Friday, February 26, 2010

Your House: A Machine for Living

Since starting as an intern at 4CORE on January 4th I have been on a steep learning curve in the weatherization program. I have been exposed to a wide variety of tasks and gaining on the job training in a number of different aspects of the program. I am gradually finding my niche, and feeling like a member of the 4CORE team with something to contribute.

The part of the weatherization program that I find most fascinating are the investigations of client’s homes. Over the years I have owned several different houses, but I really didn’t understand how the different systems of a house, such as heating, hot water, insulation, the flow of air and moisture (to identify just a few) all interact to form one big system that affects your comfort, health, and energy use. The first thing 4CORE does when weatherizing a home is to investigate all the systems of the house, looking for ways to improve its efficiency. This investigation is called the ‘home energy audit’. If you think of your house as a machine for living and the different systems of the house as its parts, the energy audit is the diagnostic tool used to identify the inefficient and unsafe parts.

An example of an unhealthy condition that is caused by the interaction of the house systems is something called back-drafting. Back-drafting is when combustion exhaust is pulled back into the living area of the house instead of venting up the chimney, resulting in pollution of indoor air. There are many unhealthy gases in combustion exhaust but the gas we are most concerned with is carbon monoxide. Carbon monoxide or CO, is a colorless, odorless gas that can cause sickness or death.

When a furnace starts running, it takes the chimney five minutes or more to heat up enough to start a draft, and small amounts of combustion gas may enter the living space. This temporary back-drafting is called spillage. The type of back-drafting we are more concerned with is continuous, and can be caused by the interaction of other exhaust air systems in a house. In houses with a mechanical room that has the furnace and the water heater next to each other, the stronger combustion of the furnace can potentially pull exhaust fumes out of the water heater vent, creating unhealthy levels of CO.

Another situation is when several exhaust air appliances are operating at the same time and create enough air suction in the house to draw furnace exhaust into the living area. Let’s take a house where a fire place is burning, the hot water heater is operating, the gas clothes dryer is on, and the range exhaust fan is running. All these systems are sucking air out of the house and up the vents. In a case like that there is potential for back-drafting of the furnace combustion exhaust and CO accumulation. It is these types of “worst case scenarios” that energy auditors test for, and correct if necessary.

As a footnote, it is a good idea to install combination smoke and carbon monoxide alarms in bedrooms and hallways.

Learn more about how your house works and ways to make it more energy efficient: check out the book Cut Your Energy Bill Now (150 Smart Ways To Save You Money & Make Your Home More Comfortable & Green), by Bruce Harley, 2008.


About the Author:

Tom Zajicek is interning for 4CORE through the Rocky Mountain Senior Employment in Community Program. His interest in green building and energy efficiency lead him to choose 4CORE for an internship. He is presently getting training in weatherization, including energy audits and inspections. In addition he is working on client utility data, and developing a respiratory safety program.

Tom moved to Durango two years ago from Ithaca, New York. His varied previous experience includes home building, field biology, outdoor education, and industrial roped access inspection. When not working Tom is off to the mountains, canyons and deserts of the four corners area.

Monday, February 1, 2010

Colorado’s New Energy Economy

In November of 2007 Governor Bill Ritter announced Colorado’s first Climate Action Plan with the goal of establishing “clear strategies to reduce harmful greenhouse gas emissions,” for the purpose of ensuring Colorado's "energy, economic and environmental future," according to a Governors Energy Office GEO press release.

Following the Governor's action plan there have been significant advances toward a new energy economy for Colorado in addressing greenhouse gas emissions, both statewide and at the local level. In addition to advances in renewable energy technologies, energy efficiency through weatherization and certain insulation practices has helped to mitigate greenhouse gas emissions.

One way in which greenhouse gas emissions are being addressed locally is through the 2009 La Plata Climate Energy Action Plan (CEAP) in response to a US Mayor's Climate Protection Agreement. CEAP provides a tangible way in which concerned citizens can get involved in identifying ways "our community, individuals, governments, businesses, and other groups can reduce greenhouse gasses throughout La Plata County."4CORE is currently initiating the creation of a collaborative region-wide strategy to decrease emissions in for Archuleta, Dolores, Montezuma and San Juan Counties.

Currently, 4CORE works to decrease emissions in Southwest Colorado through the CEAP Process in La Plata County, by providing weatherization assistance to low-income households, and through providing information about energy efficiency. Other strategies include community education and outreach as a way to increase local participation, and an incentives and services strategy that reinvests funds into the community and offers individuals a rebate to facilitate effective and sufficient energy services.

To date 4CORE has issued 199 rebates to community members, totaling approximately $135,000.

These programs resulted in 2,730 Metric Tons of Greenhouse Gas Emissions prevented annually. To get a better idea of this quantity, it is equivalent to 125,391 mature trees consuming carbon dioxide each year, or taking 641 cars off the road for one year.

The GEO is a leader in promoting Colorado's New Energy Economy by pushing for the production and manufacturing of clean modern energy technologies. In addition, the GEO currently offers the Insulate Colorado Program for homeowners wishing to make energy efficiency improvements to their existing homes. The GEO partners with local Colorado organizations such as 4CORE to offer rebates directly to qualifying homeowners for the installation of insulation and air sealing measures through the Insulate Colorado program. For more information please visit the Partnership Opportunities Section for an application.

As a student of Environmental Studies interested in the preservation of natural resources, it is my hope that this push for a new energy economy in Colorado will eventually be translated into a shift from excess and shortages to a relationship of social restraint for the purpose of both ecological and economic sustainability and the overall health of people and the landscapes we live in.

Through my experience studying environmental policy and culture, although short, it is my opinion that the support and efforts made by local organizations are vital to the stability and effectiveness of programs and efforts like the Climate Action Plan and the Insulate Colorado Program.

Being apart of the 4CORE team is an exciting opportunity to experience this process first hand and witness change.


About the Author

D. Linnea Decker is interning for 4CORE through the Environmental Studies department at Fort Lewis College. Linnea is a Colorado native living in Montezuma County, and attends Fort Lewis College as a full-time student working on a Bachelor’s of Art degree in English/Writing and Environmental Studies/Policy and Culture. Her interests, not surprisingly, reside in spending as much time in the Colorado wilderness as possible snowshoeing, hiking, biking and writing about nature.