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Tag: Certification Station

Pirelli Historic Retrofit: Part 1

 

image of Pirelli buildingOne of the most important drivers in achieving Passive House certification (or achieving any goal!) is getting the project team involved from the start. Becker + Becker, the owner, architect and developer for the creative retrofit of the Pirelli Building, hired SWA’s Passive House, LEED, and Enclosures teams to coordinate during early design. Becker +Becker is invested in rebuilding for resilience, sustainability, and occupant health and comfort and appreciates the necessity of getting goals defined at the outset.

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Leveraging LEED for New Construction Post-COVID Part 2

LEED: Toolkit for a Healthy and Resilient Post-COVID Built Environment

At SWA, we have used LEED across a wide range of projects and contexts. We have seen firsthand its strength as an adaptable toolkit for guiding high performance building design, construction, and operation. The intent of each LEED credit category takes on a particular meaning, both locally and globally, in response to the emergence of such factors as global climate change and its associated consequences—including pandemics. In the post-COVID context, these intents will take on new meaning and new urgency. Read Part 1 of this blog here!

image of coal plant

Credit: Arnold Paul | Wikimedia Commons

The overall goal of the LEED rating system is to reduce the negative impacts of the built environment on environmental and human health. Ideally, this focus contributes to our general, overall resilience to public health crises such as the COVID-19 pandemic by reducing and mitigating various factors that make us more vulnerable to diseases. For example, we know that long-term exposure to air pollution and poor air quality dramatically increases the chances of dying from COVID-19 and that most of the same pre-existing conditions that increase the risk of death for COVID-19 are the same diseases exacerbated by exposure to air pollution. Anything we can do to improve air quality will also improve our resilience to disease. Most significantly, we need to move away from fossil fuel-based energy and toward clean, renewable energy—and a large portion of LEED is focused on doing just that.

As researchers have noted, many of the root causes behind climate change also contribute to a greater risk of pandemics. An example is deforestation and associated habitat loss, which forces wildlife to migrate, bringing novel viruses into closer contact with livestock and humans, and increasing the odds of disease transmission. On top of that, by altering temperature and rainfall patterns, climate change has created conditions that are more conducive to the spread of disease in general. So, the strategies we need to enact now to address the climate crisis—many of which are addressed in LEED credits—can also mitigate the occurrence, scale, and impacts of future disease outbreaks.

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Passive House: An Alternative Compliance Path to Toronto Green Standard Tier 3

It is clear to see that the Passive House (PH) standard is here to stay! Across North America, more States, Provinces, and Municipalities are integrating PH into their building standards. One of the more recent adopters is the City of Toronto. In the most recent version of the Toronto Green Standard (TGS), the PH standard is offered as an alternative compliance path to TGS Tier 3, and with this alternative compliance path one obvious question comes to mind: What is the major difference in required component efficiency for a multifamily building in Toronto that is looking to meet either the PH standard or TGS Tier 3?

The PH standard is performance-based and is focused on decreasing whole building energy demand, improving building durability, providing optimal occupant thermal comfort, improving indoor air quality, and reducing carbon emissions. The PH standard reduces building operation costs, decreases carbon emissions, and supports an improved indoor environmental quality for building occupants. The TGS has similar goals and benefits when compared to the PH standard, and there are some obvious synergies in the program design between TGS and PH. The tiered energy category in the TGS takes a similar approach to PH by offering an annual budget for three different categories. For PH you must comply with a total energy budget for annual heating demand, annual cooling demand, and total source energy use intensity. Similarly, but slightly differently, the TGS offers a budget for total site energy use intensity (TEUI), annual heating demand or Thermal Energy Demand Intensity (TEDI), and the additional category of Greenhouse Gas Intensity (GHGI). In both standards, the path to compliance is non-prescriptive and designers can implement a variety of component efficiencies and system options. See table 1 and 2 below:

 

passive house standard criteria data

Table 1: International Passive House Standard energy criteria

passive house standard criteria data

Table 2: Toronto Green Standard Tier 3 energy criteria

 

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The First Certified Passive House in Southeast Asia – Star Garments Innovation Center

Following up on our blog post in August 2018 – Just Your Typical Blower Door Test… in Sri Lanka – Star Garment Innovation Center – we have exciting news coming out of Sri Lanka. The Star Garments Innovation Center is now officially certified as a Pilot EnerPHit building, the building retrofit standard under the Passive House Institute (PHI).

