Annual report 2018–2019 | 11
A Net Zero Building The district is pursuing a sustainability goal of “Triple Net Zero” meaning that the building will strive to meet the highest sustainability targets for energy, water and waste. The building committee is reviewing the design features of the school in this regard to make sure that they are not only environmentally sustainable, but fiscally responsible. Project Costs High-level estimated project costs are projected to be between $120M–$130M with an MSBA reimbursement rate between 35%–45% of the total project costs. Thus, the estimated Acton share of the costs will be between $60M–$68M, and the estimated Boxborough share of the costs will be between $10M–$12M. The estimated tax impact for the average single family home in Acton is between $650–$850 and in Boxborough is between $450–$600. MSBA reimbursement 35%-45%: $40M–$60M. We are currently working with our cost estimators on a revised cost estimate based on our most recent plans and anticipate that cost estimates will become more refined in early fall 2019. Please check back for more information and updates.
Path to Net Zero Energy
BASELINE BUILDING Typical school energy usage in MA
REDUCED LOADS • LED Lighting • Smart Outlets • Occupancy sensors
OCCUPANT ENGAGEMENT • Sub-metering and friendly competition • Wider set points • Shared equipment
Energy Use Intensity kBtu/sf/yr 58 48 42 32 28 Goal
ON- SITE PVs
ENVELOPE • Limited amount of glass • High insulation levels • High performance windows • Envelope commissioning
HVAC • Ground source heat pump • De-couple ventilation from conditioning • Energy recovery • Performance monitoring
Upcoming Dates MSBA Project Scope and Budget Approval Meeting Special Town Meetings (Acton & Boxborough)
• Airtight building • Exterior shading
October 30, 2019 December 10, 2019
Anticipated construction start date
May 2020
Anticipated new building completion date
August 2022
All images provided on this spread courtesy of Arrowstreet Architects.
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Acton-Boxborough School Building Project
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