Alterna VF FireGlitter Video
This is video of our new lower profile AFM-series of ALterna FireGlitter flame and glass effect for vented and vent-free use.
Rasmussen Gas Logs have been creating warm hearths for 50 years. We have a broad offering that includes vented and vent-free burners, a veritable forest of concrete logs offered in sets from 12" to 96" as well as FireBalls, FireShapes and FireStones. This blog will inform you about our company, our offering and the technical aspects of our products. Use the search feature at the upper left corner to find a topic. Please send comments or questions to gasblogs@rasmussen.biz
This is video of our new lower profile AFM-series of ALterna FireGlitter flame and glass effect for vented and vent-free use.
QUESTION: How do you size a log set for a see-through fireplace?
Labels: double face, see-through, sizing
Question: We just moved into a house that has one of your Chillbuster Vent-free Gas Log sets. The previous homeowner did not leave the instruction manual. Can you help?
1) Thoroughly read the instruction manual; you may download installation/instruction manuals from our website at http://www.rasmussen.biz/logs/instr.html
2) Perform the ODS cleaning advised in the instructions found at http://www.rasmussen.biz/troubleshooting/chillbuster_vent.htm
3) Ensure that all air intake regions of the lower part of the burner, as well as the burner ports themselves, are clear of dust, lint or other debris that would block proper air intake or gas flow. Please view the photos found at http://www.rasmussen.biz/troubleshooting/vf_burners_clean.htm for location of these regions.
4) Ensure that the logs are arranged in accordance with the instructions. Improper log placement can result in substandard performance.
5) Ensure the firebox is clean of any soot or residue from previous wood burning that the previous owner may not have, but should have, removed before placing the Chillbuster into service.
Labels: Chillbuster, Instructions, manuals, old set, unvented, vent-free, ventless
Question: We recently moved into a new home that has one of your unvented gas logs in the fireplace. I’m afraid to light it because no instructions or materials were left for the unit. Is it possible to download the instructions booklet from the manufacturer?
Labels: Instructions, manuals
Below are the sizes of the individual FireStones used in our various FireStone Assortment Packs.
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QUESTION: Do the vented fireplace logs have to have the flue vent open even when it is not being used? Some one told me that in Maine, the flue has to be permanently fixed in the open position by the installer. Of course, this would allow a lot of heat to go up the chimney all winter long.
QUESTION: I read the post on you blog re: "FireBalls/FireStones/FireShapes with Gas Fireplace" . Any progress since then with a possible certification of these products for a gas fireplace appliance? Is there any way we could just use the FireShapes as replacement for existing gas logs without changing the existing burner?
We'd love to replace our ugly logs set with the unique, modern and innovative design of your products...
ANSWER: Because the Gas Fireplace Appliances are designed and certified by other companies, for liability reasons I will never say that it is proper or safe to alter their design. Unless the unit is retested with the alteration and successfully passes all tests in the standard, one cannot promote that such an alternative design is safe or viable. Practically speaking, this will not happen, due to cost and competitive reasons.
Labels: ALTERNA
QUESTION: What is the difference between “See-Though” and “Double Face”?
ANSWER: Same thing, different words. The terms may be used interchangeably. Fireplaces which have two sides open, front and back, are termed “See-through” fireplaces. They require “Double Face” gas log sets. DF sets have two front logs (rather than a larger front and smaller rear logs used in Single Face sets) and a parallel grate (teeth upturned on the front and back), so that the appearance is the same from both sides of the fireplace.
QUESTION: We have 9 ft. ceiling and looking for ideas to draw the heat down.
A ceiling fan in rotating in reverse will push the heat downward. A word of caution if you do this – ensure the resulting draft does not adversely affect the flame characteristics of the gas log set, as this might impact the clean burn of the set.
Rasmussen neither manufactures nor do we have certified a blower for any of our gas log sets. A blower can interrupt the combustion process and cause soot to be produced, which is then blown into the room. We do not recommend the use of a blower with any of our sets.
QUESTION: Is it a normal result of the operation of a vent-free gas log set for the inside of the windows to get a film on them? This cleans off easily but is not long before it comes back. I was curious as to whether this is normal or whether some adjustment may be needed?
ANSWER: The “film” you refer to on the inside of your windows is an accumulation of water vapor. Water vapor is a natural by-product of the combustion of gas and occurs with all gas burning appliances. One ounce of water per 1,000 BTU/hour is inputted into the living space with a vent-free heater. This is more than a quart of water per hour when your set is operated on high.
