Why Buy From Hansen Wholesale?
 
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
What is National Ceiling Fan Day? Learn how ceiling fans help conserve energy and are better for the environment... Click Here!

Vented - vs - Vent Free Gas Logs
Find out which is best for your home...vented or ventless!


Similar Pages: Gas Log FAQs page! Why do Ventless Gas Logs Smell

Basic Overview

Vented Gas Logs Require a Fully Functional Wood Burning Fireplace, Ventless (or Vent Free) Gas Logs can be installed in either a wood burning fireplace, or a ventless fireplace that is rated for aftermarket ventless logs. Ventless gas logs will produce more heat, while vented gas logs will look much more realistic. Read the Pros and Cons of each below:


Vented Gas Logs:

"Fully Vented" gas logs must be burned in a fireplace that is capable of burning real wood and must be burned with the damper open. The reason for this is that they do not burn the gas cleanly and create exhaust that is very similar to burning a real wood fire. This exhaust needs to be able to go up the chimney. The real beauty of vented gas logs is that they produce substantially more yellow flame than ventless logs which makes them look far more realistic. The downside is that most of the heat goes right up the chimney.

However, In most cases, you can offset this heat loss by slightly closing the damper...but you must be careful that the exhaust from your logs is not coming into the room because, just like burning real wood, it contains Carbon Monoxide. A good way to test this is to turn on your gas logs with the damper slightly closed. Hold a lighter or candle in front of the fireplace opening near the top. If the flame from the lighter (candle) is being drawn in toward the fireplace, then you are OK. If the flame is standing still or pushed out toward the room, then your fireplace is not drafting enough and you must open the damper more.

Positive Features of Vented Gas Logs:

  1. Extremely realistic flame pattern that looks like a wood fire.
  2. Flame is much taller than ventless logs
  3. Flame dances and wraps around logs like real wood.
  4. Does not require a CO2 detector
  5. Since the damper is open, most of the smell will go up the chimney

Negative Features of Vented Gas Logs:

Do's and Dont's for Vented Gas Logs
(Additional information you should read before buying Ventless Gas Logs)

  1. Less heat than ventless logs (probably won't heat your room)
  2. Uses slightly more gas than ventless logs

Check out some Vented Gas Log Installation Manuals Here before you purchase.


Ventless Gas Logs:

Ventless gas logs (often referred to as "Vent Free" gas logs) have specially designed burners that burn the gas cleanly and produce almost no exhaust...somewhat like the way a gas range in a kitchen works. Since there is little or no exhaust, they can be burned with the damper closed.

The beauty of this type of system is that 99.9% of the heat produced by the gas logs goes into the room, so they produce substantially more heat than their vented counter-parts. However, there are many negative features commonly associated with ventless logs that you must be aware of before you decide to purchase them:

Positive Features of Ventless Gas Logs:

  1. Much better heat output than vented gas logs
  2. Less pollution
  3. Slightly less gas consumption

Negative Features of Ventless Gas Logs:

Do's and Dont's for Ventless Gas Logs
(Additional information you should read before buying Ventless Gas Logs)

  1. The main byproducts of burning gas cleanly are Carbon Dioxide and Water Vapor. Because of this, ventless gas logs will introduce excess moisture into your home which can result in mold or mildew.
  2. You must be careful not to burn your ventless logs for extended periods of time with windows closed, otherwise they can potentially deplete the oxygen in your home.
  3. If you burn your ventless logs for more than an hour or so, you must crack open a window to allow air into your home to replace the oxygen burned by the ventless logs. This will introduce cold air into the room and offset some of the heating benefits that ventless logs claim to have.
  4. Ventless logs produce an odor that many people equate to the smell of burning kerosene. So if you have a sensitive nose, you may not be able to handle the smell and will be greatly dissatisfied with ventless logs. On the other hand, we've heard some people who like the smell because it reminds them of their childhood days at Grandma's house. (Read Why Ventless Gas Logs Smell)
  5. Ventless logs can cause eye irritation and coughing spells to those who are sensitive.
  6. Ventless logs are not legal in California as well as some cities and municipalities. However, you can still purchase ventless logs from us if you live in California...you will just have to burn them with the damper open (which really defeats the purpose).
  7. Ventless logs are required to have an ODS (oxygen depletion system) as well as a CO2 detector...which might tell you that there are some risks involved in operating them if these systems fail.
  8. The flame pattern with ventless logs is not nearly as realistic in comparison to vented logs. Because the gas must burn cleanly, the flame height is very low, it is more blue than yellow and appears to be more nerveous and less lofty.
  9. Also, you will find that the flame does not dance around like a real wood fire and very little of the flame actually touches the logs. The reason for this is that when the flame touches the logs, it gets cooled off and does not burn cleanly and starts to produce soot and exhaust gases.
  10. Installing vent-free gas logs is not a DIY job. Installation must be performed by a professional who can do the proper tests on your gas pressure and make sure that the installation meets building codes and follows the specifications required.
  11. Clearances to combustables is different than that of wood buring fires or vented gas logs. If there is a mantel above the fireplace, you may need to install a hood to divert heat away from it. You should check the Installation Manual for the Ventless Logs for clearance requirements before you order them.
  12. There are also BTU limitations based on the cubic feet of air available to your room. The maximum BTUs allowed is calculated using this formula: Room Width x Room Length x Ceiling Height x 20.
  13. Ventless gas logs may not be legal in a bedroom or confined space (differs with local building codes).
  14. Other restrictions apply with each of the various burner systems available, so again, you should read the installation manual pertaining to the ventless logs you are considering "Before You Purchase".


Bottom Line: We highly recommend that you purchase vented gas logs. You will be much happier with flame that they produce and less likely to experience discomfort from odors or irritation. We only recommend ventless logs when maximizing the heat output outweighs all of the other negative aspects.


Related Articles:
Have a Question About? Ask an Expert!
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
R. H. Peterson Gas Logs Logo
Gas Log Size Calculator

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

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!

OUTDOOR GAS LOGS
Gas Log Information
Gas Usage Calculator

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

BTUs
(number only - no commas)

About this calculator

Gas Log Installation

Locate an Installer
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!

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