the client, the key stakeholders, and
the design and construction teams.
With the ZNE analysis fees partially
offset by the incentive, another critical
cost hurdle was to bring the construction cost estimate within the budget.
Initial estimates were high. However,
rather than eliminate the photovoltaic
and solar thermal panels or the high
performance envelope, the façade was
simplified with a reduced quantity of
glazing. In the end the cost was kept
in line with that of the other branch
libraries that did not attain ZNE.
Due to its tight urban site, the building’s limited roof area and solar
access were primary drivers of the
configuration, dictating the target
EUI that would make ZNE feasible.
Through successful integrated
design, the design team was able
to maximize the renewable energy
generation while also finding opportunities to capitalize on other design
features. Though it ended up a one-story building, its height was raised
to minimize the roof shading caused
ABOVE The window radiators, fed by the
solar thermal panels, are used to pre-temper the outside air intakes.
TOP RIGHT Teens have a place to call their
own in the teen room. The glazed wall
blocks sound transfer while facilitating
BOTTOM RIGHT The circulation and
reference desks are consolidated in a
central location for more efficient and
flexible use of staff. D