Double flow heat pump: EFFI+ RE

The EFFI+ RE double flow heat pump is specially designed for ventilation, heating and air conditioning in buildings with variable occupancy, such as cinemas, entertainment halls and community halls. This self-contained unit features specific components to maximise energy savings.

As an ErP 2018 ready unit, the EFFI+ RE meets the European regulatory obligations as per Directive 2009/125/EC on the ecodesign of ErPs (Energy related Products).


Double flow rooftop heat pump & air conditioner with rotary heat exchanger covered by a 20-year anti-corrosion guarantee

The ETT packaged unit is delivered ready to operate. Its full aluminium structure (frame & casing) ensures an excellent corrosion protection (20-year anti-corrosion guarantee).

The ETT unit can be installed either at ground level or on a roof. ECODESIGN involves DECONSTRUCTION: ETT units are 98% recyclable (re-use and recycling rates based on ULTI+ 21)

The EFFI+ RE heat pump with heat exchanger operates as a reversible heat pump:

  • Source: outside air + exhaust air (in recovery mode)
  • Treated fluid: outside air + hygienic fresh air

The unit offers several operating modes:

  • Heat pump
  • Cooling
  • Free Cooling: cooling with outside air, without thermodynamics
  • Recirculation

The EFFI+ RE offers several operating modes:

Legend key

The ETT packaged unit comprises 4 different sections:

  1. The separate technical section houses the refrigeration components, the electrical board and the control components.
  2. The internal section ensures air change and air treatment.
  3. The exhaust air section allows heat recovery and/or removal on exhaust air (depending on the operating mode).
  4. The rotary heat exchanger section allows heat recovery.


Available options

Frame – Casing

  • Motorised external damper on supply air (2006/42/EC Directive)
  • Painting
  • Delivery in three blocks (sheet metal work assembly, refrigeration assembly and electrical connection shall be done by the customer)
  • Whistle shaped cowl for fresh air and exhaust air


  • Technical section acoustic insulation using STOPFLAM flexible fire-proof polyurethane foam
  • Fresh air cowl acoustic insulation
  • Acoustic option

Air handling

  • Pressure gauge at each filtration stage
  • Analogue air flow controller (AFC), air flow rate indication and measurement
  • Filters fouling analogue control (FFAC)
  • Actuating smoke detector with battery back-up
  • Epoxy coating on fans & vinyl coating on exchangers
  • Supply air fan max. available pressure: 600 Pa
  • Exhaust air fan max. available pressure: 400 Pa
  • Operation with all recirculated air or all fresh air (not available for public access buildings)
  • G4 refillable filters
  • 1 set of spare 98 mm G4 filters
  • 98 mm F6 to F9 opacimetric filters


  • HP and LP pressure gauges
  • Electronic expansion valves

Thermal exchangers

  • Sequential electric heater (auxiliary: 2 stages/preheating: 3 stages)
  • Triac
  • 2-row hot water coil with vinyl coating and analogue frost thermostat
  • Mounted progressive 3-way valve hot water
  • Mounted stop valve + TA regulating valve on inlet


  • Adjustable aluminium ventilated roof curb
  • Adjustable aluminium connection roof curb
  • 200 or 400 mm aluminium feet


  • Unit global energy metering


  • Banning of Free Cooling using specific humidity comparison
  • Humidity probe (for external humidifier control)


  • Epoxy protection on rotary heat exchanger
  • Humidity probe (for external humidifier control)

Download the brochure

Commercial brochure

Commercial brochure