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Do they need an HVAC tech or a pool boy?


Jim Katen
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Check out the hydronic heating system I saw today.

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- Jim in Oregon

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here my rates are 13.8 cents a KWH 13.8X24,000= $3.32 per hour of operation. With fuel oil @ $3.00 + per gallon it's not as terrible as it seems at first glance.

24,000 divided by .3=roughly 80,000 btu's X.95 (average efficiency) 76,000 btu's per hour

115,000 btu's per gallon of fuel oil X.80 (average efficiency)= 92.000 btu's per gallon

so: 8.77 gallons of fuel oil per million btu's divided by .8 =10.97 gallons per million btu's of usable heat

and: 300kwh of electricity per million btu's divided by .95 = 316 kwh per million btu's of usable heat

10.97 x $3.00 a gallon = $32.91 per million btu's

316 x 13.8 cents per kwh = 43.61 per million btu's

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Originally posted by Chad Fabry

here my rates are 13.8 cents a KWH 13.8X24,000= $3.32 per hour of operation. With fuel oil @ $3.00 + per gallon it's not as terrible as it seems at first glance.

24,000 divided by .3=roughly 80,000 btu's X.95 (average efficiency) 76,000 btu's per hour

115,000 btu's per gallon of fuel oil X.80 (average efficiency)= 92.000 btu's per gallon

so: 8.77 gallons of fuel oil per million btu's divided by .8 =10.97 gallons per million btu's of usable heat

and: 300kwh of electricity per million btu's divided by .95 = 316 kwh per million btu's of usable heat

10.97 x $3.00 a gallon = $32.91 per million btu's

316 x 13.8 cents per kwh = 43.61 per million btu's

In McMinnville, electricity is about 4 cents per kwh. Can you re-do your calculations to reflect that?

- Jim Katen, Oregon

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Assuming Chad's numbers are correct for Mbtu/hr:

The cheapest oil in McMinnville right now is biodiesel at $2.92 per gallon.

Electricity, thanks to the local steel mill, holds steady at about $.04 per kwh so . . .

Oil: 10.97 x 2.92 = $32.03 per mbtu

Electricity: 316 x .04 = $12.64 per mbtu

And now I know why folks in McMinnville like heat pumps so much.

- Jim Katen, Oregon

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