Heat recovery systems

Drain water heat recovery systems use the heat of outgoing wastewater to preheat incoming freshwater. This is one of the few ways to reduce the energy needed to heat water without sacrificing comfort. For more on passive heat recovery from wastewater, see Passipedia.
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Ara	Shape	Efficiency class	Nominal efficiency	Dead time	Flow rate	Pressure loss	Drinking water	Waste water	Climate zones	Date certified
Component Manufacturers
ACO ShowerDrain X2.1 ACO Passavant GmbH	Tray	phC	43%	5 s	8 l/min	0.13 bar	1/2" AG	DN50	Independent	mars 2025
ACO ShowerDrain X2.2 PHI ACO Passavant GmbH	Tray	phB	60%	5 s	8 l/min	0.25 bar	1/2" AG	DN50	Independent	mars 2025
ACO ShowerDrain X 800/3 ACO Passavant GmbH	Tray	phC	42%	5 s	8 l/min	0.13 bar	1/2" AG	DN50	Independent	mars 2025
ACO ShowerDrain X 900/4 ACO Passavant GmbH	Tray	phB	54%	5 s	8 l/min	0.2 bar	1/2" AG	DN50	Independent	mars 2025
Easyfit 1200 Counter Flow Products B. V.	Tray	phB	50%	15 s	8 l/min	0.2 bar	Rp 1/2" male	DN 50	Independent	déc. 2023
ES-Drain Herwin-Energie BV	Tray	phB	50%	5 s	8 l/min	0.17 bar	1/2"	DN 50	Independent	mars 2018
Fundo Thermo with drainwater heat recovery wedi GmbH	Tray	phB	54%	5 s	8 l/min	0.38 bar	1/2”	DN 40	Independent	janv. 2026
HeatDeck Recoup Energy Solutions Ltd.	Tray	phC	41%	5 s	8 l/min	0.17 bar	1/2 "	40-43 mm	Independent	juil. 2026
HR tube 1-17 Technea	Tube	phA	63%	5 s	8 l/min	0.21 bar	Rp 1/2" female	DN 50	Independent	déc. 2023
HR tube 1-21 (Turbo Rotator) Technea	Tube	phA	69%	5 s	8 l/min	0.29 bar	Rp 1/2" female	DN 50	Independent	déc. 2023
Joulia Inline 5-73-17-0.1 joulia AG	Tray	phC	41%	5 s	8 l/min	0.28 bar	1/2"	DN 50	Independent	déc. 2020
Joulia Twinline 10-92-17-0.0 joulia AG	Tray	phB	60%	5 s	8 l/min	0.26 bar	1/2"	DN 50	Independent	déc. 2020
Recoup Drain+ Compact Recoup Energy Solutions Ltd.	Tray	phC	42%	5 s	8 l/min	0.13 bar	1/2" AG	DN50	Independent	avril 2025
Recoup Drain+ Duo HE Recoup Energy Solutions Ltd.	Tray	phB	60%	5 s	8 l/min	0.25 bar	1/2" AG	DN50	Independent	avril 2025
Recoup Easyfit+ Recoup Energy Solutions Ltd.	Tray	phB	50%	15 s	8 l/min	0.2 bar	Rp 1/2" male	DN 50	Independent	déc. 2023
Recoup pipe HEX RD Recoup Energy Solutions Ltd.	Tube	phA	63%	5 s	8 l/min	0.21 bar	Rp 1/2" female	DN 50	Independent	déc. 2023
Recoup pipe HEX (Turbo Rotator) Recoup Energy Solutions Ltd.	Tube	phA	69%	5 s	8 l/min	0.29 bar	Rp 1/2" female	DN 50	Independent	déc. 2023
showerpipe VX 1700 Counter Flow Products B. V.	Tube	phA	63%	5 s	8 l/min	0.21 bar	Rp 1/2" female	DN 50	Independent	déc. 2023
showerpipe VX 2100 (Turbo Rotator) Counter Flow Products B. V.	Tube	phA	69%	5 s	8 l/min	0.29 bar	Rp 1/2" female	DN 50	Independent	déc. 2023
showerpipe VX 2100 Twin-HE Counter Flow Products B. V.	Tube	phA+	77%	10 s	8 l/min	0.12 bar	Rp 3/4" male	DN 50	Independent	déc. 2023
Showersave QB1-10XE Q-Blue B.V.	Tube	phB	52%	10 s	8 l/min	0.2 bar	1/2"	DN 50	Independent	janv. 2025
Showersave QB1-21 Q-Blue B.V.	Tube	phA	69%	5 s	8 l/min	0.32 bar	1/2" IG	DN 50	Independent	févr. 2017
Showersave QB1-21C Q-Blue B.V.	Tube	phA	70%	5 s	8 l/min	0.32 bar	1/2" IG	DN 50	Independent	févr. 2017
Showersave QB1-21D-HE @ 8 l/min Q-Blue B.V.	Tube	phA+	78%	10 s	8 l/min	0.19 bar	1/2" IG	DN 50	Independent	févr. 2019
Showersave QB1-21XE Q-Blue B.V.	Tube	phA	70%	5 s	8 l/min	0.26 bar	1/2"	DN 50	Independent	janv. 2025
VX2100 2-21 TWIN-HE Technea	Tube	phA+	77%	10 s	8 l/min	0.12 bar	Rp 3/4" male	DN 50	Independent	déc. 2023
X-Tray Counter Flow Products B. V.	Tray	phC	47%	5 s	8 l/min	0.36 bar	1/2"	DN 50	Independent	févr. 2026
ZYPHO PiPe 55 DW ZYPHO, SA	Tube	phB	51%	5 s	8 l/min	0.19 bar	3/4”	DN 50	Independent	sept. 2024
ZYPHO PiPe 60 DW ZYPHO, SA	Tube	phB	53%	5 s	8 l/min	0.07 bar	3/4”	DN 50	Independent	sept. 2024
ZYPHO PiPe 65 DW ZYPHO, SA	Tube	phA	64%	5 s	8 l/min	0.24 bar	1/2”AG 3/4”IG	DN 50	Independent	sept. 2021
ZYPHO Slim 50 DW ZYPHO, SA	Tray	phB	54%	5 s	8 l/min	0.38 bar	1/2”	DN 40	Independent	sept. 2024