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Old 11-11-2013, 11:34 AM   #16
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I have no idea at all how much it costs to run a pizza oven, but I would imagine that once it's hot it doesn't take a lot to keep it that way.

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Old 01-13-2015, 11:34 AM   #17
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The other day while the furnace was running I was thinking the same thing about how much its costing me in gas usage. Funny that its all worked out here.
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Old 01-13-2015, 08:43 PM   #18
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In a dual fuel application it's common practice to determine cost per BTU delivered at various temperatures and switch to gas at the economic balance point -> when both cost the same per BTU.

A lot of the time,
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Old 01-13-2015, 08:58 PM   #19
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A lot of the time, the heatpump looses ground before the economic balance point - you switch over at whichever balance point comes first.
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Old 01-13-2015, 10:21 PM   #20
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Quote:
Originally Posted by mikevegas View Post
I am trying to figure out how much my per day charge is for natural gas?

I use @ 940 cubic feet of gas p/day in a small restaurant. I get charged .55 p/ therm. How do I calculate this?

My restaurant opened early in the year and my meter is reading 2921 X100. What do i owe on this with my price p/ therm being .55 cents?

So NERVOUS about my bill......................

ANYBODY PLEASE?!?!
its been awhile....but if memory serves me..1,000 btus =1 cubic foot...100,000 btus= 1-therm.you have 940 cubic feet x 1000=940,000 cubic feet divided 100,000=94 therms x.55 =51.70 per day...
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Old 01-13-2015, 10:33 PM   #21
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ok so its an old post ...big deal maybe he will come back and tell us if we were right... i bored
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Old 01-14-2015, 05:51 AM   #22
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Quote:
Originally Posted by ben's plumbing View Post
its been awhile....but if memory serves me..1,000 btus =1 cubic foot...100,000 btus= 1-therm.you have 940 cubic feet x 1000=940,000 cubic feet divided 100,000=94 therms x.55 =51.70 per day...
You reversed the math.

He used 940 CF. At 1,000 BTUs per CF, it takes 100 CF to make a therm. You divide 940 by 100. He used 9.4 therms. 9.4 times .55 equals $5.17
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Old 01-14-2015, 07:40 AM   #23
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Quote:
Originally Posted by beenthere View Post
You reversed the math.

He used 940 CF. At 1,000 BTUs per CF, it takes 100 CF to make a therm. You divide 940 by 100. He used 9.4 therms. 9.4 times .55 equals $5.17
hey bt ..Iam almost sure 1- therm = 100,000 btu yes no maybe its me but that would seem quite cheap... would you not take 940x 1000=940,000 divided by 100=94 therms x.55 =51.70

Last edited by ben's plumbing; 01-14-2015 at 08:10 AM.
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Old 01-14-2015, 12:55 PM   #24
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Heres what we know:

1. He uses 940 ft3 per day
2. There are 1,025 BTU per 1 ft3 of gas
3. 1 Therm is 100,000 BTU
4. His cost is $.55 per Therm

Setting this up and cancelling out units see below:
Attached Thumbnails
Natural Gas Cost For Furnace 1 Hour Run Time-new-bitmap-image.jpg  
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Old 01-14-2015, 01:04 PM   #25
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Quote:
Originally Posted by ben's plumbing View Post
hey bt ..Iam almost sure 1- therm = 100,000 btu yes no maybe its me but that would seem quite cheap... would you not take 940x 1000=940,000 divided by 100=94 therms x.55 =51.70

You went wrong by dividing by the 940,000 by 100. You have to divide the 940,000 by 100,000 since 1 Therm is equal to 100,000 BTU
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Old 01-14-2015, 03:13 PM   #26
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thanks guys /

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