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Passive House North West comes to Olympia

Cory — Sat, 19 Mar 2011 14:41:43 +0000

It was very exciting yesterday to attend the 2nd annual regional meeting of Passive House Northwest held at Evergreen State College. Last year at the 1st one, we had about eighty people attend. This year my guess would be well over three hundred. This didn’t surprise me because the movement is really picking up steam in the US. And why not, who doesn’t want to live in incredible comfort, have a home with minimal carbon foot print, as save a ton of money in the process. And because they are so energy efficient they only require about a quarter of the solar panels of a code built home, to supply all of you energy needs. Imagine never haveing to pay a power bill again.

The conference featured several talks on methodology, along with case studies of actual homes that have been built in the northwest. The speakers ranged from building scientist, builders and passive house consultants, to even the home owners of Passive House’s. The talks were very detailed, and incredibly informative. Also there where many vendors promoting the latest advances in things like windows, Heat Recovery Ventilators and air sealing tapes and fabrics. For me the most telling reason of why this is the right approach to home building was hearing the home owners, the folks who actually paid for and live in the homes, explaining how wonderful there new homes where.

I celebrated having attended the conference by meeting with my design team and the homeowners of what will become our first Passive House. We settled on a floor plan and will meet at the Patterson Lake site next week to review elevations and exactly how the home will sit on the sight. It very exciting and I will try to keep you updated as we move through the process.

Additional Tips While Choosing Windows

Cory — Mon, 01 Feb 2010 08:11:32 +0000

1. Shades, Awnings, Blinds, Curtains and even foliage around the windows can affect solar heat gain and can also be a cheap way to cool the house.
2. There are five parts of a window that affect its energy efficiency: Glazing technology; Frame; Operating Type i.e. how it opens and closes; Low-E coatings; Gas fills; Spacers. You need to check all these aspects of a window and ensure that they are the best suited for your climate.
3. Depending on the kind of problem you think you’re likely to have, focus on each of the six parts mentioned above. For instance:
a. If you live in predominantly warm and sunny climate, then you will need to focus on Glazing, Low-E coatings
b. If your weather is humid, then attention to spacers, frames and operating type will keep condensation and leakage problems in check
c. In cold climates, glazing, frame, spacers and gas fills need to be checked well before buying
4. Energy-efficient mortgages are a way of paying for energy efficient windows, which typically cost more than regular windows. This actually turns out to be quite cost effective, because the savings on energy and utility bills arising out of energy-efficient homes offsets the monthly mortgage payments. To get more details, visit the energy department in your state.
5. Important: Get your energy efficient windows installed by a professional. If not installed properly, they will be less efficient than even regular windows. . Make sure your installation expert has experience in installing windows and is familiar that particular manufacturer.

Windows and Natural lighting

Cory — Wed, 20 Jan 2010 08:09:34 +0000

It is very evident that the larger your window, the more natural light it will bring in. Depending on the positioning of your windows, and its visible transmittance (VT) value, your windows could provide you with enough natural light to greatly minimize if not eliminate electric lighting requirements during daytime.
VT values are generally given between 0-1. A rating of over 0.70 is the highest you can get with clear glass windows devoid of any coatings or tints. The more the number of panes, coatings and tints the lower the VT value.
A high Visible Transmittance has another advantage – it eliminates the cooling function which is usually required in a house that uses electric lighting. A high VT value is especially important when a home is built using passive house principles or design.
However, one thing to consider when it comes to VT, is that a window with a high VT value, will also admit that much more solar energy (heat) inside the room. Thus, a clear glass window with a VT of 0.8 will also have an SHGC of over 0.60 – something not at all desirable in a warm or sunny climate.
To get around this, one can use Low E coatings, which are invisible, and yet block heat gain considerably. These coatings also protect indoor furniture and upholstery from the damaging effects of UV rays. Another way is to have operable windows that you can open up to air the room out frequently. Needless to say, a good ventilation system is important when you have large windows and a sunny climate.
For windows that are low on SHGC and high on VT, look for a high Light-to-Solar gain ratio. This determines how much more light is let in without adding to the heat.

