Ceiling Fans @ Hansen Wholesale
Ceiling Fans Experts Online Since 1994!
Free Shipping on Orders over $150
Call For Best Service - 1-800-201-1193
Products Navigation Menu Homepage Ceiling Fans Guaranteed Lowest Prices Residential Lighting Fixtures Fireplace gas Logs Firepalce Decor and Accessories. Screens, Doors, Tools etc. Firemagic Barbecues Green Products - ENERGY STAR Ceiling fans and Lighting
Hansen Wholesale on Facebook Hansen Wholesale on Twitter Now accepting PayPal
NEW Eco Fans!The Most Efficient Ceiling Fans
Tell us your Ceiling Fan ideas!
Bookmark this page!

How Much Does It Cost To Burn Gas Logs?
About Our Gas Log Fuel Consumption Calculator

January 11, 2010
By: Greg Tillotson
Gas Log Expert & Webmaster for Hansen Wholesale

We are constantly asked how much it will cost to burn a gas log, or how much gas a particular gas log will consume. In response to these questions, we have recently added the calculator you see below to the left hand navigation of all of our gas log search results pages as well as included the calculated usages and costs on each of our gas log product detail pages.

Calculate The Cost to Burn Any Gas Log...
Find out how much gas your gas logs will burn
and how much it will cost to run them per hour!

Enter the BTU rating of any gas log set...then click Calculate!

Gas Log BTU Rating: (Adjust fuel costs)
How Does this Gas Log Fuel Calculator work:

Basic Overview

The amount of gas (Natural or Propane) that a gas log will use is directly related to the BTU rating of the burner system you choose. The BTU rating is in fact the amount of gas that is burned by the gas log set, not the amount of heat that the gas logs generate...particularly when referring to vented gas logs since much of the heat goes up the flue. Ventless gas logs will pretty much produce the same amount of heat in BTUs as the amount of gas that is consumed because they are burned with the damper closed and 99.9% of the heat comes into your room.

However, most consumers do not know just how to translate BTUs into either the amount of fuel used, or the cost attributed to the BTUs, hence the reason we have published this page. In order to translate BTUs into something useful, you must first understand the terminology used by the company you buy your fuel from, whether it be natural gas or propane.

BTU: BTU stands for British Thermal Units, which is a standard measurement of the amount of energy contained in any fuel that is released per hour when it is burned. So a gas log set that has a 40000 BTU burner consumes 40000 BTUs of gas per hour.


Calculating the Cost to Burn Liquid Propane:

Liquid propane is normally sold either by the Pound or by the Gallon. So in order to make use of the BTU rating of a gas log to calculate the amount of propane gas it will consume and attribute a cost to that, we need to know how many BTUs there are in a pound or gallon of LP gas. Here is that information:

1 Pound of LP Gas = 22,000 BTUs
1 Gallon of LP Gas = 91,500 BTUs

Now that you have that information, you can easily calculate the amount of gas any gas log (or gas appliance for that matter) will consume. You simply divide the BTU rating of the burner by the BTUs for the unit of measure you want to check. Here is an example of performing the calculation for a 40,000 BTU gas log:

Pounds of LP Gas Used: 40,000 BTUs divided by 22,000 BTUs = 1.818 Pounds
Gallons of LP Gas Used: 40,000 BTUs divided by 91,500 BTUs = 0.442 Gallons

Calculating the Cost

If you know the cost per pound or gallon of your the LP gas that you purchase, simply multiply this by the calculated usage above. On our website, we actually perform these calculations for you on each one of our gas log product pages...but the calculation we perform is based on the National Average for the cost of Propane Gas, which in fact varies widely by region.

