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code compliance

Oct 31
Love52

Residential Efficiency, Operations, and Maintenance

By Energy Rant No Comments
Last week, I received an email from the American Council for an Energy-Efficient Economy with the headline, Housing, Energy, and Consumer Groups Applaud Senate Opposition to Raising Energy Prices for Americans. “In a bipartisan vote today, the U.S. Senate rejected an amendment to block a federal proposal that will lower household costs by ensuring more new homes are built to up-to-date energy codes.” In other words, the Senate supports a federal proposal to lower household energy costs. This additional quote hooked me, “Brand-new homes that waste energy saddle their residents with high bills for decades, so up-to-date codes are critical.”…
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Mar 28
Love0

Decoding Code Compliance, Part 2

By The Big Why of Evaluation No Comments
In Part 1, we covered what energy code programs do and different ways of measuring code compliance. In this part, we will examine the steps needed to estimate program savings. Code adoption and compliance change over time. To estimate savings, we must consider the counterfactual of what would have happened if the program did not exist. When would a code have been adopted and how would building practices have changed over time? These are not easy questions, but let’s dig in. If Only It Was So Easy Recently I was looking through the Rhode Island TRM and chuckled when I found this description…
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Mar 02
Love0

Decoding Code Compliance, Part 1

By The Big Why of Evaluation No Comments
Building energy codes programs are a very cost-effective opportunity for energy savings and many utilities consider these programs the next frontier of energy efficiency. The potential savings from adopting more efficient building energy codes can be significant, but only if compliance is high. But do you measure compliance and how can the same building be 0%, 50%, 67%, or 80% compliant at the same time? Let’s dig into energy codes, what energy codes programs do, and how to evaluate their impacts. What Are Energy Codes? Building energy codes are local laws that establish requirements to limit the energy use in buildings,…
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Feb 15
Love0

Specious Beliefs in Code Gods

By Energy Rant No Comments
I received a lot of feedback on last week’s Code Compliance Villains, which described blunders that occurred as part of my high-efficiency boiler installation. Such mistakes would likely erode 50% of the estimated savings claimed in a deemed savings document. Efficiency issues included: Improper outdoor temperature sensor location giving false inputs to the controls. High boiler water temperature setpoints resulting in lower operating efficiency. Heat exchanger piped in parallel, rather than counterflow, resulting in higher boiler water temperatures and less efficiency. The problem with efficient equipment and energy codes is that equipment is tested in the lab, and hands are…
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Apr 24
Love1

Is Energy Recovery Always Good? No.

By Energy Rant No Comments
Last week we introduced exergy and at least one application of it in a building. First, let me make something very clear, for the refrigeration cycle, if I’m cooling beer or freezing leftovers, the heat that is sucked out of those masses is rejected somewhere else. For refrigerators and freezers, it is rejected to the room in which they exist. For air conditioning, most commercial refrigeration, and all industrial refrigeration, it is rejected outside – unless, it is captured for useful heating. Commercial HVAC For commercial HVAC, if CONsultants don’t think holistically about the entire heating and cooling needs, and…
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Oct 31
Love0

Benchmarking Clowns

By Energy Rant One Comment
It’s Halloween. Hundreds of thousands of people have to figure out a different costume because a clown plague has infected the country. While I don’t consume tabloid news, I did hear that in some cities, the clowns are getting beat up. I thought, now that isn’t a bad idea, but I wouldn’t advise that. When I was a kid, Halloween antics included dozens of mushy tomatoes and cucumbers left behind in the garden. These have the impact of water balloons, and they make a fine mess. For this post, I referenced my program booklet for ACEEE’s 2016 Summer Study on…
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Sep 27
Love0

Commercial Code Compliance and New Construction Program Failures

By Energy Rant 3 Comments
Earlier this year, the Energy Information Administration (EIA) released its Commercial Building Energy Consumption Survey of 2012. The prior release was 2003. The data do not paint a pretty picture for energy code effectiveness. Other data we are accumulating indicate new construction programs are failing to deliver. Regress At first glance, it seems substantial progress may have been made between 2003 and 2012. The first chart is from the EIA website. As EIA states, “the only statistically significant changes since 2003 are for office buildings, education buildings, and commercial buildings overall.” That is weak, especially considering that the data cover all…
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Jun 01
Love0

Condensing Boilers – Test for Show, Ship for Dough

By Energy Efficiency, Energy Rant 4 Comments
Everyone has probably heard at least one hundred or maybe a thousand light bulb jokes – the ones that disparage a class, gender, group, country, state, generation, etc.  The point is to make fun of the group in question because changing a light bulb is so simple, but it takes several doofuses in the disparaged group to do it.  Unfortunately, changing a light bulb is about the only energy retrofit measure that doesn’t get screwed up, usually.  Is this all we are capable of? In the past couple years, I have posted at least four Rants on energy code non-compliance:…
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Apr 06
Love0

HVAC’s Cure for Cancer

By Energy Efficiency, Energy Rant 2 Comments
In January, I wrote about code compliance and that while energy codes keep ratcheting down energy intensity in theory, reality is misery.  That post was a thinly veiled advertisement for my AESP National Conference session in the Lion’s Lair, and that presentation can be seen here.  My Lion’s Lair proposal was a thinly veiled pitch to fix what would be the equivalent of curing cancer for commercial HVAC systems. The cancer is the widely used variable, air volume system.  Another boondoggled application of one such system triggered this post.  The boondoggle was part of an evaluation we are doing on…
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Jan 19
Love0

Energy Code Compliance; Any Relation to Performance?

By Energy Efficiency, Energy Rant 4 Comments
Last week, I received a late Christmas package in the form of an opportunity to throw a pitch for code compliance that would actually move the needle.  This will be at the AESP National Conference in Orlando.  I owe a substantial thank you to ACEEE for choosing papers at last year’s Summer Study for Buildings and this recently published research report, Energy Codes for Ultra-Low-Energy Buildings: A Critical Pathway to Zero Net Energy Buildings. I discussed the Summer Study papers in a post back in August.  There were seven(!) papers presented on the subject of code compliance.  The lack of…
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