In dry climates, many people welcome this increase in humidity. Some people have humidifiers to accomplish the same effect.
Moisture accumulation is an indication of a lack of fresh air input and exchange with the outside. If you wish to decrease the film on your windows, you must either vent some of the products of combustion from the gas log set up the chimney or dilute the water vapor indoors with fresh air from outside. Without an adequate supply of fresh air to dilute the water vapor and the means to allow it to pass through to outdoors, the water vapor will adhere to all surfaces in the home. The same is true of a shower or a kitchen range. A home of tight construction (vapor barriers, weather-stripping, etc.) with an inadequate supply of fresh air will trap moisture, odors and fumes in the house.
Ultimately, fresh air is the solution for all indoor air quality issues, including moisture accumulation.

QUESTION: Do I need glass doors on my fireplace before I install a gas log set?
ANSWER: Glass doors are either a personal choice or a local code requirement, but are not a requirement for installing a gas log. Glass doors are decorative and functional. They permit you to close off the loss of warm air up the chimney without having to reach into the fireplace to close the damper. If you are in a region that requires the damper to be permanently blocked open or removed, then glass doors can provide tremendous energy savings.
A gas log set must always be operated with the glass doors open for the following reasons:
1) Cooling air being drawn in from the room is needed to pass over the control valve and components in order to prevent overheating and premature, unwarranted failure;
2) Adequate air for proper combustion.
3) With the doors closed, air drawn in from floor level registers in the doors may create a high speed rush of air across the burner, resulting in wild flames and improper combustion. Opening the doors can equalize the air flow, although you still may need to close these registers.
4) Closed doors create a barrier to heat entering the living space.
It is entirely appropriate to close the glass doors after turning the set off in order to keep the heat in the room after use.
QUESTION: Can your CS Burner with legs be used in a vent-free environment?
ANSWER: The CS Burner is only for use in a fully vented fireplace
in which it is safe to burn wood. The CS Burner, like all pan-type vented burners, burns with a yellow, smoky wood-like flame that produces soot and other combustion products. These must be fully exhausted up the chimney to prevent harm to
health and property.
Question: Why is it required to have a safety control for propane gas logs.
Question: How do I remove soot from my vented gas logs?
Answer: A vented, Flaming Ember or Custom pan-type burner system has the advantage of providing a very realistic replication of a wood-like flame without the need to cut, stack or carry wood, worry about sparks or chimney fires, or clean up ashes. The trade-offs for the yellow flame are the production of soot and the corresponding requirement that the damper be open and the chimney be venting properly in order to allow the soot and products of combustion to be vented out of the firebox. In the instruction manual, under “Customer Responsibility”, we state “Your gas log is designed to burn with a natural smoky yellow flame that produces soot.” Under “Maintenance”, we mention that you should periodically use a brush to clean the logs.
A simple, effective and low cost method of removing soot from a gas log set is to first heat up the logs for a few minutes, then spray the sooty portion of the logs with water from a spray bottle. With the logs hot, the water spray turns to steam, loosens the soot from the logs and sends the soot up the chimney with the natural draft. Special soot cleaners sold by fireplace shops do the same thing, but at a cost to you.
The logs can also be cleaned by brushing the soot off, or by removing the logs from the fireplace and hosing them with water.
Question: Does Rasmussen offer a blower or heat exchanger for Chillbuster Vent-Free or Rasmussen Vented gas log sets?
Boy, our products sure do last!. These are recent photos of a "Fire Funnel" fireplace and a Driftwood Stump on Custom Sand Burner that Rasmussen made in 1961. They are installed at the Alamitos Bay Yacht Club in Southern California. Still looking good!
couple of the
advertising sheets and another photo of a 1962 installation, for posterity's sake.
QUESTION: Do you make a vent-free set with logs 42 to 48 inches long?
ANSWER: Your fireplace is rather large for a vent-free gas log set. The national standard for vent-free heaters limits the maximum gas consumption to 40,000 BTU/hour. This same amount of gas is our limit in designing vent-free gas log sets, regardless of the size of the set. In order to get an adequate flame, our 30" sets use the same burner system as our 24" sets. Any "stretching" of the burner wider than our 24" size would result in unacceptably small flames. I know of no manufacturer who produces a vent-free set larger than 30”.