The National Average cost of LP Gas is $2.536 per gallon according to the EIA (U.S. Energy Information Administration) as of January 2010

Using this information, we are able to calculate the average cost in the USA to operate a 40,000 BTU gas log using this formula:

40,000 BTUs divided by 91,500 BTUs/gallon times $2.536/gallon = $1.11 per hour


Calculating the Cost to Burn Natural Gas

Natural Gas is normally sold to the residential consumer by the Therm (100,000 BTUs) or Ccf (100 cubic feet = 102,700 BTUs). So in order to make use of the BTU rating of a gas log to calculate the amount of Natural Gas it will consume and attribute a cost to that, we can use these numbers to do the math:

1 Therm of Natural Gas = 100,000 BTUs
1 Ccf of Natural Gas = 102,700 BTUs

Now that you have that information, you can take the BTU rating of a gas log and translate it into useable information by converting the BTUs into Therms or Ccf. To do this, you simply divide the BTU rating of the burner by the BTUs in a Therm or Ccf. Here is an example of performing the calculation for a 40,000 BTU gas log:

Therms of Natural Gas Used: 40,000 BTUs divided by 100,000 BTUs/Therm = 0.40 Therms
Ccf of Natural Gas Used: 40,000 BTUs divided by 102,700 BTUs = 0.389 Ccf

Calculating the Cost

You can find the cost of your natural gas in either Therms or Ccf by looking at your gas bill. If a different unit of measure is used, you will need to convert a little additional math in order to perform the conversion properly. However, according to the EIA, these 2 units of measure are the most commonly used for by gas companies when billing residential consumers. So, take the cost/Therm or Ccf and multiply by the Therms or Ccf used by the gas logs found from the previous calculation above.

On our website, we actually perform these calculations for you on each one of our gas log product pages based on the National Average for the cost of Natural Gas, which varies widely by region.

The National Average cost of Natural Gas is $1.368 per Therm according to the EIA (U.S. Energy Information Administration) for 2008. Based on this information, we are able to calculate the average cost in the USA to operate a 40,000 BTU gas log using this formula:

40,000 BTUs divided by 100,000 BTUs/Therm times $1.368/Therm = $0.55 per hour


Interesting side note: Based on the excersises performed above, we find that the National Average cost of Natural Gas is about half the cost of Propane. So if you have access to both fuels and are contemplating which to choose, then Natural Gas is likely your best choice.


Related Articles:
Have a Question About? Ask an Expert!

Talk To A Live Expert!
Call: 1-800-201-1193

or...Ask Your Questions Here!
(500 characters max)

*Name: 
*Email:  
Phone:  
Your information is kept private. Leave your phone# if you wish to speak directly to an expert (recommended)!

(We only respond to questions about brands that we sell)

Answers to Recent Gas Logs Questions Posted To This Page
  1. Question #9479 - Posted: 4/8/2014 1:36:59 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/vented/model.asp?StyleCode=RDP&FPType=Standard&GasType=NG&Na...

    QUESTION: I am looking for Peterson Model # SDPG46-18-17, but I do not see it on your web site. Do you carry it?

    ANSWER: Yes, we do carry it. Here is a link: Peterson SDPG46-18-17 Split Oak Designer Plus

  2. Question #9475 - Posted: 4/8/2014 1:29:42 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/default.asp

    QUESTION: On a RH Peterson burner, what is the difference, or pros and cons from a G45A Burner and a G45 Triple T Burner? Is it just the certification or is there a performance difference as well?

    ANSWER: The G45A has a manual safety pilot that is factory installed and tested to meet ANSI approval. The G45 is a match-light burner with no safety pilot. If you purchase a G45 and add a safety pilot it will not be installed and tested at the factory. Otherwise, both burners are identical and both are Triple T. Many cities and states require ANSI approval, so if in doubt, it is best to purchase an ANSI approved burner.

  3. Question #9474 - Posted: 4/7/2014 1:30:01 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/model.asp?SetModel=PL-CHASG10-16&FRONTWIDTH=32&BACKWIDTH=20&...

