Comments on: The 2015 Energy Code Will Have a HERS Rating Compliance Path

By: David Butler

David Butler — Mon, 14 Oct 2013 22:51:22 +0000

@Craig, perhaps you missed
@Craig, perhaps you missed the part about HERS being an OPTIONAL compliance path? Jeez.

By: Craig Davis

Craig Davis — Mon, 14 Oct 2013 22:05:03 +0000

Well, I figured it would
Well, I figured it would happen sooner than later. Another bunch trying to create an industry and jobs for themselves at the builders expense. Energy conservation is one the most important things in the building industry, but do we need a self imposed bunch of HERS Raters making a living off the builders ?? As a consumer and home buyer, I want the freedom of choice to upgrade and make energy choices on my own without placing it on a 30 year loan with interest. This sounds like a typical government program so they can make the money by controling our decisions.
I say, if HERS Raters are so in tuned with putting regulations on new homes, why don't they become a home builder so they can explain to first time buyers and low income buyers why they can't qualify for a new home due to the cost increases on new homes. What ever happened to freedom of choice ?? Oh yeh, the Government !!
That comment should bring out the HERS supporters.

By: Peter Brown

Peter Brown — Fri, 11 Oct 2013 18:55:29 +0000

Bob,

Bob,
The EPS you found is for existing homes, not new construction. Yes, it is produced by CakeSystems, although CakeSystems can be customized to produce a score card that is unique to a local market. If you’re a home performance contractor the cost is a wise investment, as CakeSystems is fast, easy and accurate. Plus, it increases the professional appearance of your company and produces meaningful homeowner reports that have been shown to increase conversion rates.

The EPS I was referring to is for new homes, and is only used in Oregon. Here’s what the scorecard looks like:http://energytrust.org/library/forms/ENH_TP_EPS_Certificate_sample.pdf 

The value is it’s an easy to understand energy rating and steers the consumer towards thinking about consumption. It’s produced using REM/Rate. In addition to providing the total annual energy consumption for the home as built, it also tells the consumer what the energy consumption would be if that house was built to code and what the energy consumption is of a similar sized existing Oregon home (using a blend of existing housing stock age and characteristics). This is useful information a consumer can understand and benefit from when buying a home.

Being a relative score, the HERS Index is almost impossible for a consumer to understand. I work with builders in Southwest Washington who use the HERS Index and can’t adequately explain what it means. I’ve eavesdropped in many model homes and never once have I heard a salesperson explain it well. That leads to a confused customer and a missed opportunity, both for the builder and our industry.

The comparison of how much more energy efficient a home is compared to the 2006 IECC is not something buyers can grasp. In seven short years will we still be comparing a home to the 2006 code? Imagine it’s 2020 and a salesperson who can explain the HERS Index tells a customer that this score tells you how much better your house was built compared to the 2006 IECC? That will sound dated and decidedly prejudicial. It’s like having a metric that compares the MPG of a car to a car built in 1970 and is an inherent problem anytime you date yourself.

By: Craig Senglin

Craig Senglin — Fri, 11 Oct 2013 09:49:59 +0000

Bob-

Bob-

I've looked at the EPS tool you mentioned (marketed by "Cake Systems"?). It looks like a great, & more accurate alternative to REM, but the steep monthly license + per use fee ensures it will never gain traction toward widespread acceptance, unfortunately.

By: Bob

Bob — Fri, 11 Oct 2013 05:34:33 +0000

What is a typical HERS index
What is a typical HERS index for a 1950's house that hasn't had any weatherization done? The older homes that have never had anything done since 1962 when grandma moved in are using 2x-3x the energy of a typical new home?

By: kim shanahan

kim shanahan — Fri, 11 Oct 2013 05:17:15 +0000

Allison, I think a lot more
Allison, I think a lot more states would have been inclined to adopt 2015, even over 2012 version, if the final numerical equivalencies had not been so drastically reduced in Atlantic City. CZ 5 went from 63 down to 55. BIG difference, as each lower index point becomes increasingly more expensive. Feels a little bait and switchy and not the numerical equivalency we supported. One wonders how an equivalency metric could have dropped 8 index points on the floor of the ICC final action hearings. Please investigate and help us understand how politicking can overcome what should be a consensus metric.

