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David Rabenau

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Credentials

David Rabenau is a Certified Missouri Home Energy Auditor

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Leadership in Energy and Environmental Design Accredited Professional (LEED® AP).
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BPI Certified Professional:
Building Analyst
Envelope

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Energy and Environmental Ratings Alliance
Certified HERS Rater

Archive for April, 2010

Common Misconceptions: Insulation Is All You Need

Tuesday, April 27th, 2010

Ask most homeowners whose utility bills are high what their homes need, and more likely than not they will reply “insulation”. One of the very first homes I audited was for a elementary school teacher who was a friend. She was going to buy more insulation for her home and thought she’d run the idea by me. I went over to her home and tested it with a blower door, and no amount of insulation was going to bring her utility bills down. It was one of the leakiest homes I’ve measured, still to this day. In other words, it had a lot of air moving through it. What most homeowners don’t realize is that insulation is only one side of the coin. Air sealing is the other. The two combined, an air seal and insulation, is what defines a good thermal barrier in the home, and yet most non-professionals only know about insulation.

A way to illustrate this might be the following example. Let’s say you want to go for a bicycle ride on a somewhat chilly day. Outside temperatures are in the upper 30’s F. If you put on your fleece jacket and hop on your bike, do you think you’re going to stay warm? Doubtful. Why? Because you know that cold air will sail right through that fleece rendering it next to worthless in keeping you warm. Put an outer windproof shell over that fleece and immediately you’ll notice a huge difference. In fact, it’s safe to say that you might quickly find yourself too warm. Not only is fleece (insulation) more or less worthless when air can circulate through it, by comparison it’s not even as important as the shell (the air barrier). If you’re riding that bicycle on a cold winter day and had to choose between a shell (air barrier) and a fleece jacket (insulation), which one would you choose?

Even still, in the building science classes that I teach for up-and-coming BPI home energy auditors, it takes awhile for this to sink in. Invariably when asked what can be done to an example home that is leaky, a couple of hands rise and blurt out “Add insulation”. This notion has been so ingrained in us by the pink, blue or beige insulation companies that it even takes some trained professionals awhile to get it. Oh, and that R-value printed on the insulation package? It was measured when the insulation was enclosed on all six sides in an airtight enclosure.

So the first common building science misconception is that insulation is all you need. While that may be true for a specific home here and there, it is most often incomplete. That insulation must be paired up and side-by-side with a good air barrier. Otherwise, that bike ride is going to be pretty darned cold.

A Tale of Two Cities: Utilities’ Energy Efficiency Programs

Wednesday, April 14th, 2010

Not sure why this is a conundrum for some utility companies and not for others. After all, in this case they are both regulated by the same state Public Services Commission. Yet one has had long-standing and vital energy efficiency programs. Kudo’s to the other side of the state!

Program Kansas City Power & Light
(Kansas City, MO)
Ameren UE
(St. Louis, MO)
ENERGY STAR New Homes Program Yes
$800 rebate
$750 for HERS rating
No
Home Performance with ENERGY STAR Program
(Existing Homes)
Yes
Up to $1,200 in bill credits for a HPwES improvement
No
Discounted CFLs Yes Yes
Solar Rebate Yes
$2 watt installed
? – state requirement, but not found on website?
Energy Efficiency HVAC or Heat Pump Yes
Cool Homes Program provides up to $850 rebate
No
Energy Efficient Appliance Rebates Yes
Free programmable thermostat ($300 value)
Yes
Dehumidifier, $25
Freezer, $50
Room A/C, $50

My Take on Local Market Conditions for Home Energy Auditors

Wednesday, April 7th, 2010

I get a lot of calls from people asking me about local market conditions for auditors and raters. Green employment is highly desired by many, of course – and even more so when people get laid off from work they didn’t enjoy doing in the first place. It gets them thinking. Some of the calls are from locals, but I get just as many calls nationally. Most of those are former St. Louisians planning on moving back home.

So, I thought I’d write a quick note about our local market conditions for anyone interested. Interested persons might first start, however, with my previous posts about business models, because market conditions have a lot do with whether or not you are going to be a “contractor” or a “consultant”.

Needless to say, these are merely my opinions. I could be right or wrong.

On a macro level, St. Louis has been hit hard by the “Great Recession” just like so many other places. Lay off announcements still appear in the St. Louis Post-Dispatch every week. So, in general, times are tough. There is always some new construction, but it is still greatly diminished. Like elsewhere, there are a lot of construction folk out of business. Thus, even if you are a rater, don’t count on much bread and butter there. There are some custom homes being built “green”, but from my point of view most of that effort is still supply driven, not demand driven. There is a lot of green marketing going on, with all the associated BS which that usually entails.

At that same high level, remember that the St. Louis metro area has some of the lowest utility rates in the nation. This, and the fact that our climate is actually relatively moderate, means that you won’t necessarily be able to rely much on “payback” as a sales tool. There are incentives at the Federal (tax credit) and State (rebates and a tax deduction) levels, and they certainly help; however, those incentives are usually a nice surprise for clients, not a motivator.

There is some auditing business for existing residential. Enough to make ends meet (for me, anyway), although I do know of a lot of auditors who are kept by their day job. They’re ready and waiting, but the business for most just isn’t there. If you’re going to be new in the market and have some savings to scrape by for a fair amount of time, you may do alright. I have always believed that there is always room in a market for really good people. I think that’s still true, even now. But only you can judge yourself in those terms.

What do you need to actually do business as an auditor? Missouri doesn’t license auditors, so have at it. (You may need to get a local business license, though.)

If you want to be on the Missouri Certified Energy Auditor list maintained by the Energy Center of Missouri’s Department of Natural Resources, you need two things: 1) Either be a certified HERS rater or a certified BPI Professional Building Analyst, and 2) insurance. Being on that list qualifies your customers for a Missouri Tax Deduction.

In the St. Louis metro area, if you want to be on the Home Performance with ENERGY STAR (HPwES) list, you need to be both a certified BPI Professional Building Analyst and a certified BPI Envelope Professional. The HPwES program is run by the EarthWays Center of the Missouri Botanical Garden for the Missouri Department of Natural Resources. In my humble opinion, the program is in some disarray. It doesn’t have much funding (it’s never had much funding for market development) and I don’t believe right now it’s running any training classes. Still, it’s a good group of people and worth making the connection. About one-sixth of my existing residential work comes from HPwES referrals off their website.

Having written all this, there are two items on the horizon that may make a huge difference. (Old-timers laugh because there has always seemed to be some great things “on the horizon”, but when oh when will they get here? In other words, in their minds, energy efficiency has more or less always been an industry poised to take off.)

First, there is PACE, or Property Assessed Clean Energy, working its way through the Missouri Legislature. This is a funding mechanism which should help immensely, in that money loaned to a home for energy efficiency or renewable energy improvements is paid off via a property assessment. This means that whoever owns the home at any given time (and who is reaping the operational benefits from energy efficiency or renewable energy) will be paying off the original loan. That’s huge. I, as an individual, will no longer be responsible for paying off the loan, the home will. I, for example, can move to another city with my job, etc. And because payback times are stretched out here in Missouri, that’s a big plus.

Also, the Home Star program making its way through Congress at the Federal level will also help, but mostly if you are a “contractor”, not a “consultant”. When that passes, you may see a lot of contractors move into the market, some of them big. If so, I expect all hell to break loose. $99 energy audits (apparently these are already occurring in S. California). “Little” local firms will be competing eventually with national firms, some of them with tremendous amounts of knowledge and experience in energy efficiency programs.

So there you have it. The market? Not great, not grim, and as always, forever hopeful.