    QUESTION: I have a zero clearance fire place that had the chimney removed when the house was re-roofed. I never intend to burn wood in it again. It never worked very well burning wood. Ventless is an option, but what are my options for a vented log? I would not want to take the vent through the roof. Can it be vented to a side wall? What are the limitations for running vent horizontally (how long)? I live in St. Louis, MO. Firebox can handle a G10 18

    ANSWER: There are no options to vent a previous wood burning fireplace out a side wall, it must be vented through the roof as it was before in order to burn any gas logs, vented or ventless. Please do not burn anything in your fireplace without having he chimney installed as it was before...it will not be safe.

  4. Question #9467 - Posted: 4/3/2014 7:53:00 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/installers.asp

    QUESTION: I am looking at model HRG45-24-P-SS. the gas line comes into the fireplace from the left side (looking forward at the fireplace). Will this burner-log set work? When I looked at the instruction manual, the diagram shows the gas line on the right.

    ANSWER: You can easily reroute the gas line to the left side using a longer flex tube or black pipe. Often times, depending on the location of your gas line, the flex tube that comes with the burner will reach the other side. If it does not, then you can purchase a longer flex tube from us or from a hardware store or home center.

  5. Question #9455 - Posted: 2/17/2014 9:10:47 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/vented/24-inch.asp

    QUESTION: Cn I just order the burner since I already have a 24 " split oak log set? My existing burner is leaking. Am looking at the G46-24 SPK.

    ANSWER: Yes, if you already have Peterson logs, we can supply you with the correct burner that is matched to them. The G46-24-SPK is one of the burners that is compatible with your logs. Give us a call and we will process your order over the phone. Call: 1-800-201-1193.

  6. Question #9454 - Posted: 2/17/2014 9:09:00 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/why-ventless-gaslogs-smell.asp

    QUESTION: Hello, Thank you for taking my question. We have install installed a ventless fire place Patterson.. The unit was complete but had no logs supplied. Bought new logs. Can any ventless log be used with the burner. Or are the logs and burner sold only in sets?

    ANSWER: Warning: Do not use any logs other than those designed for the particular burner you own. The logs are in fact specific to the burner. It is critical that you get the right logs because if the flame hits the logs differently than the original design it can cause the gas to burn incompletely. Incomplete combustion of gas results in the additional byproducts of soot and carbon monoxide (lethal and odorless), which will be introduced directly into your home.

  7. Question #9449 - Posted: 2/1/2014 3:26:13 PM

    Gas Logs Question

    http://www.hansenwholesale.com/answers.asp?ProdType=LOGS

    QUESTION: I have a Peterson 18" gas log set I'm installing myself. The installation manual shows a right hand gas supply. My fireplace has a left gas supply. Can I just disassemble the burner pan and convert it to a left gas input and put the cap on the right? Or do I need to run a lot more pipe all the way from the left side to the right side? Thanks

    ANSWER: If you have a matchlight system (one without a safety pilot) then you can switch the plug and orifice from one side to the other to convert it to left gas input. If you have a safety pilot, it depends on the pilot system you have: some of them can and other cannot be reversed...it will be obvious because the pilot mechanism would be upside down when reversed. If such is the case, then either get a longer flex tube from a home center, or reroute the gas line using black pipe and elbows.

  8. Question #9448 - Posted: 1/30/2014 9:12:57 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/why-ventless-gaslogs-smell.asp

    QUESTION: We have a "Fire-Gear" vent-less propane fireplace. It gives off a noxious odor. We had it service but to no avail. We are thinking of replacing it w Peterson brand. Will this take care of our problem?

