3.3.2. Part B: Application to Credits

A selection of 10 credits was applied according to the methodology to produce a draft of energy and environmental certification by achieving the minimum score necessary and minimizing the internal documents to achieve the highest possible score. This score and the consequent level of certification are integrated with the evaluation of other issues and credits by the design team.

In Ca' Rezzonico, the evaluation strategy was conducted considering the requests of the museum administration, who had expressed the desire to evaluate some specific aspect such as the energy efficiency and management, the internal lighting quality, and the ventilation system. These requests were consistent with what is expressed in the documentation necessary for the selection of the 10 credits, as previously described in Figure 4.

The information in Table 7 focuses on the application of 10 credits in the case study. The administration of the museum will have to apply some specific requirements (highlighted in red) to obtain validation and achieve certification. According to the case study characteristics, a preview showed the museum could earn 47 points toward LEED O+M certification. In detail Table 7 shows the credits and what their characteristics and documentation are [42].

EQ c2, Enhanced Indoor Air Quality Strategies: the intent is to ensure better indoor air quality for users' productivity, well-being, and comfort. The requests include permanent installations (such as slotted systems and grilles). Currently Ca' Rezzonico does not have such systems.

EA c4, Optimize Energy Performance: the intent is to increase the energy performance beyond the prerequisite standard for reducing economic and environmental problems in relation to the unnecessary use of energy. The requirements include a demonstration of continuous energy efficiency improvement during the performance period in comparison to a baseline, and Ca' Rezzonico has an energy use 43% lower with respect to similar buildings in terms of typology, use, and characteristics.

EQ c1, Indoor Air Quality Management Program: the intent is to maintain users' well-being by modifying and preventing indoor air quality problems. The requirement includes conducting an I-BEAM audit on a regular basis and revising the IAQ management program.

EA c7, Renewable Energy Carbon Offsets: the intent is to reduce greenhouse gas (GHG) emissions through the use of local and grid-source renewable energy technologies and carbon mitigation projects. The requirements include a demonstration that renewable energy systems determine the total energy use or the engagement of contracts to purchase carbon offsets, green power, or Renewable Energy Certificates (RECs) as the annual renewal of the energy supply contract for Ca' Rezzonico.

LT c1, Alternative Transportation: the intent is to reduce pollution and land development effects from automobile use for transportation. Alternative transportation strategies that contribute to this reduction include human-powered transport (e.g., walking or biking), public transit, telecommuting, informal transit options, compressed workweeks, carpooling, and green vehicles. For Ca' Rezzonico, the credit is achievable as for all buildings on the Venice isle.

**Table 7.** Analysis of the 10 selected credits in Figure 4 in application to the case study. The requests of Ca' Rezzonico management are highlighted in red color, the already requests are in black. The score obtainable is listed, compared with the maximum achievable with the LEED O+M rating system.


EQ c4, Interior Lighting: the intent is to improve occupants' well-being, comfort, and productivity through the provision of high-quality lighting. The requirements include an analysis of the quality of light control system. Currently, for the case study, only some changes to lighting consumption were possible because the requirements for by this credit are constrained by the Superintendent.

MR c3, Purchasing—Facility Maintenance and Renovation: the intent is to reduce the environmental harm due to the materials used in building renovations. The requirement includes purchasing at least 50%, by cost, of the total maintenance and renovation materials that meet at least one of the criteria of being recyclable, reusable, bio-based, cradle-to-cradle certification, and low emissions of volatile organic compounds. In this case, Ca' Rezzonico is a building listed by the Superintendent, so the requirements for renovation and credit will have to be analyzed more in-depth in accordance with the various stakeholders, even if no particular difficulties have yet been detected.

WE c1, Outdoor Water Use Reduction: the intent is to reduce outdoor water consumption. The requirement is reducing the project's landscape water requirement (LWR) by at least 50% from the calculated baseline for the site's peak water use month. Reductions must first be achieved through plant species selection and irrigation system efficiency as calculated in the Environmental Protection Agency (EPA) Water, Sense Water Budget Tool. The museum administration is active in monitoring and validating the consumption reduction.

SS c1, Site Development—Protect or Restore Habitat: the intent is to maintain existing natural areas and restore damaged areas for habitat provision and biodiversity promotion. The requirement is the coverage by vegetation (adapted or in place native) of a minimum area during the performance period. Another option, effectively chosen for the case study, is the provision of financial support equivalent to at least USD \$4 per square meter for the total site area (including the building footprint), to a nationally- or locally-recognized land trust or conservation organization within the same EPA Level III ecoregion or the project's state.

SS c4, Light Pollution Reduction: the intent is to minimize the light escaping from the site and building, by reducing sky-glow, improving night sky access, enhancing the night-time visibility, and reducing the impact from lighting on nocturnal environments. The requirement includes the use of an external shading device or reducing the measured illuminance level of external lights by 20% compared with lights off. In the case study, this second option is achievable due the installation of external light pointed only on the main external surface of the building.
