Quarterly CMFNH Newsletter – vol.1, ed.3 4th Quarter 2010
Energy News & Tech Tips. Project of the Quarter
Tech Tip: Modeling Mixed-Use Buildings Multi-family buildings are often designed as mixed-use and include such space-types as residential, retail, community room, office, and lobby. Because the lighting and mechanical system requirements for the Title 24 Building Energy Efficiency Standards (Title 24) differ for residential and nonresidential occupancies, the energy modeling of these buildings is more complicated.
Photo courtesy of Steve Proehl
Name: Armstrong Place Senior Housing City: San Francisco, California out Percent above 2005 Title 24: 27.0% Developer: BRIDGE Housing Corporation Energy Efficiency & Sustainable Measures: Solar hot water system Thermally efficient windows (low e-glass) Energy efficient lighting ENERGY STARÂŽ qualified appliances Photovoltaic system Roof water capture High efficiency irrigation Insulation with high R values Low VOC paints Management will provide residents with manuals for green maintenance Armstrong Place also participated in the LEED for Homes program, preliminarily earning Gold Certification. *The project completing within the current quarter exceeding Title 24 by the highest percentage will be considered Project of the Quarter.
Events & Trainings The CMFNH team would like to invite you to our Multi-Family Residential New Construction Training series. For descriptions and registration information, please visit our training page or contact Ashley Heath at 866-352-7457 or heath@h-m-g.com.
Under Title 24, the occupancy that comprises less than 20% of the total conditioned floor area can be modeled similarly to the major occupancy (envelope, HVAC, and water heating only). For example, if a residential multi-family building has 5,000 square feet of total conditioned floor area and a small recreation room of 950 square feet, the recreation room can be included in the simulation model because it is 19% of the total conditioned floor area of the building for Title 24 purposes. Because CMFNH provides incentives for residential dwelling units only, though, we typically require a project to remove the nonresidential portion(s) from the Title 24 model. This eliminates any influence (positive or negative) that the nonresidential spaces may have on the overall performance of the residential portion of the building and corresponding incentive amount. Every building is different and mixed-use buildings especially can pose some modeling challenges. Thus, we recommend that you contact us for assistance on mixed-use building types. We will work with you to ensure your project is modeled accurately and eligible for program benefits. For more information, contact Keith Sage at 916962-7001 or sage@h-m-g.com.