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Gas Logs

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How to Measure for Gas Logs
Front Width x Back Width x Depth

"This is the most accurate way of determining if a gas log will fit your fireplace!"
"NO other website performs these calculations for you like we do!"
(read "About the Center Width" below)

Correctly sizing your Gas Logs for your Fireplace is VERY IMPORTANT!

CLEARANCE IS CRITICAL! Every type gas log burner system must remain a certain distance from the side walls of the fireplace in order to stay cool, which is referred to as "Clearance" (see Fig.3 below) . The amount of clearance varies depending on the type of gas log burner and controls you select. When the clearance is not met, the gas valve can overheat and melt, which will cause your log set to stop working...and can also create an unsafe condition. Although you might think that the biggest logs that will fit into your fireplace will look the best, you must also consider how much space must be left on each side of the burner system in order for it to be safe. Over-sizing of gas logs is the #1 cause of failure with gas logs. Follow these instructions carefully to avoid making a costly mistake!

Measure the: Front Width x Back Width x Depth

Fig.1 Masonry Fireplace

This example shows a masonry fireplace with a marble front that is flush with the firebrick on the inside, so the Front Width measurement is the same as the actual fireplace opening.
Fig.2 Metal Prefabricated Fireplace

Here's a prefabricated fireplace where the width between the fireplace walls is less than the fireplace opening, so the Front Width measurement is smaller than the fireplace opening.


FRONT WIDTH: The front width is the actual "usable" space between the side walls inside your fireplace at the front, not necessarily the width of the opening. If the facia around your fireplace opening is even with the side walls of the fireplace on the inside, then the Front Width measurement is the same as the fireplace opening (see Fig.1). If you have a prefabricated metal fireplace (zero clearance fireplace) where the opening is actually wider than the width between the side walls inside, do not base the front width on the size of the opening, measure the functional width between the side walls of the fireplace (see Fig.2).

BACK WIDTH: The Back Width is pretty self explainitory and is the measurement of the narrowest width in the back of the fireplace (see Fig.1 and Fig.2 ).

DEPTH: The Depth is simply the measurement from the front to back of your fireplace on the inside. The Front is at the point from which you took the Front Width measurement (see Fig.1 and Fig.2 ).

Height: The height of your fireplace opening needs to be at least 18" for most gas logs. This may vary somewhat between models, but if your opening is at least 18" tall, you will not normally need to be concerned about the height of your fireplace opening..

About the Center Width: Use this measurement to confirm our calculations! The Center Width is the inside width measurement taken 7" back from the point from which you measured the Front Width. The "Center Width" is not a measurment that you enter into our Gas Log Size Calculator, it is automatically calculated based on the Front and Back Width dimensions that you enter into our calculator. This is approximately where the burner and pilot will be positioned when your logs are installed, which is the point where the clearances are critical. This is the most accurate way of determining if a particular gas log will work in your fireplace and no other website performs these calculations for you. So when you see reference to the required "Center Width" for our gas logs, you will know what this is referring to (see Fig.3). Compare this measurement to our calculations before making your purchase to ensure the logs you order will fit!

Enter your measurments into our calculator to find the right size logs for your fireplace. Our calculator automatically allows for the "Proper Clearance" based on the type of controls you select. Results are sorted by the "Largest Logs" that will fit your fireplace while maintaining the required clearance.

Fig.3

(*) The Asterisk shows where clearance from a safety pilot is required and calculated

Fig. #3 above shows how the clearance from each type of gas log burner or control is required from the side walls of the fireplace. The critical measurement is the center width of the fireplace where the burner is placed. Our calculator automatically calculates this distance and takes into account the required clearance for every gas log burner system that we offer. When you use our calculator, only logs that will fit your fireplace will show up in our search results.

Read more about Clearances Here!


