HTW SR24 Manuel De L'utilisateur Et D'installation page 39

2.4 If installed in inclosed space
The water heater must be located in a space >15m³, and must have
unrestricted air flow. As an example, a room that has an 2.5 tall ceiling
and is 3 meter long by 2 meter wide would contain 15m³ .
NOTE: Installation of outdoor units or other packaged products can be found in the
Owner's Manual & Installation Manual.
Fixed
strip
08
M8 expansion
bolt fixing
One side wall (top view)
Wall
Corner wall (top view)
Expansion bolts
Wall
M8 expansion
bolt fixing