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Albert Lea Area Public Schools. Mechanical Systems Assessment and Recommendations 1/31/2011. Background & Process to Date. Six District buildings were originally constructed between 1951 and 1967. Based on the expected life of a building, these buildings are the “same age.”

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albert lea area public schools

Albert Lea Area Public Schools

Mechanical Systems Assessment and Recommendations

1/31/2011

background process to date
Background & Process to Date
  • Six District buildings were originally constructed between 1951 and 1967. Based on the expected life of a building, these buildings are the “same age.”
  • The mechanical HVAC systems within these buildings are primarily original and are beyond their typical life expectancy.
  • Due to the similarity in the ages of these buildings, a concern is that the systems may “all fail at once.”
background process to date1
Background & Process to Date
  • Building systems within these facilities are beginning to require regular attention and associated resources that exceed normal on-going maintenance.
  • Maintenance and repair costs associated with the current systems are continuing to increase in an effort to keep buildings operating and reasonably comfortable.
  • Significant work has been required at Hawthorne, Brookside, and Sibley in order to begin this heating season.
background process to date2
Background & Process to Date
  • A survey of mechanical HVAC systems currently serving these of these buildings was conducted in August 2010. Results of this survey were presented in October 2010 to the District.
  • The goal of this survey was to determine the status and condition of the existing systems and to develop a plan to address future needs associated with the systems.
  • By taking a proactive approach to addressing needs associated with these systems, the District hopes to eliminate the risk of major failures at numerous buildings occurring simultaneously.
observations
Observations
  • Original steam boiler plant in each building except Halverson
  • Building-wide air conditioning at Lakeview and Brookside
  • Original unit ventilators serve most classrooms and other spaces
  • Temperature controls are pneumatic (air) with a limited front end scheduling system - very challenging to monitor and control temperature - no means of monitoring ventilation
  • Original units were not designed to provide ventilation and temperature control to today’s standards
  • Units and system components are beyond typical useful life expectancy
observations1
Observations
  • Distribution piping is in marginal condition in many locations
  • Many building floor plans have been altered , impacting the ability to control and monitor each area effectively
recommendations
Recommendations
  • Primary focus of the recommended project(s) would be to increase indoor air quality and ventilation rates to current MN State Code/ASHRAE 62 ventilation standards, and to replace old equipment that is not operating appropriately
  • Work would include replacement of the existing unit ventilators, air handlers, and heating equipment that are not currently capable of providing ventilation to minimum standards
  • In most buildings, the existing boiler plants would continue to serve as the primary heating source, but would be converted to hot water for increased efficiency and controllability
  • Opportunities to increase energy efficiencies within each facility will be identified and integrated into the project
recommendations1
Recommendations
  • Hawthorne’s boiler plant will need to be replaced—in current condition life expectancy is less than five years
  • Specific attention will be placed on any systems or components that are able to be rebuilt and remain in use wherever appropriate
  • New systems could include variable air volume control or displacement ventilation, variable speed pumping, and Direct Digital Controls to allow for optimization of all system operations
  • Each space would have separate environmental control to ensure proper ventilation rates to all spaces tied to a main DDC system
anticipated budgets
Anticipated Budgets

Hawthorne: $2,400,000

Brookside: $3,200,000

Southwest: $3,400,000

Sibley: $2,000,000

Halverson: $2,000,000

Lakeview: $1,900,000

Project Total: $14,900,000

Funding Source: Alt Facilities Bond, Capital Funds

proposed timeline
Proposed Timeline
  • Winter 2010/2011: Present Concepts to Board for Review
  • Winter 2010/2011: Refine Work Scopes and Project Phasing
  • Spring 2011: Submit Applications to MDE
  • Summer 2011: Approval from MDE
  • Summer 2011: Complete Applicable
  • Summer 2012: Construction for Phase 1: Hawthorne and Brookside
  • Summer 2013: Construction for Phase 2: Southwest and Sibley
  • Summer 2014: Construction for Phase 3: Halverson and Lakeview
next steps
Next Steps
  • Refine / Finalize Scopes of Work as Required
  • Finalize Funding Strategies
  • Formally Approve Plan
  • Retain Project Team Members
  • Initiate Project Development Work Including all MDE Requirements & Interface and Detail Energy Analysis
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