Simple Sustainability
Manasc constructed her penthouse in a city where the average low temperature in January is only 5 degrees Fahrenheit (-15 degrees Celsius). Her home, however, maintains a comfortable temperature as it's "primarily warmed by the waste heat generated by the floors below us and from the elevator machine room," she explains. Instead of piping waste heat out the building, in other words, the penthouse takes advantage of its strategic position on top of the building.
The penthouse has low heating requirements, Manasc says because the entire building is wrapped in high-performance, fiber glass-framed, triple glazed windows. "The penthouse also has a strict building envelope to minimize heat loss," she explains. The all-glass structure of the penthouse offers unparalleled views, while the fiberglass frames provide an extremely tight building envelope that is on par with passive house standards.
An electric, solar panel system also powers Manasc's penthouse. "We have 12 panels that are 300 watts each," Manasc explains. "While that is not a huge amount of energy, that was the space we had to work with (during the renovation)." Two small gas fireplaces provide offer supplemental heat on frigid days.
The penthouse also requires no mechanical air conditioning. Due to the relatively mild summers in Edmonton, the home's rooftop location allows Manasc to take advantage of the breezes moving through the city. "We just open the windows," she says. "We purposefully designed big doors and windows to take advantage of the cross breezes from the top of the building."
Challenges and Solutions
One of the biggest challenges Manasc faced when renovating the old mechanical room into her rooftop penthouse was getting building materials up to the top of the building. "We didn't have a big power crane, so there were a lot of logistics to get materials up here," she says. "Once we were able to get things up here, it was a relatively easy place to build."
Manasc has used her extensive experience with sustainable building technologies and techniques to design research facilities, workplaces, government buildings, health centers, schools, coffee shops and cafes, and college and single-family residences in collaboration with her firm. Recognized as one of the country's top sustainable architects, she is a Canada Green Building Council director and a founding member of the Sustainable Buildings Symposium. She is also co-author of the book Agora Borealis: Engaging in Sustainable Architecture.
In their article "Deconstruction Over Demolition: Manasc Isaac Architects," authors David Campbell, Dana Dusterhoft, and Jonathon Schell wrote that," Everyday activism is a topic that encompasses a variety of sustainable processes and behaviors like turning off lights in a room that is not in use or turning off water taps while brushing teeth, but also challenging large-scale projects. This sentiment has been embraced by Manasc Isaac, an Edmonton, Alberta-based architectural firm with a focus on sustainable design."
As for homeowners interested in renovating an older home to achieve greater energy efficiency and incorporate more sustainability, Manasc suggests starting with examining current windows. "Whether you chose wood or fiberglass frames, opting for triple glazed windows is important for residential homes," she says. "Having good daylight reduces the need for electricity. In our case, we use minimal artificial lighting." In her penthouse, "Our windows offer us excellent views, a naturally bright interior, while still allowing us to stay efficient."
Manasc recommends that homeowners consider the orientation of their homes to take advantage of passive solar heating. "If you can, make sure you have good shading on the west and south faces of your home. Orientate your house so that it takes advantage of the sun. Especially in our climate, you also definitely want well-insulated walls, including the foundation walls down to the basement."
Manasc also recommends including a radiant heating option as part of a sustainable upgrade. "In-floor heating options are more comfortable and much more energy-efficient than forced-air heating systems," she says. In a climate like Edmonton, air conditioners are also unnecessary, with a design that focuses on reducing heat gain and maximizing summer shading. "Incorporating solar panels on a roof can also reduce heat gain," she adds.
We love to learn about these more sustainable homes. What makes this renovated penthouse even better is that it was once an unutilized space. Kudos to Manasc for spotting this opportunity!
