Defined by a bold sculptural form and striking glass façade, Linea is a 33-story tower that creates new residential concentration in Chicago’s Loop. The 265-unit building transforms its mid-block site, formerly a parking garage next to the elevated train, improving the public realm. The 364,000 SF structure is purposely set back from the street and massed below the maximum size allowed by zoning – 40,000 SF less -- to provide air and light to the street and neighboring buildings. Green aluminum slab edge covers accentuate each floor, giving the façade a textured rhythm. A modern version of Chicago’s traditional bay windows, with sound attenuating glazing and shading, offers residents visual connection to the city beyond, yet privacy and interesting personal space within; this notable design element adds distinctive architectural presence, visual branding, and a sound buffer to the street.
Attracting urban professionals to its smaller sized units, the LEED Gold-designed project was designed with bespoke lobby furnishings, lighting, artwork, and amenities exceeding the norm. Exposed concrete columns and ceilings contrast with refined finishes. A 5th floor eco-garden covers parking below and gives green space to the residents. Social areas, wellness facilities, sundeck, and indoor pool are located on the top floors, typically reserved for lucrative penthouses, so that all residents can enjoy the best views. A colorful, sculptural steel stair connects the 32nd and 33rd amenity floors. At street level, a lighting display follows the footsteps of passers-by, further contributing to the vitality of the streetscape and neighboring businesses.
The 364,000 SF building, targeted as LEED Gold, has many energy efficient elements including bay windows on each elevation that provide sun-shading, and heat pumps that heat and cool the apartments. The window wall utilizes a high performance reflective double insulated glass to keep the exterior envelope tight, yet provides high quality day lighting in the living spaces.
The building also offers green “non-roof” covered parking, which reduces the heat island effect. Within the garage, there is also preferred parking available to those residence with low-emitting vehicles. For tenants without cars, the building offers a spacious bike storage room and is conveniently located near several means of public transportation. Linea features a water efficient landscape and features active and drought resistant vegetation in the outdoor spaces. Within the residential units, energy efficient LED lighting, low-flow water fixtures, regionally sourced materials, low VOC materials, recycled materials, and high efficiency glazing were all used. The building performance metrics include 32% energy use reduction by Efficient Measures, 28% carbon emissions reduction, 55% potable water use reduction, and 90% of construction waste was diverted from landfills.
Energy and carbon reduction strategies at Linea Apartments include improvements to thermal envelope, interior and exterior lighting power reductions, high-efficiency condensing boilers, hybrid water-source heat pumps, variable frequency drives (pumps and fans), demand control ventilation, self-shading bay windows, and a naturally ventilated enclosed garage. The predicted EUI in kBtu/sf/yr excluding on-site renewable energy contribution will be 83.0, the predicted EUI in kBtu/sf/yr including on-site renewable energy contribution (without carbon offsets) will also be 83.0, the predicted % regional energy reduction per Energy Star Target Finder will have a total percentage improvement over the baseline building design (ASHRAE 90.1-2007) at 30%.
All within a ½ mile radius, Linea has access to a variety of locations for daily errands, entertainment, education and public safety. These include Chipotle, Starbucks, the RiverWalk, Chase Bank, Walgreen’s, CVS Pharmacy, 7-Eleven, and Saint Peter’s Church. This building also has access to 10 bus routes, 10 railways, and a water taxi within the same ½ mile radius allowing for easy transit throughout the city. In the building, there are 145 parking spaces for a 265 units (.55 spaces/unit), which is the zoning minimum requirement. Linea has earned a WalkScore of 97.
The Linea project achieves storm water quality control by utilizing best management practices and green infrastructure treatment trains to treat 86% of the site. The site is completely covered by the building. There are two roof levels that are treated with three trains of BMP’s. Train 1 includes runoff from the Green Roof area at the lower roof deck. The runoff is then routed to catch basin at the ground level. Train 2 includes permeable pavement with an open graded stone. This runoff is routed through a catch basin at the ground level. Train 3 treats runoff from standard roof at the upper level and is treated by first BioClean BC-DF10 downspout system and then by running through a catch basin at the ground level. The afore-mentioned processes combine to provide a total suspended solids removal rate of 86%. 100% of rainwater is detained on the two roofs and slowly released to the city storm water sewage systems. 0% of the waste water is reused on site. The total calculated fixture regulated potable water use is 5050.0 kgal/year. From a baseline of 8,620.0 kgals, Linea has a 41% reduction of water use in all fixtures.
The following materials chosen all meet the allowable VOC content:
- All Flooring and Non-Flooring Adhesives & Sealants. All Interior paint, coating, primer, and sealers.
79.5% of the following products used have compliance with their listed certification standard:
- All indoor carpet meets the CRI Green Label Plus Standard
- All ceramic tile and Mineral-based flooring meet the CA Dept. of Health Standard
- Vinyl Flooring, Rubber wall base and Linoleum Flooring all meet the FloorScore Standard
Of the total 590 tons of construction waste, 531 tons were diverted from landfill, which is equivalent to 90.0%.