Holistic Indoor Air Quality Management consists of five different key issues:

  1. Filtration & purification as required in each case;
  2. Dilution of CO2 and indoor pollutants with cleaned outdoor air;
  3. Pressurization of spaces (positive / negative);
  4. Demand based IAQ control to optimize indoor air quality, minimize the energy use and ensure long life cycle of filters;
  5. Continuous display of Indoor Air Quality monitoring results is the best “certification” you can get for your building.

Each of these aspects are equally important when designing and maintaining good Indoor Air Quality in an energy efficient building.

Indoor air quality management starts by setting targets for various IAQ parameters. This can be done based on e.g. ISHRAE IEQ standard 10001:2016 as either Aspirational or Acceptable quality level. IAQ management measures depends on the target level and current challenges in air quality.

Particulate Matter PM2.5 & PM10:

  • Sufficient air filtration in the outdoor air intake;
  • Replacement of indoor air in every 30-60 min;
  • Positive air pressure inside the building to prevent infiltration of outdoor air;
  • Efficient exhaust system in the kitchen.

Carbon dioxide:

  • Dilution by ventilation: supplying outdoor air that has low CO2 concentration (450 ppm) to replace air inside the building;
  • Plants to remove CO2 and release O2.

Total Volatile Organic Compounds:

  • VOC sources removed (use of zero VOC products);
  • Dilution by ventilation;
  • Specific plants in naturally ventilated pots.

Carbon monoxide:

  • Outdoor air intake far away from vehicle emissions;
  • Positive air pressure inside the building to prevent infiltration (especially in ground floor near garage doors);
  • Efficient exhaust system in the kitchen.

Other outdoor air gases (SO2, NO2, O3):

  • Sufficient air filtration of the outdoor air intake;
  • Outdoor air intake far away from vehicle emissions;
  • Positive air pressure inside the building to prevent infiltration.

Temperature and RH:

  • Ensuring that the air conditioning system is able to handle the sensible and latent load of outdoor air.

Microbiological contamination:

  • Avoid high relative humidity;
  • Repair moisture damages immediately (<24 h);
  • Ensure clean soil for plants;
  • Sterilization of air is only required in allergy & asthma rooms.


  • Positive air pressure in the surrounding spaces preventing odours to spread;
  • Efficient exhaust air system with sufficient air filters;
  • Ozonisation of space when not occupied.

User Satisfaction:

  • Ensure that users are satisfied with their indoor environment by asking their feedback once a year (user satisfaction survey);
  • Continuous air quality monitoring and display.

Santrupti Continental solutions are mostly based on the improvements in the mechanical ventilation and kitchen exhaust systems, but in some cases the room air purifiers or plants are used to complement the solution.


Our solutions consists typically the following product concepts:

  • Ambient Air Purifier brings cleaned outdoor air into air handling unit room or directly into a space, keeps indoor air clean from pollutants (dilution), ensures low CO2 level and positively pressurizes spaces in order to prevent infiltration of dirty, hot & humid outdoor air. More information: AMBIENT AIR PURIFIER
  • Improved filtration in the existing Treated Fresh Air units or in case there is only a natural air intake, the Treated Fresh Air unit or Ambient Air Purifier is installed. More information: AIR FILTRATION
  • Smart controller that controls the air flow rate based on the indoor and outdoor air quality measurement. Air quality monitoring results can be followed-up in online user interface – occupant interface displays the current air quality and facility management interface allows to study air quality parameters during past year. More information: CONTROL AND MONITORING
  • Room Air Purifier cleans the room air by circulating the room air through various filters and blowing it back to the same space. More information: ROOM AIR PURIFIER
  • Kitchen exhaust filtration system is required to remove the grease from the exhaust air before extracted to the duct work. More information: KITCHEN VENTILATION