Some of you may have caught Art Woolf’s “solution” to the question of how we are to keep warm this winter – – electric storage heaters.
In his post on the “vermonttiger” blog reported in the Times-Argus he suggests that using off-peak electricity to heat your home is the way to go.
I know something about those critters and thought I’d discuss the pros and cons.
But first let’s start at the beginning – – there is smart energy and dumb energy. The dumbest is perhaps cord wood. It costs the least because its hard to handle and can’t do much but burn, somewhat inefficiently. Next in order of dumbest to smartest is wood chips, then wood pellets, then fossil fuels, then at the top of the heap, the smartest energy – – electricity.
That’s why around these parts, electricity has always been (except for short-lived price spikes) much more expensive than the other fuel choices.
Electric storage heaters, of the type that Art is talking about, store heat in ceramic bricks during the night time when electricity is cheapest and release the heat as needed. These heaters are expensive and very heavy. They include the necessary controls to allow them to heat in this fashion. There is nothing new about them. Many buildings put them in during the various other energy crises that we’ve had.
However, they are much despised little units and are typically removed when fuel prices stabilize. Why? Well there are a few problems with them. A primary one is that they absorb the heat during night-time and give it off 24/7. When heat isn’t needed during the day, they are still very hot and give off heat anyway (not as much as with the fan going, but overheating the space nonetheless).
And installing them isn’t cheap like Art suggests. First you need an adequate electrical entrance to the building. You need to remember that you need adequate capacity for two to three times what a electrically heated building would need because you can only accumulate the heat during the eight hour off peak period. This generally means upgrading the service entrance to the building as well as running wires to all the storage heaters.
Then there is the concern of what happens after a power outage at night. You won’t have any heat so you may then go and turn on the heaters during the daytime peak hours. If there was substantial use of storage heaters this would create new utility peaks and increase power rates.
And, of course, if oil continues its downward trend, the investment in the storage heaters would be wasted.
Personally, I think we should save the smart energy for smart purposes and burn the dumb renewables like cordwood, chips and pellets. Eventually the off-peak electricity will power a good number of automobiles.