Windows and Heating

Cory — Sun, 17 Jan 2010 08:04:21 +0000

There are two ways that windows help in heating and cooling – by preventing heat loss from the room, and by taking in heat from the outside. The former is measured by a window’s U-Factor and the latter by SHGC. U-Factor measures how much heat is lost through the window. The actual math gets quite complicated – U-Factor tells you how much heat is lost in one hour for one square foot at a certain temperature. A low U-Factor value (usually of 0.35 or lesser) means less loss and thus better insulation. Conversely, some windows may even mention an R-value, which is a measure of insulation. A low U-value corresponds to a high R-value.
SHGC is a value between 0-1. The lower the value, the less the amount of heat a window admits. Depending on the climate and your heating/cooling requirements you will need to pick a window with the right combination of SHGC and U-value. In cold climates, you want a U-value lesser than 0.35 combined with a high SHGC of around 0.60 or higher. This will considerable reduce the load on your heating system. For warm climates, you want the opposite – a low SHGC of less than 0.40 with a high U-value.
Does this mean you will have to change windows to match the seasons? Not necessarily. A metallic oxide layer (called a low E coating) applied on the outside keep the heat out, lowering the SHGC and when applied on the inside decreases the U-value. Even tints work well, though they only reduce the SHGC value.
Does material matter? Very much so, windows made of wood are not very good on insulation, while vinyl and fibreglass frames have the lowest U-values. Metal should be your last option when looking for insulation.

It’s important that you install LED’s correctly

Cory — Wed, 02 Dec 2009 08:13:21 +0000

There’s quite a fraction of people reading this series on LED lighting who will nod their heads in disagreement. You’ve probably heard from your friend’s that they are very-expensive, very-chic, or that LED installations go bonkers after a few months. The problem is not with LED. LED is one of the best lighting options for residences, when used correctly. An inexperienced electrician and incorrect buying decisions can do a lot of harm to the lighting of the house, to you and your pocket. Here’s what to bear in mind:
1. Buy the right type of LED for your requirements. There are low wattage LEDs, which will work on 1mA (very little) of electricity and there are also new High-Power, high wattage LED which will work on more than 1A (100+ mA) and produce over 1000 lumens. The low wattage ones are used singularly to create different effects, usually for decorative purposes. The high wattage ones are used in place of a light bulb, or used in an array to provide enough light for an entire room.
2. Both types of LED lighting have different requirements. Low wattage LEDs burn out very quickly if not used with the right kind of voltage. They require much less than what is available by default in homes. High wattage ones, on the other hand can work with what we have in homes but need adequate heat sinks that will absorb the extra heat they will produce. If heat sinks are damaged, the lighting will burn out in seconds.
3. LEDs are quite affected by ambient room temperature. Installing them into walls which are not properly ventilated or in rooms that tend to get warm affects their life expectancy, causing them to fade out faster.

Green Tour Comes To Olympia

Cory — Fri, 27 Nov 2009 14:03:26 +0000

The Eco Builders Guild \ South Sound Chapter has announced it will host the South Sound Green Tour on April 17th and 18th, 2010
The theme of the event will be Innovation – Education – Inspiration

It will be a community event to celebrate green innovations through education in sustainable building and inspired living.
This year’s tour will showcase the greenest homes and buildings in our area that incorporate significant use of solar or other renewable energies, new and reclaimed materials, low energy consumption and water conservation technologies, and sustainable design techniques.
Educational sessions will be held at various locations and feature real life topics on how to build and live greener. See our website for more details – www.SouthSoundGreenTour.com ( The site should be up and running by January 1, 2010

South Sound Green Tour is looking for participants and sponsors. If you are interested in either contact me at info@laupenhomes.com. After January we you will be able to contact us directly at SouthSoundGreenTour.com

Is Passive House construction worth it?

Cory — Fri, 16 Oct 2009 08:22:10 +0000

Quite frankly, it is not to much effort. Building technology has developed to a great extent since the passivhaus standard came into existence, and it is quite a bit easier to build a passive house now than it was 10 years ago. Most of the building material that you require are easily available. Passive houses are as comfortable to live in as any other homes and in fact are healthier and safer because of the building design.

Passive houses are more expensive to build than conventional homes because of the materials required between five and ten percent depending on size. However, over the long run, they have proven to be much cheaper. When you look at how much a conventional home costs in terms of heating, cooling, ventilating, electricity, and air conditioning – a passive house turns out to be a cheaper bargain.

