SanJoseGreenHome.com

QUESTION:

During my work with High Energy Homes, I’ve run into several homes with radiant floor heating. Most seem to use quite a bit of energy due to various factors from insufficient thermostat programming to poor insulation. Does anyone know of a contractor who can do an audit of this type of system?

ANSWER:

There are many companies that can do an audit, but none can actually make the radiant heat itself more efficient if it is the embedded concrete type. There, typically the pipes are closer to the ground than to the room – and contrary to common belief – heat does not rise. It follows the shortest route is.

One of the best things to do with these systems is insure the boiler is efficient, that the pipes are clean and not leaking. But the most productive change that I have found was getting a smarter thermostat. Basically it takes nearly 3 hours for the typical radiant heat system to actually warm the room after the thermostat says it is too cold. So a timed thermostat is essential.

It takes some experience figuring out how best to use these. You need to know the (more…)

However, without the proper knowledge, searching for a portable air conditioner can become an overwhelming experience. Between trying to figure out a plethora of acronyms like EER and BTU and wading through numbers all over the 1,000s, the confusion can multiply. But, with a basic foundation, a confusing and/or time consuming experience can quickly become a simple formula that leaves you lingering in the comfort and bliss of a perfectly cooled and de-humidified room.  And not only that, purchasing the right AC, the first time, will save you now and over the long run.

Basic AC Terms

“W”  – A “W” is a watt, which is the standard unit for measuring power.

“BTU” -  A BTU stands for British Thermal Unit and measures thermal heat energy. In terms of ACs, they will generally rank in the 1000s.

“EER” – EER stands for the Energy Efficiency Ratio of any given appliance and basically tell you exactly how much cooling your AC will be able to provide you based on the amount of electricity it’s using. The higher the EER rating, the less energy it consumes. As a basic rule, anything over 10 is deemed “good” in terms of energy efficiency.

You will often see “energy consumed” represented by a “W,” and EERs can also be listed as BTU/W.

This means if you (more…)

After World War II, houses and buildings were erected quickly and cheaply as a means to rebuild Germany. However, many people living and working in these houses and buildings soon became noticeably ill, with all signs pointing to the new buildings as the cause. It was this phenomenon that inspired the baubiologie movement in Germany, and has since been infused in other parts of the world as well. Below are the 25 principles of baubiologie.

1. Building site without natural and human-made disturbances
2. Residential homes away from sources of emissions and noise
3. Low-density housing with sufficient green space
4. Personalized, natural, human- and family-oriented housing and settlements
5. Building without causing social burdens
6. Natural and unadulterated building materials
7. Natural regulation of indoor air humidity through humidity-buffering materials
8. Low total moisture content of a new building that dries out quickly
9. Well-balanced ratio between thermal insulation and heat retention
10. Optimal air and surface temperatures
11. Good indoor air quality through natural ventilation
12. Heating system based on radiant heat
13. Natural conditions of light, lighting and color (more…)

Here is a great example how one can take an older home and make it more energy efficient with an element of smart design.  These home owners in San Jose could have built this sun room addition in an old fashion way but instead, they decided to incorporate a passive solar element that not only made their home more comfortable but also chipped off a few bucks off of their energy bills.  You will also learn a few more benefits of a cool roof and see a couple of them in action.

The technical info is fun and educational, however, your favorite part might just be the very end, where Sigmond shares a message with us all from his heart.  Enjoy.

If you have any questions for Sigmond feel free to leave a comment here or give him a call direct at 408-353-6727.

In a market where hardly anyone is building green in San Jose, this newly constructed house in Milpitas area stands as a monument of energy efficiency and inspiration.  

It is about 35% more energy efficient than a standard home and prides itself on green elements like engineered lumber, radiant barrier roof, solar water heater, energy star furnace, extra thick insulation, excellent indoor air quality and much more.  

Come with us on a video tour and discover for yourself what makes this property truly unique.

This beauty is a five year project by Green Earth Construction, a Milpitas based and family run company.  Sylvia Leung and her husband had a vision to go green 15 years ago and are finally able to marvel at the fruits of their labor.  In addition to what you’ve seen on the video, keep in mind that the home is wired for solar and if one decided to invest into solar panels, one’s utility bills for the most part of the year could be virtually zero.  Now that’s a good number, isn’t it? 

Building green normally commands higher costs so perhaps the most pleasant detail about this home is that when considering a dollar per square foot basis, the home is priced comparably to a 25 year old home.  If you like more details, you can find all the info under Featured Listings on http://GreenHomeParter.com.  Feel free to contact me directly with any questions. 

First off, a few burning questions… Have high upfront costs derailed your renewable energy or energy efficiency projects? Would receiving positive cash flow from day one make your clean energy project more attractive? Are you worried that it may be difficult to recoup your investment in clean energy if you sell your property?

To resolve these issues and accelerate the implementation of energy upgrades to commercial and residential property, cities and counties across the nation are offering PACE, a new financing model for clean energy projects.

