PAC Facteur 7®

PAC Facteur 7® is an innovative system for domestic hot water which combines heat recovery from greywater (water from the shower, washing machine, sink ...) and a high efficiency heat pump.

PAC Facteur 7® is a solution for buildings and publics facilities, both new and renovated.



Heat recovery from greywater can reduce consumption


The lowest power consumption in the market for the production of domestic hot water is a lever for :

  • Reduce the operating cost per m3 by over 60%
  • Respecting requirements of "RT 2012"
  • Allocate more margin to other uses of the building


100% of domestic hot water requirements without any external supplements

  • COP : 6.4
    PAC Facteur 7® divides the final energy consumption by a factor of 6.4 to produce domestic hot water by recovery of the energy available in greywater.
  • Cep : 7 à 12 kWhep/m²SHON-RT.year
    Jusqu’à 80 % d’économies réalisées sur le poste ECS par an.
  • Qualification awarded (03/26/2014) : "Titre V RT2012"
    This brings significant gains during regulatory phases.
  • 2 models : 20Kw or 40Kw (thermic)
    From 2 000 litres to 22 000 litres of DHW at 55° every day without supplement, in accumulative or semi-accumulative mode
  • EnR contribution > 30%
    The PAC Facteur 7 ® system uses a proportion of renewable energy greater than 30% to produce DHW
  • 4 patents for PAC Facteur 7®
    The device has been validated by several tests at Mines Paris Tech's Center Energy Efficiency Systems (CES)

Up to 80%

from savings by year on domestic hot water


Filtration and storage of greywater

Recovered water is filtered (fats and residues) and stored at 31°C in an insulated tank

Production of dosmetic hot water

City water from 10°C to 27°C with heat recovery
Preheated water passes from 27°C to 58°C with the heat pump

Storage of domectic hot water

Ready to supply the building


With PAC Facteur 7,you get the assurance of having advanced equipment with proven effectiveness. And you also enter a new world of technology in the service of the environment.

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The PAC Facteur 7 technology has been acquired by Solaronics Chauffage, french industrial SME, has 70 years in the world of heating of industrial and commercial buildings. Today, it ensures the manufacture, marketing, installation and maintenance.

Let's talk

Find Us

Retrouvez nous au Z.I. n°3 Rue du Kemmel, 59429 Armentières Cedex France

Contact us to study the feasibility of our solution with your project.

E-mail : contact[at]
Téléphone : +33 3 20 10 59 59