Should you decide to install a vent-free set into your fireplace, I caution you about having too great of heat expectations. This large enclosure will
If your fireplace properly vents all products of combustion (no spillage of smoke into the room), we have several log sets in the sizes you desire, which will give you a full, woodlike flame display and a large bed of glowing, radiant embers.
Question: One of my fireplaces has a left hand side gas connection. Can your "F" and/or "FX" burners be converted to left hand connection?
Would there be a problem with any of the remote controls?
Answer: For match lighted ignition, the burners may be plumbed to either side, as the burner pipe of the F and FX burners is threaded both internally and externally on both sides.
However, when used with any of our safety pilot kits, including remote control, we recommend only installing them on the right side. 
The pilot bracket we use provides heat protection to the cold junction of the thermocouple from downward radiation that might bounce off the underside of the logs when the pilot is installed on the right side. When installed on the left side, the pilot will be turned upside down, losing the heat protection, which may result in nuisance shutdown of the pilot.
If your gas line is on the left side and the inlet to the safety control/burner is on the right, merely plumb the gas along the back wall of the fireplace behind the gas log set so the hook-up to the right may be accomplished.
Question: I have
a ventless free standing fireplace with a firebox in it, which came with alcohol fire gel cans that I light up with a match. Will your firestones work in a fireplace like this?
Answer: No. Your fireplace is constructed to only withstand the relatively low heat of the gel cans. It would not withstand the heat generated by any gas log set (or FireStones), whether the set was for vented or vent-free.
The burners we use with our FireStones sets are for use only in a fully vented fireplace in which it is safe to burn wood.
You could use the FireStone castings alone (no gas log burner - only the alcohol gel) in your fireplace, replacing the logs that came with the fireplace to acheive the look you desire.

Question: I am interested in a more contemporary feel for our new addition. I was considering the fireglass as it gives off more heat than the gas logs. I prefer the look of your FireStones. Could you tell me if the firestones give off as much heat as the fireglass?
Answer: I respectfully disagree with your assertion that the fire glass gives more heat than gas logs. The heat output of a vented gas log set is primarily dependent on the efficiency of the particular fireplace and chimney system in which it is being operated. This efficiency will vary from fireplace design to fireplace design, and from house to house, depending on environmental factors, such as drafts and ambient temperature.
Fireplaces were originally designed for cooking and are very inefficient as heaters. They will create a measure of warmth, but how much is dependent on how efficiently the fireplace draws air from the room to exhaust the products of combustion up the chimney. The better job it does in venting, the worse job it does in heating. A vented gas log must have the damper fully open whenever the gas log set is in operation, as the burner is designed to burn with a yellow, smoky, wood-like flame that produces soot, carbon monoxide and other products of combustion. If these combustion products do not exhaust up the chimney they will enter the living space, posing a potential hazard to life and property.
With a traditional gas log set, the gas logs absorb heat from the fire, then radiate the heat back into the room. This is most evident just after you turn off the flame – you can feel the warmth for quite a while afterwards.
Firestones will do the same, as they are made of the same material as our gas logs. The only difference is that they do not stand as tall as the logs, therefore they do not present as large of a radiant surface towards the room as logs do. The fire glass is even lower to the floor that FireStones.
Many people who like the look of the fire glass have enhance this look by placing our FireStones, FireShapes or FireBalls on top of the glass. It really completes the look, and gives more radiant heating surface than the glass alone. Shown are a couple of photos showing the FireBalls and FireShapes used with a layer of glass atop of our CXF burner.
Question: We have a vented pan burner gas log set that has to be vented. Is there any way that this can be converted to a vent free log set?
Answer: Vented pan burner gas log sets are only for use in a fully vented wood burning fireplace. They cannot be converted for vent-free use, as vent-free sets are designed to a very different and more restrictive standard.
Burner design is the biggest difference between vented and vent-free sets. Vented Pan-type burners are designed to burn with a smoky, wood-like flame which will produce soot. All vent-free gas log sets on the market are certified to the national standard for vent-free heaters, ANSI Z21.11.2. By the ANSI standard, vent-free gas log sets must be designed so that they do not produce soot. Rasmussen vent-free sets use a state-of-the-art louvered-port burner. This type of burner is very forgiving when operated under adverse conditions, such as improper log placement or drafts. Such conditions result in the flame impinging on the logs, which cause soot to from our competitors' punched-port burners, but operate clean with the Rasmussen burners.
