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flexoTHERM 400V 5, 8, 11, 15 and 19kW

Air source adaptation

  • Exceptionally quiet with noise levels as low as a modern refrigerator - 42dB(A), flexoTHERM has earned the ‘Quiet Mark’ approval
  • Compatible with the Vaillant wired VRC 700 and wireless VRC 700f controls, to provide optimum system efficiency and a system rating of ErP A+++
  • Built-in heating circulation pump and a three-way diverter valve
  • Green iQ technology aids in future-proofing the product and ensures optimum efficiency, performance and sustainability


The aroCOLLECT accessory is an air source brine collector module which acts as an alternative to ground source and is compatible with 400V flexoTHERM models. aroCOLLECT is a three-phase air collector that uses the air temperature outside to warm the brine fluid for the heating system. This high-efficiency air-to-water heat exchanger ensures there is no heat loss between the outside and indoors which also operates with an extremely low noise level of 39.8dB(A) (400V, 5kW) allowing the product to be approved by ‘Quiet Mark’.

aroCOLLECT features modulating ventilators and a twin unit connection using balanced Tichelmann piping, reverse return system and is ideal for outdoor use in agricultural, commercial and residential projects.



Technical dataUnit5kW 400V8kW 400V11kW 400V15kW 400V19kW 400V
Heat source module 1 x VWL 11/4 SA1 x VWL 11/4 SA1 x VWL 11/4 SA2 x VWL 11/4 SA2 x VWL 11/4 SA
Brine fluid type Ethylene glycol 44% volumeEthylene glycol 44% volumeEthylene glycol 44% volumeEthylene glycol 44% volumeEthylene glycol 44% volume
Minimum flow temperature heating°C2525252525
Maximum flow temperature heating with compressor°C6565656565
Nominal flow rate ∆T 8K l/h6601020135017202300
Energy-related Products at 35°C*BandA+++A+++A+++A+++A+++
Energy-related Products at 55°C*BandA+++A+++A+++A+++A+++
Product dimensions (H x D x W)mm1185 x 595 x 6001185 x 595 x 6001185 x 595 x 6001185 x 595 x 6001185 x 595 x 600
Weight, ready for operationkg151167175187200

*Reported efficiency when used with VRC 700 / VRC700f controller

Related Products

Related Products

VRC 700 and VRC 700f

Wired and wireless system controls for single and cascade installations

  • Takes care of all Vaillant equipment automatically by intelligently communicating with all Vaillant appliances
  • Flexible time programs
  • Clear, high contrast backlit display
  • Programs are permanantly stored


Alternative products

Alternative products

aroTHERM 5kW, 8kW, 11kW and 15kW

Air-to-water heat pump

  • Blue fin coated evaporator as standard
  • MCS accredited
  • ErP rated A++
  • "Quiet Mark" accredited