    ANSWER: Fire Gear is not a top quality brand like Peterson, so it is quite likely that replacing them with a better quality vent free gas log from Peterson will help reduce the odor. But it is important to be aware that ALL ventless appliances produce some odor because all of the byproducts of burning the fire are introduced into the room. Propane can be particularly worse than natural gas because the quality of the propane varies from supplier to supplier. The more impurities there are in the propane, the more potential there is for smell coming from burning a ventless gas log. Although we would love to sell you a new gas log set, we cannot guarantee that it would eliminate or reduce the odor. The only way to find out would be to install them. At least in that manner, you would know for sure whether it is the log set causing the problem, or the gas you are being supplied. Read more about what causes vent-free gas logs to produce a smell:

  9. Question #9447 - Posted: 1/30/2014 8:46:17 AM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/vented-vs-ventfree.asp

    QUESTION: My daughter has vented gas logs in her bedroom which is about 24x36. It is her primary heat system. Recently we noticed that the ceiling and top part of her walls were becoming covered in black soot. Why would the logs start this and is it dangerous to them. They have a 1 month old that sleeps in that room as well. I have noticed that some of the baby toys that are plastic have the black on them also. I am very nervous about this. Would it be better for them to get ventless with a heatalator?

    ANSWER: Please stop using the gas logs immediately, it is dangerous to use them if they are producing soot. Where there is soot, there is also carbon monoxide, which as you know is a lethal odorless gas. You need to have your gas logs serviced or replaced because they are no longer burning cleanly as vent free gas logs should. Some Heating and AC companies are qualified to service ventless appliances, so use your local yellow pages to call around. Or, you can use the resource on this page to locate a professional who is qualified to service your gas logs: Locate a Gas Log Service Professional.

  10. Question #9446 - Posted: 1/26/2014 3:14:39 PM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/ventless-btu-calculator.asp

    QUESTION: I have a Peterson real fire vented gas log system 18inch in my fireplace for several years and am very satisfied. I would like to change just the burner to make a vent free system for more heat. Is this possible. Thanks

    ANSWER: Unfortunately you cannot change just the burner in order to create a ventless gas log set. The burner and logs must be designed to work together, so you will need to buy a complete setup. The reason is that ventless gas logs must burn in a very controlled manner in order to burn cleanly. Any disruption to the way the flame burns, such as touching the logs in the wrong place, will cause the gas to burn incompletely and produce exhaust...including carbon monoxide and soot. So the flames cannot touch the logs in any manner in which the system was not designed...which means you must have the correct logs and they must be stacked exactly as described in the owners manual.

THE END

R.H. Peterson Gas Logs
(Go to: Gas Log Homepage)
R. H. Peterson Gas Logs Logo

FIREPLACE TYPE
Indoor Outdoor
Natural Gas Propane
Standard See-Thru

What is Standard or SeeThru?

SHOP BY LOG SIZE

Help me choose!


Gas Log Size Calculator

Front Width Back Width Depth
" x " x "
(numbers only round to nearest inch)
Advanced options...
(How do I measure?)
CONTROL TYPE

Help me choose!

HELP
Gas Log Installation

Locate an Installer

Energy Star Ceiling Fans and Lighting Energy Star Products Energy Star Ceiling Fans Energy Star Lighting

Consumer Sales
Product Info and Ordering
Phone: 1-800-201-1193
Phone2: 1-562-594-1249 (outside USA)
Fax: 1-562-626-8270
Email: Information Request
Mon-Fri 7am-6pm, Sat 7am-5pm, Sun 8am-6pm (PST)

Customer Service
Questions About Pending Orders
Phone: 1-800-607-2665
Phone2: 1-562-594-1249 (outside USA)
Fax: 1-562-626-8270
Email: Customer Service
Hours: Mon-Fri: 7am-5pm (PST)

Trade/Resale Accounts
Resale, Contractors, Etc.
Phone: 1-800-365-3267
Phone2: 1-562-594-1249 (outside USA)
Fax: 1-562-626-8270
Email: Information Request
Hours: Mon-Fri: 8:30am-4:30pm (PST)

Terms/Conditions/Privacy
About Us
Ceiling Fan Blog

Corporate Mailing Address and Warehouse
Hansen Wholesale 11132 Winners Circle Suite 100, Los Alamitos, CA 90720

Thanks for choosing Hansen Wholesale
Copyright 1994-2014 Hansen Wholesale

The End