Energy and Atmosphere: 21.5 points achieved out of 36 points available::
The overall goal of EA is to optimize energy performance of the building. We opted to follow the performance path which meant our world be rated according to the ENERGY STAR for home standards (the document can be found here). ENERGY STAR was simply the pre-requisite which everyone in LEED-H is required to meet; your points only begin to accumulate for exceptional energy performance. HERS stands for Home Energy Rating Standard and is based on a performance scale of 100. Based on a 100 point scale which is an average home, a home achieving HERS 85 is 15% more efficient. If you are familiar to the term NET ZERO, it is a similar scale, where NET ZERO means the home consumes zero percent more energy than it produces annually.
In our case, our preliminary HERS rating based on our building envelope leakage rate of less than 4%, our windows, our solar gain, our roof’s solar reflective index (SRI), our sprayfoam insulation, our geothermal HVAC system, and all of the design elements placed us at a HERS of 58, making our home 42% more efficient than an average home. This achieved us 19.5 points under EA 1. In addition we achieved 2 points for the efficient design of our hot water system which included compact plumbing runs achieved thorugh back-to-back bathrooms and a superheater added to our hot water tanks.
Posted by KDL | follow me on Twitter: newscaster
Filed under: About the Home, Control, Energy, Good for the Planet, Green, Green Building, Green Electronics, Green Products, Household, LEED, Water | Tagged: atmosphere, Energy, eNERGY sTAR FOR HOME STANDARDS, Home energy rating standard, LEED-H, NET ZERO, solar reflective index | Leave a comment »