Can an energy plus house produce more energy than it consumes?
What is an energy plus house, also known as a plus energy house?
A passive house usually consumes slightly more energy than it generates. A zero or zero-energy house generates as much energy over a whole year as it consumes. An energy-plus house goes one step further!
An energy + house, generates more energy than it consumes. Among other things, it has large windows that provide lots of natural light, a heat pump and a roof fitted with solar panels and solar water heaters. The large stone walls in the house ensures that the temperature can remain as stable as possible. Clay finishing regulates the humidity. On the roof they’ve used paper insulation + a green roof filled with plants for extra insulation. Of course a house like this needs an excellent building envelope.
The basis for this energy-plus house is a solid passive house. Right from the design stage, a great deal of attention was paid to a compact construction, thorough insulation and air tightness, an appropriate orientation, judicious use of glass panes, a sophisticated ventilation and heating system with heat recovery and optimum use of solar energy.
Energy-producing homes, that is what we will be moving towards when it comes to building in the future. The industry is also investigating the possible techniques. Many building professionals believe that in the future, homes will no longer be energy consumers, but energy producers.
An Energy Plus home is based on two basic principles: on the one hand, a minimum energy demand, through insulation and innovative energy-saving techniques such as heat recovery and the like, and on the other hand, maximum use of free solar energy.
The optimally insulated home of energy + residential construction is equipped with, among other things, a solar water heating system, a geothermal heat pump and all this in an airtight finish. Energy efficiency is key in this way of sustainable home building.
Video production by https://mindfulbuildingandliving.com/
Next in Sustainable Design: Bringing the Weather Indoors
Content sourced from The Conversation.
A building’s primary purpose may be to keep the weather out, but most do such an effective job of this that they also inadvertently deprive us of contact with two key requirements for our well-being and effectiveness: nature and change.
In the 1950s Donald Hebb’s Arousal Theory established that people need a degree of changing sensory stimulation in order to remain fully attentive. And 30 years later, landmark research by health care designer Roger Ulrich showed that hospital patients in rooms with views of nature had lower stress levels and recovered more quickly than patients whose rooms looked out at a brick wall.
Unfortunately, many buildings – especially in cities – are not blessed with green surroundings. I am part of a group of architects and psychologists at the University of Oregon that has been examining ways to overcome this problem using an aspect of nature available anywhere: the weather. Think of rippling sunlight reflecting from water onto the underside of a boat, or the dappled shadows from foliage swaying in a breeze. Other examples can be seen at vitalarchitecture.org.
When we brought these kinds of natural movements indoors, we found that they reduced heart rates and were less distracting than similar, artificially generated movement. Early results suggest that seeing live natural movement of this kind in an indoor space may be more beneficial than viewing outdoor nature through a window, and could not only help to keep us calm but also improve our attention.live natural movement of this kind in an indoor space may be more beneficial than viewing outdoor nature through a window, and could not only help to keep us calm but also improve our attention.
These findings are consistent with the Attention Restoration Theory proposed by University of Michigan psychologists psychologists Rachel and Stephen Kaplan. Among other things, their work suggests that familiar natural movement patterns of this kind have the capacity to keep us alert without being distracting.
Beyond green building
Over the last two decades architects and engineers have developed approaches to building design that greatly reduce the impact of buildings on the natural environment (“green” buildings) and their human occupants (“healthy” buildings). But these movements focus primarily on new buildings, which benefit only a relatively small number of people compared to the many who could be helped by making existing structures more habitable.
Moreover, most people – including many of those responsible for ordering the construction and remodeling of buildings – are not aware of these advances. Many key features of green buildings, such as energy and water conservation, for example, are not immediately noticeable, and as a result, these simple but important practices are significantly underused.
Several leading commentators on sustainable design, including Judith Heerwegan and the late Stephen Kellert, have suggested that in order to have any meaningful impact on the daunting environmental problems we now face, green buildings can no longer simply “do no harm.” Rather, they argue that buildings need to actively demonstrate ways of living in harmony with nature. Our work suggests that bringing the movements of sunlight, wind and rain indoors could make passive energy-saving features in buildings more obvious to the people who order and occupy them, and so greatly increase their usage.
Bringing the weather indoors
Light shelves, for example, are devices that are commonly retrofitted to the windows of existing buildings to reflect daylight deeper into an interior. Former University of Oregon master’s degree student Aaron Weiss and I have shown that when a shallow layer of water is added to the top of a light shelf and is disturbed by the wind, the shelf reflects moving sunlight patterns onto the ceiling inside.