EnerPHit logo with project details

EnerPHit certification for this project is a milestone achievement on many levels. The Innovation Center is now the first certified Passive House in Southeast Asia and one of only a handful of certified PH projects in tropical climates. PHI deemed the project “a milestone in industrial energy efficient retrofitting in a tropical monsoon climate.” Many of the passive measures employed at the Innovation Center, including continuous exterior insulation, highly efficienct windows, variable refrigerant flow heat pumps for cooling with wrap around heat pipe for enhanced dehumidification capacity, and balanced ventilation with heat recovery can be utilized across all future construction projects in tropical climates. The Passive House team here at SWA is excited to see the potential growth in tropical-climate Passive House construction as a result of the Innovation Center’s success.

But what good is certification if the building doesn’t perform as well as the energy model predicts? Well, we have exciting news on this front too!

At the very start of SWA’s involvement in the project back in the summer of 2016, SWA conducted a utility analysis of the base building prior to any renovations to predict and later verify the energy savings of the Innovation Center by designing to the PH standard. Once the energy model was developed, SWA predicted approximately 50% in energy savings when compared to the previous building’s energy bills.

Fast forward to Fall of 2018 and the building has now been occupied for a full year. The two inevitable questions are:

  1. How much energy is the Innovation Center saving as compared to the previous building?
  2. How does the modeled energy use for the Innovation Center compare to what it is actually using after a full year of occupancy?

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The Top 10 Party Walls Posts of 2018!

2018 has been a year to remember for SWA’s Party Walls blog. Our consultants have shared their passion for high performance buildings by recounting stories from the field and providing information, new findings, and best practices to improve the built environment.

Whether discussing topics based in New York City or Southeast Asia, here are our fan favorites from 2018…

Collage of blog images

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Multifamily Green Building Certification Program Comparison

If you’re designing and constructing multifamily buildings, chances are you’ve run into one of the many green building certification programs. Whether mandated by code, tax credits, your loan, or because you want to improve building performance, the differences between programs can be difficult to understand. One of the most frequent questions we help design teams answer is “which multifamily green building program should we choose?”

To help shed some light on the major green building standards, we’ve outlined some of the most important requirements for multifamily building performance that tend to differentiate the programs the most.

ENERGY STAR

Administered by the U.S. Environmental Protection Agency, ENERGY STAR is a free program that includes envelope, mechanical, and moisture management requirements. There are two pathways to certification – ENERGY STAR Certified Homes and ENERGY STAR Multifamily High-rise – based on the height of the building. In the near future these programs will merge into one Multifamily New Construction standard.

Although it isn’t considered a full green building program (it doesn’t address materials, site or water), ENERGY STAR is included in this comparison because several programs and standards reference it as a base requirement.

Energy Star comparison chart (more…)

Just Your Typical Blower Door Test… in Sri Lanka – Star Garment Innovation Center

As the number of projects pursuing Passive House certification increases, so does the demand for whole building blower door tests. And so, performance of recent blower door tests took us to uncharted territory, not only for SWA, but for the Passive House Standard.

Rendering of Star Garment Facility

 

Working remotely with a project team across the globe, the Passive House team at SWA was tasked with retrofitting an outdated factory in Katunayake, Sri Lanka, into a Passive House certified garment manufacturing facility. Jordan Parnass Digital Architecture (JPDA) recruited SWA to provide technical assistance to the project team. Responsibilities for this project included Passive House design analysis and recommendations, mechanical design review, energy and thermal bridging modeling, and the testing and verification necessary to achieve certification from the Passive House Institute (PHI).

