Don’t forget to turn off the lights next time you leave a room. You’ll make an 83-year-old physicist, with a passion for saving kilowatts, very happy

Do you know what the biggest energy drain is on your house? Well, if you don’t have a hot tub, it’s heating and cooling your house. My head is swimming with energy efficiency facts after producing this week’s QUEST radio piece on efficiency guru Art Rosenfeld. Rosenfeld is retiring, stepping down after two terms on the California Energy Commission. The guy has spent the past thirty five years fighting for us, California’s energy consumers. While electricity consumption has risen, sharply, in the rest of the country, California’s electricity use, per capita, has remained nearly flat since the early 1970’s. It is not that we are any less addicted to our flat screen TVs and personal computers, it’s that the state, thanks in large part to Rosenfeld’s dogged persistence, has put in place some of the strictest energy standards in the world. His passion for saving killowatts has saved billions on utility bills and improved air quality.

As it goes with people who are driven by a cause, the 83-year-old physicist is not really retiring. Rosenfeld will be returning to Lawrence Berkeley National Labs a few days a week to continue his research on low reflective white roof tops. His work has shown white roofs can cut electricity use by 15-percent by reducing the need for air conditioning and they combat climate change at the same time. White roofs are now mandatory on commercial buildings in California, thanks, in part, to Rosenfeld. Check out our radio story on cool roofs.

And by the way, don’t forget to turn off the lights next time you leave a room. You’ll make an 83-year-old physicist, with a passion for saving kilowatts, very happy.

Listen to The Godfather of Green radio report online.

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get tac redits and rebates for doing the right thing? What could be better? Image source: Mark_W

Top Five Federal Tax Credits (for improvements made from January 1, 2009 through December 31^st, 2010)

1.      Adding qualifying insulation to an existing home-30% of cost, up to $1,500 for all upgrades other than renewable energy systems.

2.      Energy Star-qualified metal roofs or asphalt roof replacements-30% of cost, up to $1,500 for all upgrades other than renewable energy systems.

3.      Efficient gas, oil, propane, and electric heat pump water heater replacements-30% of cost, up to $1,500 for all upgrades other than renewable energy systems.

4.      Solar water heating systems in new or existing homes-30% of cost.

5.      Photovoltaic (PV) systems in new and existing homes-30% of cost.

The feds are also giving money to the states for appliance rebates and is offering tax credits for certain window and door upgrades for new and existing homes, small wind energy systems, biomass stoves, geothermal heat pumps, fuel cells, efficient cars, and other equipment. For more detailed information about the federal tax credits, go to the California Building Performance Contactors Association.

*Top Five State Rebates (not time limited but rebates usually last until the money for rebates in each category runs out)

1. Adding qualifying insulation to an existing home-PG&E offers $0.15 per square foot in rebates.

2. Qualifying "Cool Roofs" replacement roofs-PG&E offers $0.10 or $0.20 per square foot depending on roof type.

3. Efficient gas and electric storage water heater replacements: PG&E offers $30 rebates.

4. Energy- and water-efficient clothes washers-PG&E offers $35 or $75 rebates depending on efficiency level and East Bay Municipal Utility District offers $125 rebates.

5. Irrigation systems and high-efficiency toilets-East Bay Municipal Utility District offers up to $1,000 rebate for qualifying water saving irrigation hardware and landscape material costs; up to $500 for WaterSmart replacement irrigation timers; and up to $150 for high-efficiency toilets (HET).

*This only lists rebates offered through PG&E and the East Bay Municipal Utility District, since these are the utilities that I know best. But most utilities offer similar rebates. For more detailed information about these and other California rebates for efficiency upgrades and water and energy efficient appliances, see Flex Your Power.

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Before You Invest in Photovoltaics, make sure your house isn't haunted by phantom loads.

When writing about energy efficiency in California, I know that emphasizing heating systems doesn’t carry much punch. I might as well try to get Californians interested in who makes the best deep- dish pizza. (That’s Chicago, of course. Zachary’s isn’t bad though.) Cooling systems are accounting for more and more of a share of residential energy use as we continue to build out from the cities near the Bay in hot dry climates. But overall, when it comes to climate, the inside and the outside of Bay Area homes are pretty much the same for most of the year. But let’s not get soft on energy efficiency! There are other energy users in California homes that threaten to lift us in the future to the level of, say, what a Wisconsin home uses in the winter today.

Miscellaneous electric loads are electric loads other than heating and cooling, water heating, refrigerators, and lighting, and include consumer electronics, outdoor lights, and portable inside lighting fixtures. The U.S. Department of Energy’s Energy Information Agency estimates that these “other” electric loads, along with televisions and office equipment, made up close to 30% of U.S. residential electricity consumption in 2006; this will rise to about 35% by 2020. Part of the reason for the growth in energy use of these devices as a percentage of total home energy use is that homes are heating and cooling more efficiently, with better HVAC equipment, tighter building envelopes, and more insulation.

Rich Brown and Greg Homan of Lawrence Berkeley National Laboratory, measured electricity use in 13 new California homes in 2007 and came up with some interesting results. They metered plug-in devices in standby, off, or low-power mode. Since the homes were not yet occupied, they estimated the annual energy use by using typical use patterns and the energy use of the plug-in devices in active mode, or “on,” measured in other studies. Some of the homes were model homes and packed with appliances and electronics like TVs, and others had only the plug-in devices installed by the builders. Builder installed devices include things like garage door openers, structured wiring, and gas fireplaces. The homes were in four different subdivisions and span the range of typical new construction to super efficient homes with PhotoVoltaic (PV) systems installed.

