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Environmental: Structures built on the sustainable design model place minimal impact on the environment. This is accomplished through the prudent use of resources and by deploying systems for recycling and renewable energy sources such as solar power and wind energy.

Financial: Sustainability principles integrated early within the design, offer improved life cycle costs as compared to conventional buildings due to reduced maintenance and replacement. Additional cost savings are obtained through the use of recycling systems and renewable energy sources.

Social: The availability of improved air quality and natural light helps boost employee morale and productivity. Reduced strain on resources increases the availability of those resources within the specific eco-systems and geographical regions.

Sizing HVAC & R System: We, at P P Associates, understand that appropriate sizing of HVAC components is critical for the design of energy efficient HVAC system at optimum cost. Hence we adopt a systematic approach towards HVAC sizing, taking into consideration various factors such as climate, building configuration, space usage, system zoning and layouts.

We adopt high efficiency water cooled, low IKW/TR chillers on most of the projects. Depending upon their type and capacity, large chillers are specified with variable speed drives. All the chillers are specified with microprocessor based control system along with chiller manager to monitor all the parameters of the plant. The plant generally consists of energy efficient screw chillers/centrifugal chillers/VFD driven chillers, multiple primary chilled water pumps, secondary chilled water pumps with variable frequency drives, condensing water pumps, FRP cooling towers, VFD driven double skin air handling units with thermal break and variable frequency drive, fan coil units, chilled and condensing water piping, air distribution system, insulation, electrical panels, wiring, control wiring and earthing.

Efficient Chilled Water Distribution: A significant amount of energy is used to distribute water for space cooling due to year round cooling loads in most parts of India. An efficient and proper design can result in substantial operating and capital savings, and can thus have a significant impact on a building's total energy consumption. Hence, at P P Associates, the thrust is to use variable speed pumping system, a concept used by us.

Efficient Air Distribution System: While designing the air distribution system, special attention is paid to minimize pressure drops and noise by increasing the duct size, minimizing the bends & elbows and selecting the right type of air outlets. Air distribution design options are closely coordinated with architecture/interior design keeping in view the choice of duct type. Sizing is limited by the availability of the space above false ceilings.

Demand Control Ventilation: High occupancy spaces have huge ventilation requirements resulting in wastage of cooling energy, when the spaces are not fully occupied. Demand control ventilation is used to estimate the number of occupants in a space and reset the ventilation rate from the design occupancy to actual occupancy. Carbon Dioxide (CO2) sensors are the only currently accepted method of demand control ventilation. The benefits of demand control ventilation are reduction in energy conservation, reduced wear & tear of the equipment and confirmed/documented indoor air quality.

Variable Air Volume (VAV) Systems: In office buildings, shops and commercial establishments, we recommend the use of VAV's to provide the right quantity of cool air required for a specific building zone and at the same time supply different volumes to different zones. The result is that the total supply of cool air varies over the course of the day, depending on the heat gain level in different parts of the building at different times.

CO Sensors for Car Park Exhaust: Basement car park ventilation is often provided with exhaust fans to operate during normal occupancy hours. In accordance with ASHRAE Application Handbook, with reduction in vehicle emission, lower ventilation rates may be considered while designing the ventilation system for car parks. Accordingly, we recommend fans to be provided with VFD's which are actuated through CO Sensors based on the level of CO concentration, thus resulting in substantial energy savings.

Our ongoing research interests and contributions are focused on Green Buildings, HVAC & R system design for large buildings, indoor air quality, energy conservation, water conservation and integrated building management system.

  • Feasibility Study
  • Conceptual Planning
  • Preliminary Design Report and Budget Estimates
  • Detailed Planning
  • Working Drawings
  • Specifications
  • Schedule of Quantities
  • Detailed Cost Estimates
  • Notice Inviting Tender
  • Comparative Statement for Tenders-Commercial & Technical
  • Recommendation for Award
  • Contract Agreement
  • Verification of Shop Drawings
  • Periodic Site Supervision
  • Testing and Commissioning Participation
  • Assistance with As-Installed Drawings
Assistance with Operation & Maintenance Manuals & Log Books.