Sustainable Design in Residential Home Design
Green isn’t a buzzword. In our business practice and in our profession, sustainable design is a basic criteria. Edict advances sustainability as a requirement throughout the planning and design process on all of our projects. We firmly believe that saving energy and resources is not only good for the environment, but also good for business.
We promote an integrated approach to sustainable design; employing interdisciplinary team of engineers and designers to explore and evaluate potential green design opportunities from the earliest planning stages, when clients agree to its use.
Passive Heating and cooling:
Arguably the most important aspect in creating a green home is designing a home that uses as few natural resources as possible. A key component is reducing energy use through passive heating and cooling. We use 3d modeling to take the guesswork out of passive design solutions. 3d modeling calculates a home’s energy loss, energy use and heat gain. This provides us with direct feedback to determine the best placement of windows and type of glazing, the amount and type of insulation used, the size of overhangs, and the selection of a heating and cooling systems. In general, passive heating and cooling techniques are economical, and get the most bang for your buck in achieving a low energy use home. Here are some basics in passive heating and cooling techniques to consider:
Insulation and Air Infiltration:
As a rule of thumb, relatively inexpensive items such as insulation and sealing go the furthest in reducing the amount of energy loss or gain. Insulation technology has come a long way and sealing up potential air leaks through joints in the construction is critical. Foam insulation provides a much better thermal performance than batt insulation and reduces air infiltration. Smart designs also seal up energy gaps that are often overlooked, such as rim joist insulation, insulation at the foundation wall, and under basement slabs.
Good windows and glazing options have significantly advanced in the last 20 years. In fact, there are many options allowing us to select different glazing based upon the window’s size and location in the home. For example, on the east and west you want to limit the amount of solar heat gain – while on the south, you may want to allow some solar heat gain for passive heating in the winter. Basic passive design knowledge, combined with 3d modeling helps us determine which is the right glazing for a given location.
Roof overhangs, awnings and other shading devises:
These are particularly successful on the south windows where you want to reduce the heat gain in the summer, but allow for heat gain in the winter. Our 3d models combined with the energy modeling can determine the precise size of overhang required to optimize summer shade and winter heat gain.
It is best to orientate the house so the largest mass and windows are located on the south and north.
Passive heat gain:
We find that in our climate it is as critical to control the unwanted heat gain as it is to provide heat in the winter. A careful balance between desired heat gain in the winter with unwanted heat in the summer needs to be met. Well-placed internal thermal masses – such as concrete floors or stonewalls, combined with the right type of glazing and external shading can work well.
The stack effect:
Natural ventilation and air movement can be achieved by the stack affect. In the warmer months, hot air rises to a high point in the structure to open windows or other ventilation. The warm air rising reduces pressure in the lower portion of the building thereby drawing cool air in at the lower levels. Active ventilation as simple as well placed operable windows can cool down the house at night and keep it cool in the day.
Other means to reduce energy use:
High efficiency and energy star appliances
Reduced lighting, lighting on dimmers or controls
Edict can employ any or all of these sustainable strategies on any new build, remodel, or renovation project we undertake for you as part of the design and construction. Sustainable methods save you money in the end and most importantly, help to keep our planet clean and viable.