01-02-13, 05:44 PM | #1 |
Lex Parsimoniae
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Winter heating cost 2012/2013
Man has it been chilly lately!
Today's Extremes High Temperature 29.4°F 1:52pm Low Temperature 7.9°F 5:08am High Heat Index 29.4°F 1:52pm Peak Wind Gust 21.0 mph 12:21pm CLIMATE NORMALS FOR TODAY Normal High 36°F Normal Low 18°F Record High 59°F 1979 Record Low -15°F 1968 During the last 18 hours, we have burned almost 27 kWh. (abt $4.30) That's 1.5 kW continuously since midnight. The way the temperature is dropping, we might burn 38 to 40 kWh by midnight. And the forecast for tonight looks worse! They are predicting 2°F just before the sun comes up.. Woburn Hourly Weather - AccuWeather Forecast for MA 01801 I'm dusting off the space heaters and hoping we won't need to resort to oil.. It seems like it's going to be at, or under the Sanyos minimum effective operating range of about 8°F, between midnight tonight and 10AM Thursday. That's a long time to be running on space heaters!
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01-03-13, 11:03 AM | #2 |
Lex Parsimoniae
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Yep, it got chilly this morning!
Today's Extremes High Temperature 18.1°F 11:33am Low Temperature 1.7°F 7:28am High Heat Index 18.1°F 11:33am Peak Wind Gust 13.0 mph 12:38am CLIMATE NORMALS FOR TODAY Normal High 36°F Normal Low 17°F Record High 62°F 2000 Record Low -1°F 1968 I was awake, watching the temperature drop, and the TED display to see how much power the Sanyos would use at lower temps. Since midnight, we've burned 21.8 kWh. /12 hours=1.816 kWh each hour on ave. Meaning each unit was using 908 watts on ave. Amazingly, when it got down into the low single digits, the measured warm air output was still 80 to 100 deg F. The house stayed at 20C (68F) all night. TED says the Peak power used last night was 3.47 kW. (/2 = 1.735 KW each Sanyo) No back-up heat was needed..
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01-03-13, 11:12 AM | #3 |
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Are the Sanyos still more cost effective to run than the boiler despite their high energy usage on these cold days? Do you have a good way of compairing?
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01-03-13, 12:41 PM | #4 |
Lex Parsimoniae
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If you mean comparing to oil, that's not too hard.
Based on the last 10 days, the TED is projecting $139 (836 kWh) this cycle. That would be about $4.63 (~28 kWh) per day, if it stays petty cold. In Jan 2012, the Sanyos used 792 kWh (it was warmer) so TED's 836 kWh prediction might be pretty close. With the improvements we've made (attic insulation & den window films), I don't know how much oil would actually be used. IIRC we used to burn about 6 gallons on a cold day. If we burned 4 to 5 gallons a day during the coldest months, the cost would be around $16 to $20 a day. $480 to $600 a month maybe.?. That sounds like, what my some of my neighbors are paying for oil. Their information might not be too accurate, since the oil man comes around a lot more during the cold months. The main problem with using forced hotwater baseboards, they heat un-used rooms. With the Sanyos, we close the doors on those un-used rooms. That's one small bedroom and my computer/hobby room (during sleep hours). The Master bedroom door is also shut about 15 hours a day during the winter. After supper, we'll crack that door 6", and let in some warm air.. When I come to bed around midnight, I open it all the way.
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01-04-13, 09:14 AM | #5 |
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Ah, so it really is THAT big of a difference. Nice!
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