No one ever bloody reads these documents further than the title, do they?
from page 4, the section entitled What These Findings do not Mean
Because I recognize the potential for controversy, let me be clear about what this paper does not say. Nothing in here should be taken as evidence that energy-efficient building codes are bad policies
The author isn't arguing the energy efficient buildings are bad, or don't work, he's arguing that states with such policies are overstating the energy actually saved. He acknolwedges that energy efficient buildings use less energy (duh), but he's saying that:
1) having an energy efficient house increases the propensity to use energy
2) Building codes are not adhered to in practice
It's worth noting that energy useage in homes has increased over time in much of the western world. Homes are made warmer in cold times and hotter in cold times than used to be the case. The author's study doesn't mention that as an effect.
Thank you. I was really wondering if anyone had read the article.
Homes built recently are not using 80 percent less electricity than homes built before the California standards were first enacted in 1978; they are using more.
Well duh.
They also seem to be comparing 1978 construction to today's. So many factor would play into this including site placement, technology and current maintenance.
There are a lot of problems with the paper, but I would say that it is because there are too many variables involved. I give it a B+.
And a side note for those who don't know: most building codes are written by industry (aka free enterprise) and adopt by government.
You are correct. I was on the National Electrical Code committee. The NEC is the electrical code used in the vast majority the country. New York, LA and Chicago have their own codes because their codes predate the national. The national owes a lot to these city codes though, because they were written before the national code.
Anyone who wants to modify, add to or to remove a part of the code can submit a proposal to the code committee. The NEC is re-issued every three years with the changes that are accepted.
There is a subcommittee for every section of the code. The proposals for changes are sent to appropriate subcommittee,
The subcommittees are made up from all of the interested parties, contractors, engineers, equipment manufacturers, the IBEW (the electrical craft union), owners, code enforcement, etc. In my experience including a term as a subcommittee chairman it is hard to get this diverse group of interests to agree on any change. Usually an especially major change had to be considered for at least one cycle, three years, before it was approved.
The electrical code is written under the National Fire Protection Association and is the default electrical code for the country. Any local government can write local exceptions to the NEC but they have write them specifically as exceptions to the national code. That is they must say that in addition to the NEC requirements of section X,XX we require additionally Z.
The reason for the code is personnel safety and fire prevention. It is a minimum requirement and we always recommended that specifying engineers quote the appropriate IEEE recommended practices for the type of construction they were working on for a more complete installation. The NEC cable sizing for example would result in a safe installation but the recommended practice is to oversize a frequently fully loaded cable to conserve energy. A NEC sized cable might run at a 130° C, safe but a large waste of electrical energy.