Our website uses cookies to help provide you with the best experience tailored to your interests. To use the website with full comfort, please accept to receive all cookies on our website. For more information with regard to Cookies please see our Privacy policy.

Accept Decline

fluoCOLLECT water-to-water stainless steel heat exchanger

Provides water source adaptation for the flexoTHERM heat pump

  • Enables flexoTHERM to work as a water source heat pump
  • Highly efficient and quiet during operation
  • Ideal for aesthetically sensitive projects
Request a quote


The fluoCOLLECT water-to-water stainless steel heat exchanger connects to a flexoTHERM heat pump to offer an alternative to ground source.

Water source heat pump systems are ideal for end users that have a suitable water source onsite, such as a lake, river or stream. Using a fluoCOLLECT alongside a flexoTHERM enables end users to take advantage of consistent water temperatures, to produce consistent hot water and heating, even in the coldest of temperatures. With the water source system pipework being submerged, it is also a viable option for projects that are especially aesthetically sensitive and require minimal visual impact, during installation and once completed.

Highly efficient with quiet operation, the flexoTHERM and fluoCOLLECT is a simple to install option for suitable projects.

Features and benefits:

  • Provides water source adaptation for flexoTHERM heat pumps - Enables a highly efficient and quiet water source heat pump solution.
  • Flexibility for suitable projects - Ideal for end users that have a suitable water source on-site, such as a lake, river or stream.
  • Suitable for projects that are aesthetically sensitive - The water source system pipework is submerged so provides minimal visual impact, during installation and once completed.



flexoTHERM with fluoCOLLECTUnit5kW
230 V
230 V
230 V
400 V
400 V
400 V
400 V
400 V
fluoCOLLECT module VWW 11/4 SIVWW 19/4 SI
Heating output W10/W35 ΔT 5KkW5.909.9013.106.409.8812.8416.5722.93
Power consumption W10/W35 ΔT 5KkW1.302.002.701.401.912.503.094.44
Output figure W10/W35 ΔT 5K / coefficient of performance EN 14511 4.604.804.704.805.175.145.365.16
Heating output W10/W45 ΔT 8KkW6.509.9013.406.159.9712.7916.3623.47
Power consumption W10/W45 ΔT 8K kW1.702.603.401.672.453.233.925.70
Output figure W10/W45 ΔT 8K / coefficient of performance EN 14511 4.003.803.903.684.073.964.174.12
Heating output W10/W55 ΔT 8K kW6.6010.3013.806.1910.2213.1616.9223.59
Power consumption W10/W55 ΔT 8K kW2.
Output figure W10/W55 ΔT 8K / coefficient of performance EN 14511 3.303.303.402.953.453.333.553.51
Sound power level W10/W35
EN 12102/EN 14511 LWI in heating mode
db(A) 43.346.950.041.247.945.049.950.6
SCoP Performance table
Water source (with fluoCOLLECT) 35˚C 4.945.
Water source (with fluoCOLLECT) 40˚C 4.414.604.634.615.004.975.204.97
Water source (with fluoCOLLECT) 45˚C
Water source (with fluoCOLLECT) 50˚C 3.873.984.033.824.264.194.424.27
Water source (with fluoCOLLECT) 55˚C 3.873.954.023.624.124.024.344.23

Related Products

Related Products

flexoTHERM water source heat pump

  • MCS accredited and Quiet Mark approved*
  • Ideal for properties that have an accessible water source on-site
  • ErP rated A+++ when installed with VRC 700 or VRC 700f

uniSTOR heat pump cylinders

  • Fully compatible with the Vaillant heat pump range
  • Range of options and accessories to cater for a wide range of projects and requirements
  • Superior insulation and efficiency

VRC 700 & VRC 700f

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


How to get

Request a quote

Vaillant Commercial boilers and accessories are available over the counter or as a next day service at most plumbing and heating merchants throughout the UK.

We can provide you with bespoke solutions to accommodate a variety of installations. To discuss your requirements please contact us.