I mentioned last January that we got stuck with a big ($500) utility bill that month. There was no question in my mind that our energy consumption was off the chain because of a record-breaking three-day cold snap. Now that I’ve got a year’s worth of utility bills, this is even more evident.
Here’s a handy chart from Entergy.
And here’s the detailed breakdown…
|Month||kWh Used||Days Billed||Avg. Daily Usage|
As one can see at a glance, we consumed about twice as much energy in January as we did in the month before or after.
I’m particularly happy to have this baseline data, because we are getting some insulation underneath our house Monday. As I mentioned in January, there was a study which looked at four different ways of insulating beneath raised homes right here at the Musician’s Village in New Orleans. After some nagging, I finally got Dr. Samuel V. Glass to send me a preview of the study, “Moisture Control in Insulated Raised Floors in Southern Louisiana.” Glass is a research scientist in the little-known field of “Building Moisture and Durability” at the U.S. Forest Products Laboratory in Madison, Wisconsin. The authors are presenting the research at a conference in December so it’s still not public, but you can view a news-style summary.
The main concern most people in these parts have about insulating underneath relates to moisture accumulation in the warm months. Moisture can lead to termites and mold and other bad things. From what I got out of the study, I think the number one thing that can minimize moisture problems is to just not set one’s thermostat too low in the summer.
Other than that, they seemed to find rigid foam boards and closed-cell spray foam to be the best. We are going with the latter from GreenBean. Closed-cell is purported to be the most expensive option, at least in terms of materials; it is costing us just over $2,000. I think I can also file for some sort of tax break before the end of the year.
So we’ll see what our energy consumption is like over the next year and compare. I’ll get back to you in November 2011.