Located in the heart of University of Ottawa, the 15-story Vanier Hall functions as the new home of the large Faculty of Social Science and ‘stands tall’ as a living example of sustainable design boasting the intangibles of a rich and inspiring learning atmosphere, plus the measurable returns of energy saving technology.
From an exterior view, the green plant wall provides a striking contrast to the glass and steel structure. Once inside, visitors can fully appreciate a spectacular six-story-high feature – the largest living wall biofilter in North America at 1,370 square feet. In addition to the aesthetic impact, the biofilter is also part of the building’s sustainable design efforts.
Improves Air Quality and Building Performance
In simple terms, a Nedlaw Living Wall Biofilter is a working machine that harnesses nature’s remarkable ability to ‘eat’ pollutants. Contaminated indoor air is drawn through the biofilter where microorganisms on the root media consume airborne pollutants as food. This removal process cleans 80 – 85% of volatile organic compounds (VOCs) from the air, creating virtual outside air. The cleansed air is then re-circulated through the buidling’s HVAC system.
The ‘soft’ benefits of the living wall include dust control, sound abatement, white noise in the form of running water, and a noticeable ‘smell’ of fresh air.
In terms of improving building performance, the biofilter at Vanier Hall can provide 75 – 80% of the building’s fresh air intake requirement, which not only enhances air quality but also significantly improves energy performance by reducing the amount of air intake and, consequently, heating and cooling costs. Additionally, the wall provides all of the building’s humidity and no mechanical humidification is needed.
The living wall biofilter at Vanier Hall includes energy smart features designed to address certain energy lapses in traditional building systems. For example, water recycled from storm water runoff and HVAC condensation is used for the hydroponic plant wall. According to Dr. Alan Darlington (founder of Nedlaw Living Walls), “We’ve done a lot of work to streamline and make this as efficient as possible without losing the aesthetics of this system.”
Calculating the ROI of Living Wall Biofilters
In recent years, Nedlaw has completed numerous studies to show the effectiveness of contaminant removal from indoor air and has now quantified the return on investment based on energy savings. By replacing outdoor air that needs to be conditioned, a Nedlaw Living Wall Biofilter reduces a building’s energy needs. In general terms, a fully-integrated biofilter can reduce energy costs by up to 30%, because the biofilters provide clean air at a fraction of the cost of traditional systems.
In a recent study completed for a major international retail chain, it was determined that the proposed living wall biofilter could provide 100 litres per second of outside air – meaning the building needed to take in that much less outside air.
Using the biofilter as a source of clean air would reduce the energy consumption of the HVAC system by 32.5 GJ of energy for square metre of biofilter used. If properly integrated into the building (for example, naturally lit and connected directly to the HVAC), the biofilter would require as little as 0.4 GJ of energy per square metre per year. This gives a total annual energy savings of the system of 32.1 GJ. This is equivalent to roughly 5 barrels of oil or 1.6 tonnes of CO2 saved per square metre of biofilter.
For this study, it was determined that approximately 400 m2 of biofilter would be used. Assuming a combined energy cost for electricity and natural gas of $10 USD per GJ and if the biofilter is used to its maximum potential then the payback period for the capital cost associated with the biofilter could be less than 3 - 5 years.
PROJECT DETAILS
Location: University of Ottawa, Vanier Hall
Architect: Diamond Schmitt Architects, KWC Architects
Award of Excellence / Interior Green Wall - Green Roofs for Healthy Cities
LEED Gold Certified
MEDIA COVERAGE
University of Ottawa Tower Wins 3 Awards
ABOUT NEDLAW LIVING WALL BIOFILTERS
Related Stories
Multifamily Housing | Apr 20, 2022
A Frankfurt tower gives residents greenery-framed views
In Frankfurt, Germany, the 27-floor EDEN tower boasts an exterior “living wall system”: 186,000 plants that cover about 20 percent of the building’s facade.
Wood | Apr 13, 2022
Mass timber: Multifamily’s next big building system
Mass timber construction experts offer advice on how to use prefabricated wood systems to help you reach for the heights with your next apartment or condominium project.
Modular Building | Mar 31, 2022
Rick Murdock’s dream multifamily housing factory
Modular housing leader Rick Murdock had a vision: Why not use robotic systems to automate the production of affordable modular housing? Now that vision is a reality.
Legislation | Mar 28, 2022
LEED Platinum office tower faces millions in fines due to New York’s Local Law 97
One Bryant Park, also known as the Bank of America Tower, in Manhattan faces an estimated $2.4 million in annual fines when New York City’s York’s Local Law 97 goes into effect.
Energy-Efficient Design | Mar 25, 2022
University of Pittsburgh Releases ‘Pitt Climate Action Plan’
The University of Pittsburgh has released the Pitt Climate Action Plan, detailing how the University will achieve its goal to go carbon neutral by 2037 through investments in clean energy, transportation, efficiency and other areas.
AEC Tech Innovation | Mar 9, 2022
Meet Emerge: WSP USA's new AEC tech incubator
Pooja Jain, WSP’s VP-Strategic Innovation, discusses the pilot programs her firm’s new incubator, Emerge, has initiated with four tech startup companies. Jain speaks with BD+C's John Caulfield about the four AEC tech firms to join Cohort 1 of the firm’s incubator.
Codes and Standards | Feb 18, 2022
Proposal would make all new buildings in Los Angeles carbon-neutral
Los Angeles may become the next large city to ban fossil fuels from new construction if legislation recently introduced in the city council becomes law.
Green | Jan 10, 2022
The future of regenerative building is performance-based
Why measuring performance results is so critical, but also easier said than done.
Sustainability | Oct 28, 2021
Reducing embodied carbon in construction, with sustainability leader Sarah King
Sustainability leader Sarah King explains how developers and contractors can use the new EC3 software tool to reduce embodied carbon in their buildings.
Green | Oct 6, 2021
My reaction to the UN IPCC Climate Change 2021 report: Ugh!
The recent report of the UN Intergovernmental Panel on Climate Change is not a happy read.