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Answers to Recent Gas Logs Questions Posted To This Page
  1. Question #9527 - Posted: 2/2/2017 8:52:54 PM

    Gas Logs Question Model PL-CHCRG46-30-17P

    http://www.hansenwholesale.com/gas-logs/model.asp?SetModel=PL-CHCRG46-30-17P&LogSize=30

    QUESTION: 1. How large in diameter will the vent hose need to be for this type of unit?...Thanks, Frank

    ANSWER: I am assuming that you are referring to the size of the chimney. This gas log is designed to be installed in an existing wood burning fireplace that is capable of burning wood. If you do not already have a wood burning fireplace, then you cannot install this gas log without one. With that said, the minimum required vent depends on the height of the chimney. Please refer to this chart copied from the installation manual for specifics:


  2. Question #9526 - Posted: 12/29/2016 9:05:21 PM

    Gas Logs Question

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

    QUESTION: I have a gas burning fireplace with a broken log. It was originally a wood-burning fireplace built in the early 1960s. It has a damper which is always open when burning. The fireplace was converted professionally to gas sometime before 2000. I converted it to remote-control lighting in 2010 using a reputable firm. Sometime later, one of the logs was dropped and cracked in half. It is held together by internal wires. I would like to replace one log rather than the entire set. Possible?

    ANSWER: It is possible, but that depends on the type of gas log set you have. If you can email us a picture of your gas logs, maybe we can find what you need. Email pictures to: gregt@hansenwholesale.com

  3. Question #9525 - Posted: 12/29/2016 8:58:26 PM

    Gas Logs Question

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

    QUESTION: I have a classic fireplace 26" in the back, 36" in the front and 26" depth. I live in a two story house built in 1935. The furnace broke and needs to be replaced. I'm looking for something to install in my fireplace to warm up the living room. I live in California so it has to be vented. What do you recommend to keep my room the warmest it can be? log set or would an insert be better?

    ANSWER: A vented gas log is not going to provide very much warmth for your room. Since you cannot install a ventless gas log in California, you are left with the option of installing a gas insert. I would suggest taking a look at the Real Fyre Direct Vent gas insert.

  4. Question #9524 - Posted: 12/29/2016 8:51:36 PM

    Gas Logs Question

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

    QUESTION: i live in a 100 year old house and my fireplace was for coal and has a metal firebox. i have burned wood in it until last year, until we realized there was some leakage of smoke from the chimney upstairs. Would it be safe to use vented gas logs? Would we need to line the chimney like we would need to if we continued burning wood?

    ANSWER: Burning a vented gas log produces smoke just like burning real wood, so yes, you would have to reline or repair the chimney. I would suggest considering a ventless gas log so do not have to worry about smoke.

  5. Question #9523 - Posted: 12/29/2016 8:45:42 PM

    Gas Logs Question

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

    QUESTION: what size and kind can I put in a woodstove "MORE HEAT" that has a door 20 BY 8.5 FIREBOX 28 BY 18 AND IS 12 INCHE DEEP and will they warm the stove enough to product heat with the fan.

    ANSWER: Unfortunately, you cannot install gas logs in a wood stove. Wood stoves are designed to operate with much lower draft than gas logs and the venting does not meet the minimum venting diameter. Even more, air tight wood stoves are designed to be burned with the doors closed, which is a definite no no when it comes to burning gas logs since they must be burned with the doors opened. There are other reasons why gas logs will not work in a stove, but I will not belabor that here. For more details, read more about Where Gas Logs Can Be Installed.

  6. Question #9522 - Posted: 12/29/2016 7:59:50 PM

    Gas Logs Question

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

    QUESTION: I have a 24" peterson gas log set. The gas line in the fireplace is slightly larger than the connection for flex tube that leads to the gas burner. Can I add a smaller fitting to attach to the line leading to the burner?

    ANSWER: That should not be a problem unless the incoming gas pressure is higher than allowed by the installation manual, so you may want to check that.

  7. Question #9521 - Posted: 12/29/2016 7:53:16 PM

    Gas Logs Question

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

    QUESTION: I occasionally turn our ceiling fan on low with the blades drawing the air upward while using our ventless gas logs. Our installation manual says a ceiling fan should not be used when the ventless logs are on. The flame of the gass logs appears to be unaffected. Is there a problem in having a ceiling fan on at the same time as the ventless gas logs? Thank you.

