We’ve spent a great deal of energy and money over the past few years trying to reduce our over-all carbon footprint. Much of this has come in the form of thoughtful planning and design, environmentally conscious purchases and energy saving design features from SIPs walls to in floor radiant heat. After just over a year of living in our new “green friendly” home we have some hard data to determine how we’ve been doing.
When our initial Home Energy Audit was completed in February of 2008 it was estimated that we would spend an average of $120 a month on our electric, heating and cooling needs based on the makeup of our homes. The actual results from one year of use showed that we were above this estimated mark, and spent on average $180 a month. Our natural Gas consumption was really good (right around the estimated amount) even with the slightly elevated costs of fuel this winter. Much of this could be attributed to the passive solar design of our house, and our active role as home owners to make sure our shades were open and closed at the appropriate times so that we could harness this free energy source. On several sunny (but very cold days) last winter when the temp was around -12º our home stayed a toasty 72º without the furnace running during the daylight hours. Although, our natural gas consumption was within the estimated range or electric was not.
Having had our solar audit done just this past fall we knew that our home electricity consumption was high. Some of this was as a result of phantom loads from appliances, several work computers being used regularly during the day and of course some careless personal habits, like leaving lights on in rooms that weren’t being used or not unplugging unused electronics. What is most disturbing about the number being high for our electric is that we’ve done a lot of simple things like replacing most of our lights with florescent bulbs to mitigate some of this consumption. Yet we were still on average using more energy than I think a household of 4 should be. Since our fall solar audit we have seen a reduction in some energy use by introducing power strips in certain areas to help stop unwanted energy consumption from phantom appliances, as well as the introduction of some new dimming florescent light bulbs into areas where they previously weren’t available. But the truth is we still could be doing a lot better. The biggest thing that needs to change for this to happen is to improve our energy use habits by being more aware of our consumption practices. So how can we do this? I know there have been many times where I have walked up stairs after dinner, only to find that the boys had left every light, tv radio and computer on. Then this weekend while watching a show called Wa$ted on Planet Green I learned of a great way to monitor your homes energy use at all times, with a product called the Cent-0-meter. I wasn’t able to find much on this specific product but I found another similar product called the PowerCost Monitor ™ which basically does the same thing. For around $120 to $150 you can get a single device which tells you at all times what your home is using for energy and what it’s costing. This small investment seems well worth it, if it can help keep me aware of unwanted waste and improve our families energy habits.
The PowerCost Monitor and Cent-a-Meter (shown above) offer a wireless up to the minute tracking of your homes energy usage.
Although our electricity consumption was a bit high there was one area where I felt we did outstanding in my opinion—water consumption. According to various studies the average consumption of water per person in the U.S. is 30,000-40,000 gallons and for a family of four, like us, between 120,000 to 160,000 gallons a year. With that said, as a family last year we used almost exactly 60,000 gallons of water. Although, still not a number to scoff at by any means, it is significant. Considering that this usage included the watering of a newly laid sod lawn and plants this summer, which marked our highest period of consumption in mid-summer.
So why were we able to keep this so low? On top of the dual-flush TOTO toilets and low flow faucets, we selected to help us reduce our water consumption, we also were very mindful of our usage. We used rain capture barrels in various locations around the house and then used that water for plants. Our sump pump which is very active all year around was used as a watering aid for our lawn throughout the summer and we practiced good water management, by limiting the length of our showers and turning the faucets off when brushing our teeth or other simple daily activities.
I think doing an audit of your family’s energy and consumption practices is really enlightening. For me it was a reminder that all the green products, good planning and intentions are only maximized when you take the time to practice responsible behavior. My hope/plan is that by next year we are able to reduce both our consumption of electricity and and water significantly. By doing so we’ll not only lighten our impact on the environment but reduce the cost on our wallet.