Competitive Conservation
Wednesday, September 21st, 2011Anyone who knows anything about me knows that I am a classic “Type-A” personality: focused on being productive, ambitious, and competitive. Having children has mellowed me a bit, however, if there is a contest I absolutely want to win it. So you can imagine my dismay when our utility company recently began sending out “Home Energy Reports” tracking our energy usage against those of our neighbors and our household ranked a dismal #78 out of 100 neighboring homes (with #1 using the least electricity).
We have all the typical electric conveniences of a modern American home: electric lighting (nearly all with CFL bulbs), a dishwasher (energy star), a refrigerator (energy star) ,three window air conditioners (all energy star), a TV, and a computer, but we have one thing most households around here don’t have – an electric hot water heater. When we moved in we actually had a hookup for an electric stove as well; which we promptly changed to gas.
Electric appliances are almost unheard of in older homes in Southern California and I wonder why our 1939 house was originally built with them – perhaps the builder of our home was swayed by all the pro-electric propaganda following the opening of the Hoover dam in 1936. (As an aside, our house had no clothes dryer; electric or gas when we moved in. Mildred, the 94 year old, original owner that we purchased the house from had simply used a clothesline to dry her clothes all those years. Shortly after buying the house we took down the rusting old clothesline
and put in plumbing and venting for a gas dryer. Ironically, two years ago as part of our efforts to use less energy, I had Jeff install a new clothesline and I now try to use the power of the sun to dry our clothes as much as possible, rather than the fancy dryer.) We’ve known for awhile that the electric hot water heater was a huge energy hog – from casual conversations with our neighbors I knew that our electric bill was significantly higher than theirs and the water heater was really the only difference between their homes and ours. The water heater also had the old yellow and black “energy guide” sticker still affixed to it which proclaimed that it was an “energy saver” model that was estimated to use 4933 kW/yr (411 kW/month) when it was manufactured in 1994. Water heaters become less efficient over time with sediment build-up in the tank and it is entirely possible that our water heater was using double or more its original estimated energy perhaps 10,000 kWh per year! Primarily due to efficiency concerns, a couple of years ago we obtained price estimates for switching from the old electric hot water heater to a tankless gas heater. Our water heater is located in a half-bathroom off of the kitchen and the plumbers frowned and spoke of venting and moving the heater outside to accommodate a gas tankless model. In the end, the estimates came in at around $4000 and we gave up on idea of an efficient heater. Last year, however, I heard about a new hot water heater – the GE Geospring Hybrid Heat Pump. The Geospring uses at estimated 1856 KWh per year at a water temperature of 135 degrees (we set our heater at 120 degrees so we should see additional energy savings). Not knowing exactly how much energy our old water heater was consuming we estimated that the new hot water heater would pay for itself in no longer than three years and as little as one year. As a heat pump the water heater had the additional advantage of cooling the air – which would be quite welcome on the hot, west facing side of the house where the water heater sits. With that, we took the plunge and bought the water heater in December of last year in order to qualify for a 2010 energy tax credit of 30% of the purchase price. The water heater then proceeded to sit in our garage for the next nine and half months. It turns out that while the new heater claimed that it could simply be swapped in place of an existing hot water heater; installation in a 1939 house with an 17 year old hot water heater wasn’t so simple. After receiving multiple estimates for the installation ranging from $500 to $1100 Jeff spent an afternoon on youtube looking up water heater installs and perusing the aisles of Home Depot. With $100 of supplies, including a new propane torch* to sweat copper pipe together Jeff set out last week to replace the old heater with the new. And after 14 hours of hard labor including a foray under the house at midnight to run longer electrical lines Jeff picked up a set of new skills (anybody need a plumber?) and we had a beautiful, space-age, efficient hot water heater installed.
A week later the new hot water heater is working perfectly and I am finding that it has an additional, unexpected benefit of making me strive to be more conscious of my electric use in general. For so long, I had known that the old energy hogging water heater was far and away our largest source of electric usage and I slacked off on trying to be more efficient with other devices. I now find myself shutting off the air conditioners unless absolutely necessary, admonishing Thomas for standing in front of the open refrigerator, and shutting off lights like a religious calling. I don’t know if we’ll ever get to #1 on the home energy report (my neighbors house is vacant and she is #2) but I refuse to allow myself to wallow down at #78. And after painfully paying bi-monthly utility bills of $500 or more (that covers sewer, trash, water, and electricity for two months) for years I am actually excited to get my bill next month and see just how low we can go. I also just realized that I have blogged about my excitement for a new appliance – I fear this officially makes me a lame grown-up.
*Bonus: I can use the torch for creme brulee! Seriously, this is what my pastry instructor uses to brulee desserts. Awesome.