In controlled experiments using a windowless room, with a fan and powerful light to represent the wind and sun, we found that this kind of wind-animated light not only lowered occupants’ heart rates but was also less distracting than similar, artificially generated moving patterns. Importantly, adding wind movement did not reduce the amount of light the shelves transmitted. However, it did make the shelves much more visible to people using the space.
We found the same was true of a range of other key passive energy-saving techniques, including solar heating, shading and natural ventilation. Adding sun, wind or rain-generated movement did not reduce their environmental performance, and in many cases it revealed their operation to those using the building.
The calming effects of natural indoor animation could be particularly helpful in stressful locations, such as hospitals and doctors’ offices – especially in places where people experience the additional stress of waiting. Aquariums are often used in medical waiting rooms, for example, because they have been found to have a calming effect on patients. The stress reduction can be even greater, however, when indoor movement comes from uncontrolled nature such as the weather.
But how can we invite the movements of the elements indoors without undermining a building’s first task – sheltering us from the weather? There are three simple ways. We can enclose weather-generated movement in glass courtyards; use sunlight to project movement from outdoors onto interior surfaces; or project it onto the outside of translucent materials, such as obscured glass.
No real substitute for live nature
There are many kinds of recorded natural phenomena available today. We can watch videos of gently rolling ocean waves, or fall asleep to the recorded sounds of falling rain. There are even sophisticated software programs that can generate these effects digitally. So why go to the trouble of redesigning buildings to bring these effects indoors?
To answer this question, former University of Oregon graduate student Jeffrey Stattler and I projected a digital tree shadow onto the wall of a windowless room and tested whether there was any difference in people’s responses depending on whether the electronic tree moved with live changes in the wind outside, or according to a computer program.
Most people could not tell whether the tree movements were generated by the wind or by computer. But when they believed the movement was wind-generated, their assessments of its beneficial effects were significantly higher in all categories.
In other words, indoor sensory change is likely to have a much greater beneficial effect on us when we think it is natural and live. So unless we are prepared to mislead people, there is no real substitute for using the real thing.
According to the Environmental Protection Agency, most people in the United States now spend more than 90 percent of their lives inside buildings. Features that make us more relaxed and productive in those indoor environments, then, could have significant positive effects on a great many lives.
Lighting, heating and cooling those buildings accounts for almost 40 percent of U.S. energy consumption. The same natural indoor animation effects could also help to reduce that figure by increasing public awareness of passive energy-saving in buildings.
In addition to its practical benefits for people and the environment, weather-generated indoor animation also shows us that, while separating us from its extremes, buildings can also reconnect us with nature.
Ventilation, air quality, thermal health and moisture lead the Harvard School of Public Health's list of what makes a healthy building.
In the interest of defining their terms and presenting their research in a way that audiences outside academia can understand and incorporate into their work, the Healthy Buildings team have released an exhaustive list that details the simple foundations of making a building healthy.
One of the top trends in kitchen design is the move towards furniture-style cabinetry. The kitchen is now integrated as the hub of the home and designed as an inviting space the whole family can enjoy, rather than just a functional area alone. A great way to corporate this idea into your own kitchen is through an island bench. When designing an island bench it’s important to ensure it will fit your space and suit your needs perfectly. Add a warm homely feel to your kitchen by using a thick stone benchtop or create a feeling of space with a thin stone top and shadow line.
While the kitchen is becoming both a gathering and entertaining space, the Butler’s Pantry is an essential element to keep clutter out of sight. Whether your preference is for a luxury pantry or a full preparation kitchen, keeping your central kitchen minimal, stress free and a place that can be seen as an entertaining area is the key. A ventilation/purification system is also essential for this space which will provide fresh, filtered air; use an HRV-leading nanofiber filter for the purest possible environment for your family and guests.
Industrial style taps are on trend reflecting those of a professional chef’s kitchen. Home water purification systems are also a focus, giving you complete control of the purity of your water on every tap in your home. Clever design and innovative technologies have made it easier to integrate these essential items into the design.
At Natura Homes we have a range of home designs that feature kitchens in keeping with the latest design trends. We carefully monitor prevailing trends from all corners of the globe to ensure the kitchens in our homes are on trend, both today and in the future. Talk to our specialist designers today about your new Natura home.
