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Net Zero Energy Buildings: The Future of Facilities
OTHER PARTS OF THIS ARTICLEPt. 1: This PagePt. 2: Net Zero Energy Buildings: How States Measure UpPt. 3: Net Zero Energy Buildings: Success Stories
Net zero energy may seem out of reach for many building owners and managers, but it’s no longer a niche trend. Whether it’s ground-up construction or an update to an existing building, there are countless sustainability measures that can be implemented to give a building its net zero energy designation. There are now net zero energy buildings in more than 44 states nationwide, totaling more than 45 million square feet of development. Between tax incentives, long-term energy savings and carbon emission reductions, these buildings offer a host of benefits for building owners, operators, and management. Yes, there can be a large upfront investment. However, net zero energy buildings cost very little to own and result in significant long-term savings.
What is net zero energy?
A building is considered net zero energy if it’s at least energy neutral, and ideally produces more energy than it uses through a combination of onsite generation and energy efficient measures. With energy making up about 30 percent of a facility’s operating costs, eliminating these emissions can have a significant impact on the environment and result in long-term savings for owners and operators.
On average, net zero energy verified buildings use 60 percent less energy than similar U.S. commercial buildings and 46 percent less than new buildings under California’s Title 24, one of the more stringent energy codes in the U.S. In addition to reducing expenses, lowering energy use can increase the building’s rental rates. By some estimates, this increase can be as much as 5 percent, leading to a significant bump in the overall building value.
For buildings that produce more energy than they need, excess energy can be sent to the grid to supply the community’s power needs. In addition to benefiting nearby residents, this can bring in additional revenue for building owners.
How to achieve net zero energy
The first step in creating a net zero energy building is to ensure energy efficient building materials, systems and appliances are used in the initial construction process. Examples include:
•LED lighting and movement sensors
•Optimized HVAC system (on average, buildings lose 10 percent of the energy they consume due to faulty HVAC systems)
•Design elements that keep daylighting in mind
•Glazing of the south and west sides of the building
The second step includes onsite renewable energy generation. Most often, buildings use wind, solar or hydro systems, or a combination or all three, but there are a wide variety of other generation methods to explore as well.
Net zero energy may sound cost prohibitive, but it doesn’t have to be. In addition to the energy cost savings, net zero energy and similar programs offer significant tax incentives. Incentives vary by state and may change over time, but the Database of State Incentives for Renewable & Efficiency is a great place to get more information about what is available in your area.
In addition to the tax savings, technology costs and implementation barriers are decreasing every year, and sustainability measures have become increasingly affordable to implement. For example:
•Solar power costs have decreased 63 percent over the past five years
•LED lighting costs decreased 90 percent from 2008 to 2015
•The cost of new lithium-ion battery packs has deceased about 73 percent since 2010
If net zero energy is too daunting of a goal to start with, the Leadership in Energy and Environmental Design (LEED) designation, which many building owners and operators have already secured or are in the process of pursuing, is a good place to start. LEED requirements have significant overlap with net zero energy, with 70 percent of net zero energy projects being LEED certified or registered. Simple step-by-step changes, such as installing low-flow toilets that use 1.6 gallons per flush versus traditional toilets’ 7-gallon usage, can help owners achieve LEED and eventually net zero energy through a phased approach too. Whether implementing all at once or over time as budget allows, LEED and net zero energy are much more cost-effective than many building owners and operators might think.
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