Smart Building: Enhance and Optimize your ventilation with Rensair

Rensair “Smart Demand Controlled Ventilation” (SDCV) provides an excellent Indoor Air Quality environment while significantly reducing energy consumption and carbon emissions by more than 40% in buildings.

Rensair “Smart Demand Controlled Ventilation” (SDCV) takes HVAC efficiency to another level by both part substituting expensive mechanical ventilation with cost-effective air purification and also by optimizing the mechanical ventilation/air purification mix in real time to suit occupancy levels.

Rensair is implementing SDCV with large multinationals, public institutions and leading universities, helping them take large steps forward in reducing energy consumption towards their Net Zero targets.

Rethink how buildings are ventilated


Need to rethink how buildings are ventilated

Buildings account for 40% of global energy consumption and carbon emissions. Of that, 40% is directly related to Heating, Ventilation, and Air Conditioning (HVAC), making it the largest line item in a building’s operating budget. In order to meet Net Zero, this needs to be addressed.


9 times less energy

Rensair air purification delivers one cubic foot of air for 9 times less energy than what it costs through a traditional HVAC system.

Mechanical ventilation consumes a large amount of energy to condition the air drawn into a room to the right temperature (heated or cooled) and to the correct humidity level. Rensair, on the other hand, simply cleans the air that is already in a room – no conditioning is required.

Smart buildings

Smart Demand Controlled Ventilation

SDCV optimizses the ventilation mix in a building by:

  • part substituting the mechanical ventilation with a more cost-effective air purification
  • ventilating at a rate that matches the building occupancy rate.

The total air volume remains unchanged but energy consumption and carbon emissions are substantially lowered. Further, Indoor Air Quality (IAQ) is typically improved, as outside air in many parts of the world is not clean air.

Smart buildings

Quick implementation, immediate ROI

Rensair has implemented SDCV solutions in the offices of large multinationals and large university facilities.

Rensair offers free consultations to provide energy savings potential estimates for all building types.

After the consultation, implementation is simple and can be done in a matter of weeks.

Clients who use Rensair’s fully managed subscriptions model see an immediate Return on Investment.

Smart buildings

Indoor Air Quality Sensors

The increased awareness of the importance of good Indoor Air Quality (IAQ), as well as the need to optimise mechanical ventilation rates to deliver good IAQ, have both led to increased demand for IAQ data measured by air sensors. There is understandably a lot of discussion about the varying quality of different sensors and the range of pollutants that are measured, but the importance of the placement of the sensor in a room is often neglected.

To demonstrate the importance of the air sensor placement, Rensair conducted a simple trial in a ventilated furnished room, measuring introduced airborne pollutants with three sensors installed in different locations.


How do air purification and mechanical ventilation work together?

Air purification removes indoor airborne particulate matter and gas pollution through a continuous filtration process. Mechanical ventilation dilutes pollutants by introducing outside air into an indoor space and removing existing air to the outside. Research shows that the two cleaning processes are additive, combining to provide a cumulative improvement in indoor air quality.

What other benefits come from SDCV?

Because a lower volume of air will be ventilated by the mechanical HVAC system, its future maintenance requirement will be lower. Furthermore, any future HVAC upgrade can be completed with a system that delivers a smaller ventilation volume, saving substantial retrofit costs.

What do air purifiers remove?

HEPA filtration has been used in the healthcare sector for many decades. Together with carbon filtration, a well designed air purification unit that uses these technologies will remove airborne viruses, bacteria, fungi, mould spores, smoke particles, pet dander, dust mites, allergens, pollen, ultra fine dust particles, and odours.

Making ventilation sustainable

The Rensair air purification delivers one cubic meter of air for 9 times less energy than what it costs through a traditional HVAC system.