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Delos Headquarters Raises the Bar for Healthy Buildings

A team of SWA consultants recently had the opportunity to tour the newly constructed Delos Office Headquarters, located in the Meatpacking District of New York City. The office, which occupies the fourth and fifth floors of a ten-story building adjacent to the High Line, has obtained WELL Platinum certification through the International WELL Building Institute (IWBI), Petal Certification through the Living Building Challenge, and is currently pursuing LEED v4 Platinum certification through the US Green Building Council (USGBC). From the inception of the tour, it was clear that the space had exceeded the expectations of these certifications, and more.

Overview

Delos entrance with monitor and greenwall

Beside the entrance, a monitor displays live building stats and company announcements

Stepping off the elevator, occupants walk over a large metal grate designed to remove debris from shoes, preventing dirt and other particles from contaminating the floor. Then, upon entering the office, visitors are immediately greeted with an abundance of natural light and sense of biophilia. The office is enclosed by large glass curtain walls and filled with an array of plant life. Next to the entrance, a large monitor displays office conditions, such as temperature, humidity, carbon dioxide, and other levels affecting tenant comfort.

The main office area is largely free address, which means employees can freely move to where they feel most comfortable. Each desk is adjustable and includes a monitor, a temperature adjustable task light, and many other utilities that foster productivity. There are greenwalls placed throughout the office (22 to be exact), which are used to purify the air. Clean air is also distributed through floor diffusers and dirty air is removed through the ceiling. Additionally, it is noticeably quiet in the office; the mechanical systems are well insulated and there is a low level white noise sound masking system that lessens harsh noises.  (more…)

Pathways to Passive House Certification

Passive House logosDid you know that there are two pathways for earning Passive House certification? There’s Passive House International (PHI) and Passive House Institute US (PHIUS). Using an energy modeling software, both programs evaluate a building based on a variety of factors. Despite the misleading moniker, certification is not limited to just housing. In fact, building types from residential and commercial high-rises to industrial factories have earned Passive House certification around the globe. However, the two certification programs are run by separate institutions, using different energy modeling software and standards. However, both ultimately maintain the shared goal for high performance, low energy buildings.

Historically, around 2013, the PHIUS organization developed a new standard called PHIUS+ 2015 with a climate-specific approach and an alternate modeling software. Starting in March 2019, PHIUS projects will be held to updated requirements under the PHIUS+ 2018 program.

PHI also offers project and climate specific cooling demand thresholds, having previously begun offering alternate certification options in 2015. Additionally, PHI created a program called EnerPHit to provide more flexibility for retrofits. PHI recognizes buildings that exceed its standard certification by offering Plus and Premium certification, as well as a Low Energy Building certification pathway for projects that are near PH efficiency.

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LEED v4.1 O+M is All-In!

Are you in? The US Green Building Council (USGBC) wants you to be. The “All-in” campaign has just officially expanded to include the new and highly anticipated LEED v4.1 for Building Operations and Maintenance (O+M).

Full disclosure: As a member of the Energy and Atmosphere (EA) Technical Advisory Group, I was involved in reviewing LEED v4.1 modifications. In the past, LEED had set significant barriers to entry for existing buildings. For example, LEED O+M EA Prerequisite Minimum Energy Performance set a baseline ENERGY STAR score of 75, which restricted certification to the top 25% of efficient buildings. This limitation often caused building owners to abandon LEED before even getting started, thus eliminating a key incentive for improving underperforming buildings’ environmental impact. LEED 4.1 has fixed this problem. The restrictive prerequisite for energy performance has been replaced with a voluntary credit, encouraging building owners to benchmark energy use and screen capital improvements against energy impacts.

The newest version of LEED O+M also incorporates Arc, USGBC’s performance tracking platform. In Version 4.1, the energy score is calculated based on two energy metrics:

  1. LEED v4 ImageThe traditional ENERGY STAR metric of annual Source Energy Use Intensity (kBtu/sf);
  2. The Arc metric of Annual Greenhouse Gas Emissions Intensity (GHG/person).

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