Net Zero Homes
What makes a home net zero?
A net zero home generates at least as much energy as it consumes, so the net amount of energy it purchases from the grid is zero.
The net-zero concept is gaining popularity around the world as people become interested in homes that are more sustainable, comfortable, resilient, and cost effective.
For a home to be truly net zero, it needs to incorporate solar power or some form of renewable energy source. In order to maintain a net zero home, occupants must keep energy consumption low so that the home can generate enough power to meet their needs.
Net zero aspects:
Conservation is the "cheapest" form of energy production. It costs less to invest in conservation than it does to produce new energy.
Net zero homes are designed to be up to 80% more efficient than standard homes. Right from the start, they consume significantly less energy.
Homes should be situated to take advantage of warmth and light from the sun, known as passive heating.
They are built to be exceedingly airtight and incorporate balanced whole house ventilation systems and high insulation, which retains heat in the winter and keeps it out in summer.
Net zero homes can include high-efficiency mechanical systems, appliances, and other electrical devices to help lower energy usage.
Some elements of net zero homes...
Solar panels
Net zero homes are designed to be extra-efficient so they use as little energy as possible, including heating and cooling (often the largest energy consumers in homes).
In conventional homes, energy usage is usually higher than the amount of energy that could be generated by the number of solar panels that would fit on a roof or backyard. By lowering energy use as much as possible, a net zero home can supply all of its own energy with a more reasonable # of solar panels.
Passive solar
Solar photovoltaic panels are considered “active solar” because they generate electricity. Passive solar, on the other hand, takes into account the position of the sun to maximize natural heating and cooling. It’s “passive” because it doesn’t require machinery.
Whatever the climate, passive solar design uses appropriate shading to reduce summer overheating while allowing winter sun through to improve thermal heating.
Rainwater harvesting
Rainwater harvesting is the practice of collecting rainwater from a roof or any other hard surface and treating it for reusing in a home. With proper filtration & treatment, harvested rainwater can easily be used as potable water. It can also be used for non-potable uses like irrigation, toilet flushing, and vehicle washing. Using rainwater instead of municipal water will save you money, too.