123210 - Portales I
4800 North Scottsdale Road
Scottsdale, AZ 85251
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Portales Corporate Center is the ultimate in contemporary architectural design, and sets the standard for Class A office product and design in the Scottsdale market. Prominently located at Scottsdale Road and Chaparral, the award-winning building uses Colorado Red granite in both flamed and polished finishes reflecting the local mountain preserve areas and Rose-copper high performance glazing and finished metal together with its distinctive knife edge points pull the overall contemporary vision together providing an impressive and sophisticated office building.
Portales I is the anchor building of multi-phase office project and consists of six floors with 275,000 rentable square feet of office space, a three-level subterranean parking structure, an amphitheater with stadium seating, temperature controlled storage areas, ample surface parking, scenic site landscaping, a delicatessen with Starbucks coffee, and Portales I is home to the famous James Beard Award winning Roaring Fork restaurant. The building is ENERGY STAR and LEED Gold certified and has been the recipient of several awards from the BOMA Green Buildings Committee; including the Kilowatt Krackdown Award for greatest energy use reduction, the Golden Dumpster Award for significant achievements in the area of waste reduction, recycling and tenant education, and Portales I has won four TOBY Awards. Listed below are the past, current, and planned energy-saving measures for this facility.
Past and ongoing energy-saving strategies:
• Re-programmed all air handling units (AHU) for supply air reset based on outside air temperature (operator adjustable and operator manual control).
• Re-programmed chilled water reset based on outside air temperature (operator adjustable and manual control).
• Re-programmed all electric heat for all fan powered boxes to go off automatically based on outside air temperature (operator adjustable). We also programmed for the operator to manually lock out the electric heat.
• Installed variable frequency drives (VFD) on Return Air Fans (2). The control strategy is based on building static pressure.
• Installed VFD’s on twelve AHU’s on floors one through six.
• Installed VFD’s on the outside air fans (2). The fans were constant volume air fans balanced to the engineer’s specs per floor. Replaced the permanent air filters with disposable pleated air filters- replace every two months on the two outside air fans on the roof.
• Pressure wash chilled water coils on AHU’s annually. Note: The Engineering Team installs a pre-filter on the AHU when we have a Tenant Improvement (TI) and after the construction is completed, the Team pressure washes the coil(s) and installs new air filters.
• The Engineering Team replaces air filters on AHU’s bi-annually with Merv 13.
• Manually re-program the start-stop of all AHU’s based on outside air temperature conditions.
• Re – Engineered the 150-ton heat exchanger located in the central plant for the closed condenser loop.
• Installed condenser water control valves on each cell of the 1210 ton Evapco two cell cooling towers. We also installed a program to operate the two cell cooling tower. When one chiller is on-line, only one cell of the two cell cooling tower operates. We also use less water usage with this strategy.
• Programmed the condenser water re-set from 80 F to 74 F for the chillers when the chiller operates at 80% load, temp is above 70 F and the wet bulb temperature is below 68 F. By setting the condenser temp down to 74 F we increase the efficiency of the chiller by 10% which is 50 tons. By this strategy we also can be able to operate one machine instead of two machines at certain times of the year (May, part of June, and September).
• Manually set all thermostats up to 78 degrees on all VAV and fan powered boxes on all vacant spaces.
• Installed a Wattstopper lighting control system on all 277 volt lighting throughout the building. Also installed a lighting sub panel on the east mechanical room to control 120 volt tenant lighting.
• We turn off central plant one and one half hours earlier than we have in the past for Roaring Fork restaurant. The chiller plant was on till 1:00am every day. We moved the schedule back one hour and now have the plant shut down at 11:30 pm. We have not have any problems from the Roaring Fork on the schedule. We are saving approximately $15,000 a year in energy savings.
• Operate theater AHU’s based upon tenant occupancy.
• Installed VAV boxes on all the outside air intakes at each AHU. The VAV boxes open fully based on outside air temp and go to minimum setpoint based on people on the floor.
• Installed new coating on roof.
• Installed new light sensor for EMS for outside lighting control based upon sunrise and sunset times.
• Controled the lag chiller to only operate during the hot months of the year. And only on Monday through Friday from 5:00am to 11:00am the lag chiller may start. If it does not start during these times, the lag chiller is locked out from operating.
• Install new aerators on all the bathroom faucets from 2.2 gal to 0.5 gal.
Current energy-saving projects:
• Install new energy efficient lighting in parking garage.
• Install new LED MR16 lights to replace 50watt halogen MR16’s throughout the building.
• Install new LED lighting throughout the building where possible.
• Install new LED 4’ lamps in existing 4 lamp fixtures in Management office.
• Install new LED lighting in the theater.
• Perform duct sealant on all 12 AHU’s – operate the chiller at design supply water temperature and lowered all static control setpoints down between 1.2 inches to 1.6 inches from 2.4 to 3.0 inches.
Future energy-saving projects:
• Install occupancy sensors on all exterior and interior offices.
• Install new LED lighting throughout the building where possible.
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Please note: Narrative information in this profile has been provided by Principal Real Estate Investors or a representative of this facility. Other building information was verified and submitted to EPA at the time of application. Building energy performance, operating characteristics, and ownership/management may be subject to change over time.
Building Owner:*
Principal Real Estate Investors
Property Manager:*
Forum Capital
Year(s) Labeled (Rating):
2010 (83)
2011 (81)
2012 (87)
2013 (90)
2014 (86)
2015 (93)
2016 (95)
Facility Type: Office
Total Floorspace: 324779 sf
Year Constructed: 1999
Contract Type: None
Technologies Used:
| Stage 1-Recommissioning |
| Stage 3-Load Reductions |
| Stage 4-Fan Systems |
| Stage 5-Heating and Cooling Plant |