HVAC Services

HVAC systems are typically one of the largest consumers of energy in commercial buildings today. The primary goal of these systems is to condition the air so that occupants are comfortable and equipment runs properly. However, the complex nature of the various components required to perform heating and cooling results in various inefficiences in many systems. Opportunities exist for improvement to both central and unitary systems of commercial HVAC systems, and Bluestone has retrofitted many client's existing HVAC and mechanical systems to more efficient designs resulting in significant savings. Areas that we have retrofitted include:

• DX cooling to central plant chilled water cooling
• Upgrading existing chillers to better technology with "free cooling" plate and frame
  
• Efficient variable frequency drives on centrifugal chillers
  
• Electronically Commutated Motors (ECM motors) for fan powered boxes
  
• Building Automation System (BAS) upgrades
  
• Variable frequency drive installations on pumps and fans

EF Education

Bluestone comprehensively retrofitted EF Education's existing HVAC system to a completely new design, resulting in significant savings. The solution consisted of converting the DX cooling to central plant chilled water cooling by changing out the AHU coils and adding efficient variable frequency drive centrifugal chillers to the system. Other changes included the installation of Electronically Commutated (ECM) Motors in place of the inefficient fractional horsepower motors in the fan powered boxes throughout the building and Building Automation System (BAS) upgrades.

Annual Electricity Savings: 2,900,000 kWh

Utility Incentives: $600,000

Simple Payback: 2.7 Years

Please take a look at some of our other HVAC solutions on our case studies page.