Kitchens, baths and dryers in a vertical subdivision run less than 30% of the day — yet most building risers blast at full speed around the clock. Demand-controlled ventilation senses duct pressure and modulates the fan to match real demand.
Fan power scales with the cube of speed — so idling near 14% reclaims almost all the energy a constant-speed fan burns.
30% of the day a typical dryer, hood or bath fan is actually in use.
MEANWHILE
100% is the speed a constant-speed riser holds, all day, every day.
Every hour the fan spins flat-out with nothing running, it pumps heated or cooled air straight out of the building — air you already paid to condition. Why waste your energy? A demand-controlled riser turns that waste back into savings.
How demand control works
No occupancy guesswork and no schedules to maintain — the system reads the pressure each appliance creates and answers it in real time.
STEP 01 · IDLE
When no appliances are running, the fan holds at a very low trickle speed — just enough to keep the riser balanced, drawing almost no power.
STEP 02 · SENSE
An appliance starts and its fan pushes air into the shared duct. Pressure climbs. A high-accuracy sensor catches the change within ±2% of set point.
STEP 03 · MODULATE
The controller's PID loop ramps the direct-drive, variable-speed fan up smoothly to hold exact pressure — then eases back down the moment demand falls.
Aesthetically clean, flexible and quiet solutions for virtually every vertical application. The system adjusts automatically to demand: no appliances running, it idles low; one starts, it answers.
Behind some of the world's highest-profile buildings.
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