at the unit inlet because of latent heat recovery and energy supplied by the compressors.


The unit offers several operating modes:

  • Dehumidification through fresh air modulation without thermodynamics
  • Thermodynamic dehumidification with heat recovery on the air-cooled condenser
  • Thermodynamic dehumidification with heat recovery on the water-cooled condenser (if option selected)
  • Thermodynamic cooling with a reversible heat pump (if option selected)
  • Thermodynamic cooling mode with heat recovery on auxiliary water-cooled condenser (if option selected)

The ETT packaged unit comprises 3 different sections:

  1. The exhaust air section ensures dehumidification and energy recovery
  2. The separate technical section houses the refrigeration components, the electrical board and the control components.
  3. The supply air section ensures air change and room air treatment.

Available options

Frame – Casing

  • Motorised external supply air register (CH 38 – 2006/42/EC Directive)
  • Packaged or 3-block unit


  • Acoustic insulation of the technical compartment with STOPFLAM foam
  • Acoustic insulation of the fresh air cowl
  • Compressors acoustic jackets


  • High performance plug fans with H2S protective coating
  • High fl ow fans
  • Pressure gauge per fi ltration cell
  • Filters fouling analogue control (FFAC)
  • Actuating smoke detector with battery back-up
  • ISO ePM10 50% (M5), ISO ePM1 50% (F7) or ISO ePM1 80% (F9) opacimetric fi lters
    98 mm thick
  • ISO ePM1 80% (F9) polydihedral opacimetric fi lters in polypropylene 292 mm thick for
    supply air only


  • HP and LP pressure gauges
  • Electronic expansion valves
  • Cooling with reverse cycle

Thermal exchangers

  • 3-stage electric heater
  • Triac
  • Hot water coil with analogue anti-freeze thermostat
  • 3-way progressive valve mounted on hot water coil
  • Pre-assembled shut-off valve + balancing valve

Electricity and communication

  • Unit global energy metering
  • Phase checker
  • Humidity sensor on fresh air with comparison of specifi c humidity (recommended with cooling by cycle inversion)
  • Software licence for BacNet IP protocol
  • IT earthing system compatibility
  • ETT Control box Remote touch display
  • MyETTvision remote communication platform


  • Aluminium feet 200, 400 or 600 mm


  • 316 L stainless steel insulated water condenser with 3-way valve and self-resetting water flow controller (only during chlorine water treatment)
  • CPVC stop valve on water-cooled condenser

Thalassotherapy and spa option

  • Heat pipe with heresite coating
  • Hot water coil with heresite coating
  • Thermodynamic coils with heresite coating
  • Double coating of pipes
  • Aluminium salt fi lters on return
  • Titanium insulated water condenser with 3-way refrigerant valve and self-resetting water flow controller
  • Fine fi lters (ISO ePM1 50% (F7) or ISO ePM1 80% (F9)) for return and supply air

Download the brochure

Application leaflet

Application leaflet