The builder-installed devices use on average 800 kilowatt-hours (kWh) of electricity per year, or about $80 worth with electricity at a low $0.10 per kWh. That does not include lighting energy. That’s interesting. About half of the energy used by the builder-installed devices is used by devices that are supposed to be turned off, or are in standby mode! That’s very interesting. This is like having a 50-Watt light bulb on 24 hours a day, 365 days a year, lighting nothing.

One of the model homes, the biggest energy user of the 13, used close to 2,500 kWh per year ($250) for two large televisions, a structured wiring panel that uses 20 Watts continuously to power three security cameras and an Internet router, smoke alarms, garage door openers, a washer/dryer, a very big refrigerator, and a few more devices. Add in lighting and that house is a major energy hog, even with super efficient heating and cooling systems and PV panels on the roof.

So what to do? Don’t even think of getting that PV system until you spend some time reducing your electricity load. The PV system you need to meet that load then won’t be so expensive. When it’s time to buy a new appliance, always look for the Energy Star label. Energy Star appliances use about 20% less energy than typical new appliances. Anything that uses a remote control, such as televisions and set-top boxes, or that displays the time of day all day, such as some stoves and microwave ovens, uses energy when officially off. Look for electronic devices that are really off when they say off, or that use 2 Watts or less in standby mode. For your other sleep slurping electronics, plug them into a power strip, and turn the power strip off when you aren’t using the devices. Then look into that sexy new PV system for your roof. More on that in my next blog.

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Watts in your kitchen?

The U.S. Department of Energy (DOE), which develops product testing for the Energy Star program, recently reached an agreement with LG, one of the world's largest manufacturer's of appliances and consumer electronics, over some LG refrigerators that failed to live up to the Energy Star label.

DOE allows manufacturers to test their own products. Some LG refrigerators were tested with their icemakers turned off and earned the Energy Star label, meaning that they are among the most energy efficient refrigerators on the market. But consumers don't generally turn their icemakers off. The LG refrigerators in question, with French doors and through-the-wall ice and water dispensers, can use up to twice as much energy than is reported on the refrigerator labels.

If you own one of the notorious refrigerators–go to the LG special web site to find out–then LG will send someone out to make some modifications, and hand you a check to cover all the hidden energy charges for the life of the refrigerator. Home Energy's Senior Executive Editor Alan Meier estimates that LG will be spending around $150 million on home visits and energy rebates.

Is LG the only manufacturer to circumvent performance standards? Probably not, so we are watching the news for more DOE settlements.

Do you know how to spot hidden energy guzzlers in your house? If you get your gas and/or electricity from PG&E, you can compare your home energy use over time and spot those peaks and valleys that indicate something is wrong, or something is right. If your electric bills shoot up soon after buying a new refrigerator, TV, or other appliance, and it isn't due to a change in the weather, you can easily spot the culprit.

If you have an online account, login, click on the "Billing" link, and then click on "Usage History". What's really cool, at least for energy geeks like me, is that you can pull up graphs showing two years of electricity use, gas use, and electricity and gas charges. And you can pull up a graph that superimposes your gas and electricity use with a graph of "heating degree-days" and "cooling degree-days". The degree-days give you a snapshot of the load on your heating and air conditioning systems–more on that later.

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Blower door equipment is used to measure a home's
air leaks. A blower door test is part of the evaluation for
determining a home's HERS Index.
Photo by: D&R International

Remember the day when most men knew the horsepower of their muscle cars? Now most of us are concerned about miles per gallon. But what can we use to bring prestige to our houses? It used to be that a large square footage gave us bragging rights. But if all goes according to the plan of the Residential Energy Services Network (RESNET), the talk around the water cooler will be "What's your house's HERS score?"

Home energy ratings have been around since 1981. The idea began in the mortgage industry to credit the energy efficiency of homes towards the home mortgage. An energy efficient home means that the homeowner is spending less each month on electricity and natural gas and therefore has more to spend on the mortgage. RESNET has been developing the Home Energy Rating System (HERS) since 1981. In the beginning, it was the higher the HERS score the better. But because of the more widespread introduction of renewable energy systems, such as photovoltaics (PV) and solar hot water systems, into homes, and the ability of many houses today to produce as much electricity and/or hot water as they need over the course of a year-these are called net zero-energy houses-a HERS Index of "0" is the goal. A HERS score of 85 means that a new home meets Energy Star standards. A HERS score of 150 means you're living with an Energy Hog. The typical existing home in the United States has a HERS Index of 130.

HERS raters look at a home's heating and cooling efficiency, insulation levels, appliance and lighting energy use, window efficiency, a home's solar orientation, and other factors that are tailored to the home's climate region, and use computer software to calculate a HERS index.

Some readers my be asking, "Why should I care?" You should care because the HERS score is becoming the standard du jour for homebuilders. If you want a bigger, energy efficiency mortgage, you'll need a HERS rater to measure the efficiency of the home you want to buy and to tell you what retrofits you need to do to qualify. If you are a builder and want to catch the "green wave" by earning an Energy Star rating for the new homes you are selling, you've got to get those homes rated by a certified HERS rater.

Many states have Energy Efficiency Portfolio Standards and Energy Efficiency Credit trading, and many more will in the future as we move towards national standards for meeting greenhouse gas emissions goals. The HERS Index is in place to serve the need for a third-party verifier of energy efficiency improvements.

Want energy efficiency tax credits for your new home? Better find a RESNET-certified rater. Moving to Canada? The Canadian RESNET, or CRESNET, is in the process of accepting the U.S. standards. I don't know the HERS Index of my home, but we did recently have some air sealing and insulation work done-but not quite to Energy Star standards. My guess is we'd score about 100. What's your HERS score?

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