S-OASIS project is applying for LEED Gold V4 C&S certification. LEED (Leadership in Energy and Environmental Design) is the most internationally recognized green building rating system established by the U.S. Green Building Council. The details of LEED requirements that are implemented in S-OASIS are following.

Location and Transportation


S-OASIS project is located on Vibhavadi Rangsit Road, a previously developed area, within 400-m walking distance is surrounded by more than 8 diverse basic services.

Alternative transportation

The project is located in an area where public transportation is available within 800-m walking distance, MRT (Chatuchak Park station), and bus stop which can help to reduce the use of personal cars.

Preferred parking spaces

Preferred parking spaces are provided for carpools (5% of the total parking spaces), green vehicles (5% of the total parking spaces), and electric vehicle supply equipment (EVSE) (2% of the total parking spaces) to support the use of environmental-friendly vehicles.

Sustainable Sites

Construction activities pollution prevention

During the construction period, the project created and implemented an erosion and sedimentation control plan to minimize soil, water, dust, and other pollution caused by construction activities.

Open space and green roof

To help reduce the urban heat island effect, more than 30% of the site area is dedicated to outdoor space which 25% is vegetated also light-color pavements are selected for the hardscape area.

Enviromental refrigerant

Façade and landscape lighting are set automatically to turn off between midnight and 6 AM to reduce light pollution to the sky and surroundings.

Water Efficiency

Outdoor water use

Outdoor water use,the project is designed to uses 100% recycled water for the landscape area

Indoor water use

The project considers reducing potable water for indoor water use throughout the alternative potable water system (recycled water) together with the selection of the water-saving type fixtures, which can reduce more than 50% of potable water use compared to general office standards.

Cooling tower

At least 20% of make-up water is recycled water.

Water metering

To monitor the water use during the building operation, the project is installed the water meter in the project’s water subsystem.

Energy and Atmosphere

Optimized Energy Performance

To achieve a 9% energy reduction from LEED baseline, the project designed the high-efficiency central chilled water with Variable Air Volume (VAV) system together with the high-performance façade system, Laminated insulated glass with Low-E coatings, also the selection of LED for a lighting system with automatic daylight and occupancy sensor control.

Energy metering, monitoring, and commissioning

The commissioning agent is set to verify the design, construction, and eventual operation of a project that meets the owner’s project requirements in terms of energy. The project is also installed energy meters in sub-energy systems and linked them to the building automation system (BAS) to controls and manage the building.

Enviromental refrigerant

No CFC is used in cooling refrigerants.

Materials and Resources

Waste and recycling management

More than 75% of the project’s construction wastes are diverted through reuse and recycling strategies.

For the operation period, recyclable and hazardous waste storage areas have been provided separately at the BOH area to support the reduction of the waste disposed of in landfills.

Recycled materials

More than 25%, by cost, of the total value of permanently installed building products in the project is containing recycled content.

Indoor Environmental Quality

Indoor Air Quality

Smoking and the use of E-cigarette are strictly prohibited in S-OASIS project except for the designed smoking area.

3-m long in the primary direction of travel entryway systems are installed at all the building entrances to capture dirt and particulates entering the building.

All the occupied areas designed the outdoor air ventilation rates 30% above ASHARE 62.1-2010 standard. The OAU is equipped with pre-filter MERV8 and medium filter MERV14, which can capture at least 75% of PM 2.5. The UVC lamps are installed at the AHU to treat recirculated air

The janitor areas are designed to be negative pressure together with self-closing doors and deck-to-deck partitions to prevent interior cross-contamination.

Low-Emitting Materials

All the paint, coating, adhesives, and sealants that are applied in the building are selected to be low VOCs type to reduce concentrations of chemical contaminants that can damage air quality, human health, productivity, and the environment.

Quality views

The project is designed to have more than 75% of regularly occupied space having sufficient quality views which allow building occupants to connect with the outdoor natural environment.