By: Bob

Bob — Fri, 11 Oct 2013 02:12:42 +0000

The problem with current
The problem with current "right sizing" codes is it's based on ManJ and whatever inputs the contractor wants to plug in. Basing it on sqft and climate zone gets rid of the ability for the contractor to add fudge factors when doing the calculations to get the result he wants.

Limiting by sqft/climate zone forces proper installation of the HVAC equipment and a reasonably tight building in order to avoid comfort complaints.

By: Allison Bailes

Allison Bailes — Fri, 11 Oct 2013 01:50:43 +0000

Bob: Right
Bob: Right-sizing is already in the code. It's a matter of enforcement.

Steven D.: I don't think that's what anyone wants of this.

David E.: I agree with David Butler that energy prices, especially transportation costs, would do that more effectively than codes or laws.

Craig S.: Yeah, one of my two big questions at the end of the article was about how many states will actually adopt this code.

David B.: Yep.

Peter B.: Thanks for bringing up the EPS again. I really do need to write an article about it. Regarding your suggestion that RESNET change the baseline energy code the HERS Index uses, I don't think there's any plan to do that, nor would it be a good idea. It doesn't matter how many states were ever on the 2004/06 IECC; it simply serves as our reference point. As you point out, if RESNET does change it, all previous Indices are no longer comparable.

Bob: You must be talking about this: An AC Sizing Benchmark for High-Performance Homes

By: Bob

Bob — Fri, 11 Oct 2013 01:25:38 +0000

Requiring a HERS test at the
Requiring a HERS test at the time of closing for a purchase or a refi just adds to the already out of control closing costs. Sorry, no deal. We have enough government interference/regulation in our lives already. HERS rating should be OPTIONAL selling feature, or at least limited to new construction.

IMHO it's much easier to simply limit the energy consumption/size of the HVAC system based on sqft and climate zone. Let the build decide if he wants to install higher AFUE/SEER equipment or make the house/ductwork tighter.

By: Peter Brown

Peter Brown — Fri, 11 Oct 2013 00:23:04 +0000

While the HERS Index (and the
While the HERS Index (and the work of RESNET) is a useful tool industry professionals it is not the ideal information to provide to consumers. A prospective buyer cannot use the HERS score the compare one home to another to evaluate energy efficiency. A 6,000 square foot home and a 1,600 sq ft home can both have the same HERS score. In Oregon we use an energy rating that is analogous to a vehicle MPG, miles per gallon. Called the Energy Performance Score (EPS), the score is simply the estimated MMBtu's/yr for heating, cooling, plug loads and appliances based on RESNET inspection protocols and modeling. An EPS of 54 means the asset (home) is designed to consume 54 MMBTu's/yr if occupied by a normal family size.

To move our market we need to do a better job of getting relevant, easy to understand information into the hands of consumers and other market actors. The EPS tells the consumer what the score would be if that home were built to the Oregon code in effect at the time. So that home with an EPS of 54 might have had an EPS of 85 if built to code, and both of these numbers, along with the estimated annual energy costs and salient technical energy specifications of the home, are displayed on the scorecard.

An important point here is the EPS baseline, or built to code score, is the code in effect in the state at that time. This is much more relevant than a code from many years ago that your state likely never adopted, or heavily amended. I work with builders every day, and not one of them can tell me what the insulation levels in the 2006 IECC were for their climate zone. Naturally, some states have more stringent energy codes. When I moved to Oregon in 2010 a code built home had a HERS score of about 85. Finally, when, or if, RESNET moves their baseline bar up to a more recent IECC code, all of those old HERS scores become meaningless. This is an inherent problem for relative scores. Because the Energy Performance Score remains constant it is a better tool for the marketplace, and therefore a better energy rating.