To learn more about how PACE works and how it can benefit businesses and homeowners, I recently spoke with Dennis Tsu, who manages Business Development for Commercial PACE with Renewable Funding. Based in Oakland, Renewable Funding is the leader in the turnkey administration of PACE programs.

What is PACE?

William Dinkel: Could you please provide a brief summary of PACE programs for our readers?

Dennis Tsu: First off, PACE is an acronym for Property Assessed Clean Energy. The basic concept is to allow residential and commercial property owners to borrow money from their local governments to use for making energy efficiency or alternative energy improvements to their properties, and then to pay that money back through a (more…)

Many of us have had a relationship with the stock market of some sorts at one time or another.  Maybe you had more luck but when I bought into the hype in 2001 and lost a chunk in one week, my enthusiasm evaporated like the morning’s dew.  Then I came across a statement by Scott Case from EnergySavvy that read: “Home Energy Retrofits are 3.5X More Valuable Than Microsoft Stock: The 5-Year Payback on Home Energy Retrofit vs. Buying Microsoft Stock.”  Hmmm… given the previously disappointing outcome with the stock market, this sounded like an interesting proposition so I asked him to elaborate for us all here:

“To illustrate the impact of doing a home energy retrofit as an investment, here’s a simplified example. Let’s say 5 years ago, a homeowner in Philadelphia named Julie was deciding between buying $10,000 of Microsoft stock as an investment or spending that same amount of money on a home energy retrofit to reduce her utility bills. What would have been the better 5-year investment?

The Microsoft stock worth $10,000 in May 2005 would have turned into just over $12,100 five years later (a return of 21% over 5 years), including the increase in stock price and the dividends paid out over the course of the 5 years. But it turns out that (more…)

When many of us think of a solar home we normally envision a specially designed, carefully crafted construction .  Hardly ever we can think of a modest 1,200 square foot tract home in South San Jose as being a model for passive solar benefits that almost all of us can achieve.  This is exactly what Frank Schiavo did when he retrofitted his 1978 home to harvest our greatest energy source – the Sun. 

Frank was an extraordinary man.  He was an enthusiastic passive solar home consultant, environmental educator at San Jose State and an avid social change advocate.  One of his most fascinating qualities was that he produced no trash.  That’s right; he composted everything and never bought anything that he couldn’t recycle.  He even stopped paying garbage bills to the city which was a highly controversial and highly publicized move.  Gotta love this spirit of sustainability! 

Unfortunately Frank passed away very unexpectedly last January, just a week before we planned to meet, but he leaves his solar legacy behind for all of us to marvel at and learn from.  He really wanted to use his house as a way of teaching others about benefits of a green solar home “on a budget”. 

As a very tiny way of repaying his years of kindness to the community I would like to share with you some of the things that Frank was able to accomplish in his home (more…)

We all love a good myth. “Goldfish have a memory of only three seconds”, “Water drains backwards in the Southern Hemisphere due to the Earth’s rotation”, or maybe “A dog’s mouth is cleaner than a human’s”.  It’s all fun stuff until we actually spend cash on things that we thought will do us good but end up to be a complete waste of money.  This may come us no surprise but some very commonly believed energy upgrades seem to be just that – myths.

Rob Moddy is a fellow USGBC member who often whips out a masterful blog entry.  It’s just so hard not to share this one with you.  Here he highlights a talk given by building scientist Michael Blasnik at the Department of Energy’s National Weatherization Training Conference, particularly the problems with inaccurate computer models in determining weatherization strategies and effective home energy improvement measures. 

As originally posted on GreenBuildingAdvisor.com, this is a list of common strategies for home weatherization that don’t save much energy. If you don’t want to waste your time and money, these are the strategies to avoid or closely evaluate: (more…)

This is first net-zero carbon house in UK that reaches the highest level of sustainability. Dubbed the Lighthouse, the highly eco-friendly house was designed to “encourage a way of living that is inherently ‘light’ on the world’s resources whilst combining the practicalities of today’s average homeowner.

Almost all of us use the words green and sustainable interchangeably as if they have the same meaning.  But the more one delves deeper into the nuances, the more this funny little feeling starts creeping in that there seems to be some interesting differences there in these two noble concepts.  Why does it even matter?  Simply because by being able to separate the two we can make better decisions as consumers and become more mindful and equitable participants in our society.   

The product manufacturers, as well as building industry would certainly benefit by embracing “Sustainable” vs simply “Green” practices. Whereas green addresses mostly environmental elements, sustainable takes a more comprehensive view, including environmental, economic, social, and cultural elements. 

For example, a more sustainable and socially responsible approach to manufacturing would entail a fair and humane treatment of overseas workers, while the building community would certainly include a standard of quality well in excess of mere code compliance for “green” construction”. 

You see, building a house out of vastly renewable wood from a thousand miles away or engineered lumber, installing solar panels and solar water heater to satisfy the energy needs of the building would be enough to deem it “green”.  However, if the construction quality is poor and not much effort was invested into longevity of the structure (more…)