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.
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.
No occupancy guesswork and no schedules to maintain — the system reads the pressure each appliance creates and answers it in real time.
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.
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.
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.
Both sense duct pressure and modulate a direct-drive, variable-speed fan — purpose-built for the vertical risers of multi-story, multi-family and mixed-use buildings.
Built for existing risers serving multiple kitchen hoods, bathrooms or dryers across floors. Reuses ducts, fan connections and power already in place — most of the work is adding the controller and pressure sensing near the fan.
Designed specifically for buildings with clothes dryers on multiple floors or in a shared laundry. One fan can serve a whole riser, modulating with the load instead of running flat-out 24/7.
Tell us about your risers and appliances. We'll model the conditioned-air and fan-energy savings for your specific building and climate.