Recovery and direct extraction from the toilet bowl
WC connection to recovery exhaust
Based on frequent requests from our clients who want to connect toilet ventilation systems to recuperation, we have prepared an article describing this solution for you.
The fastest removal of odors from the toilet
If you plan to implement a toilet using the so-called Geberit, you must choose a version with the possibility of connecting an odor extraction ( e.g. Duofix, Kombifix ) or, alternatively, a product of another manufacturer with a different marking. A fan is usually connected to these systems and the air is discharged to the exterior. However, if you plan ventilation with recovery, these systems can be connected without an unnecessary additional opening in the facade and other sources of noise in the form of a fan. The result is a quick removal of odors directly from the toilet.
As part of the ventilation system with recuperation conducted in a flexible system of 75 mm or 90 mm, an exhaust valve is installed in the ceiling, which is usually sized to extract 20-30 m 3 /h of air from the room. A branch is fitted to the pipe that leads to it, which, as a type of product, we make to measure - choose according to the size of the ventilation pipe:
Branch for flexible pipe 90 mm - Luftuj.cz
Branch for flexible pipe 75 mm - Luftuj.cz
From this branch, you will lead the flex pipe as close as possible to the suction branch from the toilet bowl. To do this, you can use the extension of the toilet wall. You can further reduce the ventilation flex of the pipe to a pipe diameter of HT50 or HT40 depending on the type of WC system using our fitting:
Transition of WC HT 40 ventilation (geberit) to recuperation - ATYP - Luftuj.cz
Transition of WC ventilation HT 50 (geberit) to recuperation - ATYP - Luftuj.cz
For large do-it-yourselfers, a solution is offered that just before reducing to HT, you put a flap on the flex pipe to close the air extraction, so that the toilet does not dry out when it is not used for a long time, and you do not forget to make a service hole or pull the flap control into the room using a shaft. We are currently testing the version with a servo drive.
Manual control valve for DN90 mm - Luftuj.cz
Manual control valve for DN75 mm - Luftuj.cz
The advantage of the whole solution in general is that you will ventilate the toilet more efficiently than normally with only an exhaust valve, while you will still recover heat.
You can see below (Fig. 1) how the design of the solution with extraction can look like, as well as the picture of the assembly from the flexi pipe to the toilet (Fig. 2).
Giant. 1 Exhaust from the toilet with a branch in front of the valve
Giant. 2 Example of assembling the air extraction connection from the WC
Published on 25/05/2021, the authors of the article Ing. Tomáš Trávníček and Ing. Pavla Skalická
Updated 3/30/2022
