Mexico has long been a leader in LEED certification, it was recognized in 2019 to be the 8th country in gross square meter LEED certified projects[1] and has certified 232 projects since then (December 2020 to July 2021)[2]. It has been recognized to be a driver of increased rent/sale value, energy consumption savings, reduce maintenance cost, occupants comfort and to be environmentally friendly[3]. The importance of green building certifications, where LEED is the most applied worldwide, is to follow a holistic guideline and have weight the compliance from a recognized third party. Considering these factors why there is not more projects develop in our country? We believe it’s because of:
Please share your opinion below, your participation means a lot to us. References:
[1] U.S. Green Building Council releases 2019 Top 10 Countries and Regions for LEED, https://gbci.org/us-green-building-council-releases-2019-top-10-countries-and-regions-leed [2] Country Market Brief, https://www.usgbc.org/resources/country-market-brief [3] World Green Building Trends 2018 Smart Market Report, https://www.worldgbc.org/sites/default/files/World%20Green%20Building%20Trends%202018%20SMR%20FINAL%2010-11.pdf [4] La certificación LEED, ¿se apaga en México?, https://obras.expansion.mx/soluciones/2015/07/10/la-certificacion-leed-se-apaga-en-mexico
0 Comments
The architecture industry is evolving to be more integrated and focusing on reduced energy consumption and increasing occupant comfort. Our team has worked closely with OWN*, Environment Friendly Mexican Architecture firm, to improve their latest single-family project at conceptual design phase. Our objectives were to reach Net-Zero Energy, maximize daylight while minimizing glare and take advantage of natural ventilation for passive cooling. We perform analysis using a building energy model and CFD simulations. The site climate requires to reduce heating consumption in particular during the night and reduce cooling consumption at mid-day. The temperature is reaching lower temperatures in January, but it is quite constant through the year since the project is located in the north tropical region. We thus would need to reduce slightly solar gain at summer when the sun is at its zenith, this was achieved by adding light shelves that are required to minimize glaring and increase daylight penetration. The light shelves location to not interfere with glass door operation were placed above them, thus additional glazing was placed above the lights shelves. The additional glazing would also contribute, those openable, to increase the natural ventilation potential. However, the light shelves were not enough to reduce the glare enough, thus a glazing film that reduces the visual light transmittance to 17% in strategic locations. These strategies allow the increase in daylight from 34% sDA** to 76% sDA and reduce glare from 72% ASE*** to 25%ASE, all numbers are the weighted average for the occupied spaces. To study the heating/cooling demand and energy consumption we develop a reference building which is based on the IECC-Mexico 2016 and the NOM-020-ENER-2011. Per the client request we use Autoclaved Cellular Concrete blocks with 51mm Polystyrene insulation, double glazing and UPVC window framing. The reduced consumption from these measures was only 17% compared to the IECC reference. Thus, we implement in addition the use of instantaneous water heaters, LED interior and exterior lighting, daylight and presence sensors, EnergyStar home appliances, and outdoor air supply with heat recovery. Combining these approaches we reach savings of 52% in yearly energy consumption compared to the reference building. Finally, the software used permits the evaluation of photovoltaic system generation. This guided the change of the first floor roof angle center location to increase the south-oriented area in order to accommodate more solar panels. The change allows the number of solar panels to be double which was required to reach the net-zero threshold we were looking for. The roof change also opens a larger area in the north facade which benefits the natural ventilation performance. This would be discussed in a future article. Please share your opinion below, your participation means a lot to us.
* OWN, Architectural Firm with focus on balance between human and nature, www.thisisown.com/. ** sDA: Spatial Daylight Autonomy, measure defined in standard IES LM-83-2012. *** ASE: Annual Sunlight Exposure, measure defined in standard IES LM-83-2012. Tulum, Quintana Roo in Mexico is one of the most prized location for luxury and eco-friendly tourism. The demand and ROI for this city and the whole Riviera Maya region will keep growing and for real estate company to continue having success in the area the approach must change. Leader company of the industry (Los Amigos Tulum, GMB), business associations (COPARMEX Riviera Maya and ADIRM) and government institutions (General direction for Sustainable Tourism and Tulum City Hall) are already taking actions to push best practices among all players of the real estate industry. The key concept for all these people is sustainability, making our best to affect as less as possible the environment in the construction and operation of every real estate development. For investors be sustainable means added cost which may not be possible to profit of it especially if the competition is not pursuing the eco-friendly path. However, a sustainable development sells better, faster, at a higher price, and is cheaper to operate. This does not consist only on installing solar panels; a sustainable building take advantage of natural light, has efficient material to reduce the need for cooling/heating the indoors, are equipped with water savings fixtures, and even recuperate gray water for toilets and landscape irrigation.
There is not LEED certified building in Tulum and few in the state (ADO Terminal Chetumal and CityExpress/Suites Playa del Carmen). Choosing to pursue a certification in all their project is for leaders who aims for recognition of their practices on a global level. Tulum is an eco-friendly destination which could grow bigger while staying green if the actors of the real estate industry incorporate LEED certification as the standard for the region. Please share your opinion below, your participation means a lot to us.
Recommended additional content: LEED Luxury home in Silicon Valley World green building trends in technology World green building trend in wellness |
Suggest topicsWeekly our team select the most relevant topic of the industry to talk about. However, our readers' interests are even better. Archives
June 2021
Categories
All
|