    ANSWER: Running a ceiling fan to destratify the air in your room makes sense from a heating efficiency/conservation standpoint, so I understand why you are asking your question. The responsible answer is that the owners manual says not to run your fan when you are operating your ventless gas log, so we cannot tell you that it is OK to do so. With that said, drafts can certainly cause ventless gas logs to NOT burn correctly and start producing toxic odorless Carbon Monoxide. It is safer for the manufacturer to tell you not to run your fan at all in order to avoid a potentially hazardous outcome rather than suggest that you can run it on a low speed in reverse with no ill effect. They cannot test the actual impact of doing so in your particular room. Their ultimate concern is to prevent any draft from affecting the flame. Whether you decide to follow the instructions is ultimately your decision...I will leave it at that.

  8. Question #9520 - Posted: 12/29/2016 7:31:40 PM

    Gas Logs Question

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

    QUESTION: I do not really need the heat, and I have a fireplace already,but, the damper is either all the way open or completely closed. can I get that fixed so i can have it open part of the way so all the hot air does not go up the chimney thereby kind of making it silly to have one

    ANSWER: Technically, a vented gas log is supposed to be burned with the damper completely open. Plus, you cannot ever completely close the damper just in case there is a gas leak, so there is a clamp that is included with the burner system that gets attached to the damper to prevent it from ever closing completely. So if you do not really need the heat, then the way your damper operates is sufficient for a vented gas log. Whether you close the damper slightly to preserve some of the heat will not make much difference, you will get most of the heat from a vented gas log radiated into the room from the ceramic in the logs themselves. If you are really concerned about getting heat (which you say you are not), then you should consider buying a ventless gas log.

  9. Question #9519 - Posted: 12/29/2016 7:02:36 PM

    Gas Logs Question

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

    QUESTION: Question - Are there burners or logs that are better for use with propane to achieve the best flame presentation? Currently my propane flame in my FP is not as robust as I would like. Just curious if there are options that are better for propane specifically.

    ANSWER: Whether you are burning natural gas or liquid propane, each type of burner is configured for optimal performance for the gas you are using. So you would need to make sure you order a burner system for Propane gas, otherwise it will not perform properly. With that said, if you want the most robust flame, we would recommend either the G4 or G45 burners since they operate at the highest BTU (the most flame). However, neither of these may not be the best choice for your particular fireplace depending on the type of fireplace you have and the dimensions. Please send us some pictures of your current setup so we can see what you have and make further recommendations. Email pictures to: gregt@hansenwholesale.com.

  10. Question #9518 - Posted: 12/29/2016 6:53:51 PM

    Gas Logs Question

    http://www.hansenwholesale.com/gas-logs/gas-log-burn-cost.asp

    QUESTION: Where do I find a remote control for my gas logs? And how much?

    ANSWER: Gas log remote controls are not universal in design. They are made as a transmitter and receiver combination, the receiver usually a built-in component of the gas log valve and burner system. So if you have an existing gas log with a remote and you are looking to replace a remote that is no longer working, you are going to need to contact the manufacturer of the gas log system you own and see if they can supply you with a replacement remote. If you are wanting to add a remote control to an existing gas log, that is a different story. In most cases, you will need to replace the entire burner system with one that is remote capable. Replacing the burner system may also require you to replace the logs since not all logs are compatible with all burners. If you email us some pictures of your fireplace we may be able to offer more direct advice. Send your pictures to: gregt@hansenwholesale.com...or just give us a call at: 1-800-201-1193.

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R.H. Peterson Gas Logs

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Gas Log Size Calculator

Front Width Back Width Depth
" x " x "
(numbers only round to nearest inch)
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Which should I choose...
Vented or Vent-Free?

VENTED GAS LOGS
VENT-FREE GAS LOGS
Ventless gas logs are burned with the damper closed. They look less realistic but produce more heat.
Read about Vent-Free Gas Logs!

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Enter the BTU rating of any gas log set to find out how much gas it uses!

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