Fresh air passes from the corridor into the room.
Strata
Within the Riotherm system, Riotherm Strata handles the air exchange. The line uses air stratification and transfer ventilation to supply rooms with fresh air as needed.
Air exchange that relieves the architecture
In many buildings, air is distributed horizontally with considerable technical effort. Riotherm Strata instead uses the natural stratification of the room air.
Fresh air passes from the corridor into the room. Warm air with a higher CO₂ content is removed at the top. This creates needs-based air exchange with fewer ducts, less pressure loss and less visible technology.
Strata products at a glance
Transfer fans
Visual and acoustic discretion
Transfer fans actively exchange air between a centrally ventilated corridor and the room. With the IQ-CO₂ option they move air only where it is needed. And only when a room is occupied or air exchange is required.
The transfer fans are designed for a high level of acoustic separation. Air can circulate while conversations and noise stay in the room.
The visible covers can be matched to the interior fit-out – in wood, veneer or powder-coated steel, for example – and are installed in the wall or in the door.
Benefits at a glance
Fewer ducts. More space
The corridor takes over air distribution on the floor. That reduces installations, space requirements, coordination as well as material and installation effort.
Air only where it is needed
Transfer fans and IQ-CO₂ adapt the air exchange to occupancy and air quality, avoiding unnecessary air volumes in unoccupied rooms.
Quiet and discreet
Low air velocities and high acoustic separation allow air exchange without burdening the room with noticeable air movement or noise.
Flexible when use changes
When room layouts change, the air supply can be adapted using existing elements, without rebuilding the entire horizontal duct network.
Less pressure. Less energy
Short air paths reduce the pressure required and therefore the fan energy compared with conventional horizontal air distribution on the floor.
Less Tech
Sustainability through avoidance
Riotherm Strata reduces infrastructure before it ties up energy and resources. The corridor takes over air distribution on the floor, and transfer fans activate the air exchange only when needed. The result is fewer ducts, less material, lower pressure losses and less air moved unnecessarily – both during construction and throughout operation.
Case study
Stale air in the classroom, Riotherm airs it out
Riotherm Strata uses centrally ventilated corridors for needs-based air exchange. The case study shows how transfer fans and CO₂ control create good air quality while reducing the horizontal ventilation infrastructure.
CTA: case study schools
Well prepared for the first conversation
Christoph Diem, Head of Climate Engineering, answers three questions about starting a Riotherm project.
What information do you need for an initial assessment?
For an initial assessment we need the key details about the building: type of use, energy reference area (ERA) and any available planning documents. Floor plans and façade sections are particularly helpful. They allow us to evaluate the spatial and technical starting point and develop a first solution approach.
Who should take part in the first discussion?
Ideally the client, the architects and the HVAC planners are all involved from the outset. That way we can look at requirements, spatial options and technical conditions together – and clarify open questions early on.
What happens next in the process?
Once we have reviewed the documents, we present our first solution approach in a video call and develop it further together. We then recommend visiting a suitable reference installation. On that basis we refine the solution and prepare the quotation.
Reviewing Strata air management.
Riotherm Experten-Team, Sales Manager
riotherm@erichkeller.com
