FAIRBANKS — How abundant does it bulk to watch a TV show? To broil aliment in an electric oven? To allegation a laptop? To dry your clothes? Or, from an alike broader perspective, how does all of that add up to the acceptance allegation you see on your electric bill?
Determining how abundant it costs to accomplish a accustomed electrical apparatus requires a few abstracts credibility and some math. Here we go through the adding for an exoteric light, but you can consistently use an online calculator to save time or abstain the math. You can acquisition one on our website at www.cchrc.org/calculators.
Each electrical apparatus uses a altered bulk of electricity, from a coffee pot to a amplitude heater. For this article, we’ll attending at an alfresco brighten acclimated to ablaze the driveway in the winter. Let’s accept the ablaze is on a timer, and provides ablaze from 4-10 p.m. and 6-10 a.m. every day for a circadian absolute of 10 hours.
Next, acquisition the ability acclimated by the appliance. The ability is abstinent in watts or application (one kilowatt is according to 1,000 watts). Some accessories accommodate this advice on their case or in the apparatus chiral — attending for W or kW. In this example, the ball for the alfresco brighten uses 120 watts, or 0.12 kW.
Electricity is awash by GVEA in units of kilowatt-hours (kWh). The allegation depends both on how abundant ability an apparatus requires (kilowatts) and on how continued it is operated (hours). Electrical activity is affected by adding the ability by the breadth of time the apparatus is on.
Electrical cnergy = ability in kW x time in hours.
It’s important to use the actual units — application and hours — to bout the assemblage acclimated by GVEA (kWh). For instance, if your apparatus uses 50 watts, bisect by 1,000 to catechumen to application (0.05 kW). Or, if you accomplish an apparatus for 15 minutes, catechumen this to hours (0.25 hours).
The alfresco brighten uses 0.12 kW and is operated for 10 hours per day, so it uses 1.2 kWh of activity a day (0.12 kW x 10 hours), or 36 kWh per ages (1.2 kWh per day assorted by 30 days).
The aftermost footfall is to construe activity into dollars. To get the accepted bulk of electricity, analysis GVEA’s website for its rates: www.gvea.com/rates. For abatement 2014, the residential amount is about 21 cents for every 1 kWh.
Cost to run apparatus = activity in kWh x 21 cents.
The alfresco brighten appropriately costs $0.25 anniversary day to run, or $7.56 to accomplish anniversary month.
The “Ask a Builder” alternation is committed to answering some of the abounding questions Fairbanks association accept about building, activity and the abounding added genitalia of home life.
Ask a Builder accessories advance home acquaintance for the Cold Climate Housing Research Center (CCHRC). If you accept a question, acquaintance us at [email protected]hrc.org or 457-3454.
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