Passive homes are not that uncommon either. Although it is difficult to find a completely passive house in the US – they’re common in the UK and across Europe. Closer to home, we have green homes that make use of some of the principles of passivhaus and add their own two bits to create an energy efficient green home. In Washington DC, we have architect and green builder Travis Price’s four story green home, just about 10 minutes from the White House. His house was featured on the Discovery channel’s World’s Greenest Homes – which, by the way, is a great show to see how much and how easily people can build green homes for themselves.

Remodeling – Lighting & Electricity

Cory — Wed, 23 Sep 2009 12:42:57 +0000

When you approach an eco-friendly contractor to build you an eco-friendly home one of the things he Is going to suggest (and carry out too) is the switch to solar electricity. Depending on your requirement, resources and the location, there are quite a few options you have when it comes to using solar electricity: You could install solar panels to generate total or partial capacity or you could buy it directly from your provider.

Your contractor will suggest that installing solar panels will be the most effective way to turn your home green. A better contractor, however, will suggest ways to make the best of the ambient sunlight you have for lighting purposes, so that you’re now powering other electrical appliances with solar electricity, and not so much the lights. This can be done by the Passivhaus standard which will entail constructing the home in such a manner that most of your rooms are lit up with natural sunlight, while ensuring that it doesn’t heat up the house unnecessarily.

The other things you want to discuss are appliances that save electricity: EPA certified one, CFLs, and the latest – LED lamps. Also, it is very important to ensure that you and the contractor carry out an energy audit of your existing house first in order to compare the savings your new house will generate.

Buying, Installing and Maintaining a Solar Water Heater

Cory — Tue, 01 Sep 2009 08:01:47 +0000

Many of our customers want to shift to solar energy, but find the investment in a solar electric system too heavy. For such individuals, we often recommend going for solar water heaters to take care of the water heating requirements. This is relatively cheaper and easier to install, so you can save the environment and some cash too.

There is a basic difference between solar electric systems and a solar water heater. The former use the light energy of the sun and the latter, use heat energy. Thus, solar water heaters come sans the PV modules but with a solar collector which traps heat instead of light. There are 5 types of solar heaters available in the market:
1. Batch systems: For a 1-2 person household, low cost, temperate climate (not very cold winters), simple.
2. Thermosyphon systems: Passive solar system with no moving parts, suitable for temperate climate, less efficient and more expensive than active solar systems but very reliable, obtrusive in appearance. Fit for 3-4 person household.
3. Open-loop Direct Systems: Active solar system, the most simple of systems, heats domestic water directly in a storage tank, works well in temperate climates
4. Pressurized Glycol Systems: Closed loop system which heats up a non-freezing fluid and uses this fluid to heat up the water, suitable for regions with freezing temperatures,
5. Closed Loop Drainback system: Requires minimum maintenance, Works on similar principle as above, distilled water used as the heat transfer fluid.

Solar water heaters make a lot of financial sense and will drop your electricity bills or heating bills by almost 50%-80%. Add to this tax rebates and credits that you’re entitled to on purchase of a solar heater and the overall cost is reduced by a huge number.

Energy Efficiency – One Step at a Time with Solar Panels

Cory — Sat, 29 Aug 2009 08:01:26 +0000

Using solar energy in any form in your house contributes in many ways to preserving and bettering the environment, and also the quality of indoor air and the home itself. With the way the environment is going down and fossil fuel prices are going up, energy efficient homes are the only kind of homes that can sustain in the 21st century and beyond.
Therefore, be it solar water heaters, lamps or an entire solar electric system – solar energy is an important step and consideration in making your home energy efficient.

Often though, creating a completely energy efficient requires extensive remodeling, in order to take care of heating, cooling, lighting, plumbing, insulation, electrical appliances and other things. This may not be feasible for everyone, and sure enough, isn’t, for many of our customers. Therefore we generally suggest homeowners who want to shift to an energy efficient to start by just adding solar panels, and a simple solar electric system. This takes a lot of burden off the environment and also your own budget in a threefold manner:

1. You are no longer using electricity produced fossil fuels to power your home (which is not very energy efficient either)
2. Although your home is still inefficient when it comes to energy, at least you’re using clean, renewable and home-made energy to power it.
3. You’re taking some measures to introduce energy efficiency without burning a hole in your pocket.