The performance option of going with a HERS rating to meet the 2015 IECC is all based on a numeric score, HERS score, where a 100 is equivalent to the 2006 IECC and a 0 is equivalent to a net-zero home.
What’s your perspective on this massive upgrade to the 2015 IECC?
- From the builder’s viewpoint, this method allows greater flexibility to deliver greater energy efficiency at a lower cost. Leading Builders of America estimated that a home that costs $3,000 extra to build for energy efficiency obtained through prescriptive methods only costs $1,300 for the same performance obtained by our proposed approach. An additional benefit for builders will be using an industry standard efficiency report to demonstrate code compliance.
- From the consumer’s perspective, this proposal provides substantial reductions in utility bills—about $300 a year for a typical house compared to the 2012 IECC or $850 compared to the 2006 IECC. In addition, it makes it likely that the rating will be provided to the buyer (since there is no cost to doing so), creating stronger markets for beyond-code homes, by clearly demonstrating their lower operating costs and providing guidance to the occupant on what their utility bills should be.
- From the viewpoint of compliance, a code official will now have an additional tool to verify compliance using this path: documentation of the energy rating score and of meeting the mandatory code provisions prepared by a certified third-party. The third-party verifiers will improve compliance because they are quality-checked on a random sample of their work. It can also be anticipated that they will disclose the results to the home’s occupants, providing another layer of verification. (http://www.resnet.us/blog/builders-and-efficiency-advocates-reach-2015-international-energy-conservation-code-change-agreement/)