
Installation behind the knee wall
In this timber-frame house we used the knee wall in the attic to route the main ducts. From the attic we branched off to the bedrooms, bathroom and other rooms.
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In this timber-frame house we used the knee wall in the attic to route the main ducts. From the attic we branched off to the bedrooms, bathroom and other rooms.

Always 2 supply valves in the master bedroom, for low noise and plenty of fresh air.

During renovations we install an energy-efficient HRV system with Zehnder Q for a healthy indoor climate and savings.

The full Zehnder connection kit: valves, drying siphon, silencer. Watertight, airtight, whisper-quiet.
Commercial project: complete HRV + ERV + heat pump build. Joint delivery with the insulation and concrete-drilling contractors.

With its clean design, this unit remains a reliable choice in 2025, modern performance for efficient ventilation.

Regular visits to the Zehnder Academy so we always know the latest systems inside out.

Ducts are hidden between the upper floor and the ceiling. Only the Luna valves are visible, perfectly integrated into the ceiling.

Ducts are insulated and neatly capped to prevent dust entering the ductwork during construction.

In this timber-frame house we routed the spiro ducts neatly through the cupboard, while preserving the right airflows for efficient operation.

We installed two insulated, top-quality roof penetrations, designed to prevent leaks, withstand storms and minimise noise nuisance.

For the living room we installed two ducts, each with two supply points, neatly capped until the floor is fully insulated and finished.