Stagnation prevention
Drinking water hygiene has never been so convenient
To ensure the flawless functioning of a building installation, the planner has to take the maximum usage situation into consideration. In practice however this maximum usage is not the usual situation. Stagnating sections and insufficient hygiene in both the cold drinking water (PWC) and hot drinking water (PWH) can be the consequence. Changes in the use of the building or people within the building could have a similar effect. During the lifetime of a building, the actual frequency of withdrawals and volumes deviates strongly from the originally planned values. On top of that, the intended use is no longer guaranteed here.
The new KHS Hygiene Flush Boxes help restore the intended use through controlled “forced withdrawal”. Water exchange is controlled during this through the time, temperature and volume parameters.

KHS hygiene system
The KEMPER Hygiene System, KHS, prevents stagnation and the resultant impairment of drinking water quality. It ensures that fresh, hygienically perfect water is always available at every tap, taking into consideration efficiency and sustainability concerns. It offers every stakeholder, from the planner to the operator, from the installer to the end consumer, maximum security and safety in their daily contact with drinking water.
Hygiene Flush BoxPRO
for large buildings with special hygiene requirements
PRO
- Seven timer for individual flushing strategy in particularly hygiene-sensitive buildings
- Interval, time, volume, temperature and usage-controlled flushing
- Convenient and safe operation via WLAN (can be switched off) using the latest Access Point Technology
- Up to 100,000 event entries to verify use as intended
- Analysis and log readout via WLAN and USB
- Flushing process management detects savings potentials and suggests improvements
- Networking of up to 60 hygiene flush boxes possible
Hygiene Flush BoxPURE
for time-controlled interval flushing operation in small buildings
PURE
- Interval controlled flushing
- Commissioned in less than a minute
- Up to 100,000 event entries to verify use as intended (readout via USB)
- Automatic detection and checking of all functional components
- Optional upgrade to PRO
Hygiene Flush BoxLITE
for safety-sensitive buildings
LITE
- No integrated controller logic
- Own control for direct connection to building automation systems / BMS
Installation and assembly options
One Hygiene Flush Box for all purposes
KEMPER Hygiene Flush Boxes can be installed surface-mounted or flush-mounted without additional accessories. Thanks to the innovative housing concept, all versions of the Hygiene Flush Box can be either integrated almost invisibly flush-mounted into the wall structure or installed elegantly surfacemounted on the wall.
What‘s more, the technology behind the Hygiene Flush Boxes is so sophisticated that comfort is assured – to maintain intended use, the controlled water exchange is ultraquiet.
Installation options

Practically invisible when flush mounted
// integration in the backsplash

Practically invisible when flush mounted
// integration in drywall plasterboard

Elegant when surface-mounted
// due to compact design
// no accessories necessary
// Networking of several Hygiene Flush Boxes using
KHS Mini-Control System MASTER 2.0
// Installation on a solid wall
Quick guide to KHS Hygiene Flush Box
Compare models at a glance
PRO KHS Hygiene Flush![]() Box PRO | PURE KHS Hygiene Flush![]() Box PURE | LITE KHS Hygiene Flush![]() Box LITE | |
Operating models | |||
Time control | x | x* | |
Interval control | x | x | x* |
Volume control | x | x* | |
Temperature control | x | x* | |
Usage-orientated control | x | x* | |
Control | |||
Operation via WLAN (can be deactivated) using Access Point Technology | x | ||
Operation via the controller | x | ||
CAN bus networking possible | x | ||
Incorporation into BMS (BACnet & Modbus) via KEMPER Hygiene System KHS | x | ||
Direct control via BMS (24V/4-20 mA) | x | ||
Integration in BMS via digital I/O | x | ||
Potential free contact for fault messaging | x | x | x |
Features | |||
Digital assistant for commissioning and maintenance | x | ||
Automatic functional testing of all components (24/7) | x | ||
Data storage (up to 100,000 event entries) | x | x | |
Data transfer via USB interface | x | x | |
Data transfer via WLAN | x | ||
Visualised flushing history | x | ||
Planning / calculation via Dendrit STUDIO 2.0 (2019K) SP2 - from June 2020 | x | x | x |
* depending on external flushing logic |
An economically viable version for every building:
PRO KHS Hygiene Flush![]() Box PRO | PURE KHS Hygiene Flush![]() Box PURE | LITE KHS Hygiene Flush![]() Box LITE | |
Hospitals | x | (x) | |
Care facilities | x | ||
Geriatric care | x | ||
Residential buildings | x | x | |
Halls of residence | x | x | |
Hotels | x | ||
Detention centres | x | (x) | |
Accommodation blocks (e.g. military) | x | (x) | |
Schools | x | x | |
Sports facilities | x | x | |
Kindergartens | x | x | |
Laboratories | x | ||
Industrial buildings | x | (x) | |
Department stores | x | (x) | |
Swimming pools | x | ||
Interim solutions | x | ||
(x) needs external control |