The maximum Carbon Monoxide allowed by the ANSI standard for vent-free heaters is the lowest permitted by any gas burning appliance (220 PPM air free).
By contrast, the standard for a kitchen range, which is also an unvented appliance, allows up to 800 ppm air free.
All vent-free gas log sets must be equipped with an Oxygen Depletion Shutdown system, which consists of a calibrated pilot and safety control valve. The set must shut down before the level of oxygen reaches less than 18.0% (20.9% is normal; 15.0% can cause death).
The maximum allowable gas consumption by standard for a vent-free heater is 40,000 BTU/hour. This helps limit the amount of the products of combustion that are produced, but ultimately it is the burner design, the positioning of the logs (log can either add to or subtract from the performance of a gas log set, depending on the design) and the experience of the manufacturer that creates a vent-free set that will not only pass the rigorous testing to gain certification, but also perform well in the home environment, which is much more "hostile" than a laboratory situation.
Question: Can your gas log sets be used in outdoor fireplaces?
Answer: Our log sets may be used outdoors. We recommend using volcanic ash as the pan filler rather than sand (the normal pan filler for natural gas), as the volcanic ash will maintain a more balanced flame than sand. Sand tends to pack with moisture. Gas takes the path of least resistance and will flow away from an area of packing to create tall flames at one part of the burner and small at the other. You can always loosen the packed area to restore a better flame, but volcanic ash will maintain a more balanced flame without this maintenance.
The logs are made out of high quality cement and aggregates and are impervious to the elements (fire is more corrosive than rain).
The steel burners we use are more than adequate for years of normal use without going to the expense of stainless steel. You could replace the steel burners four or five times for the additional cost of ones made of stainless steel, which is why we do not make our burners in stainless steel.
We recommend that outdoor fireplaces be match lighted and attended while in operation. You will experience nuisance shutdown of safety pilot controls, as the uncontrolled elements will blow out the pilot, most likely requiring relighting before each use. We do not recommend electronic (pilot on demand) ignition systems either, as they require the maintenance of a pilot flame while the main burner is on, which may be unduly influence by the elements and result in cycling of the main burner – very annoying!
Question: I am interested in the FireBall Sets for a gas fireplace. How would I determine which set woould fit my insert? Also, does the burner have to be changed to use your FireBalls?
Answer: Rasmussen manufactures gas logs and alternatives (such as FireStones, FireBalls and FireShapes) for use in fireplaces in which it is safe to burn wood. If your fireplace is a wood-burning fireplace, you can replace the gas log set with a better
If in doubt about what you have, please email a photo to me.
Question: Does Rasmussen offer either FireBalls, FireShapes or FireStones as a vent-free set?
Answer: Not at this time. FireBalls, FireShapes and FireStones are only for use in fully vented wood-burning fireplaces.
The ANSI Z21.11.2 standard also requires that all vent-free heaters be equipped with an Oxygen Depletion Sensor (ODS). By the ANSI standard, vent-free gas log sets must be designed so that they do not produce soot. .
Issue: Glass Door Use with Gas Logs
Question: I came across a story in a local paper that I believe not only misinformed their readers, but provided information that was potentially dangerous and had the potential of voiding a manufacturer’s warranty.
Here is what they said:
"Today, one of the most important elements to add to a fireplace is a glass door. Not only does this piece finish off the look of the fireplace, but it adds to the energy efficiency of the gas logs."
My question: Without operating the gas logs with the doors closed where is this supposed "energy efficiency" supposed to come from?
What, if anything do we have in our warranties or safety statements that address our policy on this issue? I ran through one manual but was unable to find what I was looking for. It has always seemed that gas log manufacturers have required the doors be open during operation...especially with all the newer safety pilot controls systems in use.
Answer: Increased efficiency can occur by closing the glass doors (or damper) after shutting down the gas log set. Since the need to exhaust the combustion products has ceased, closing the doors keeps the warm air in the room from venting up the chimney.
All of our vented instruction manuals state on the first page: Glass doors must be wide open when burner is lighted to allow air for safe combustion and venting. The vent-free ones have essentially the same warning on page 2.
We state in the warranty:This warranty does not extend to any product manufactured by RASMUSSEN which has been subjected to misuse, neglect, accident, improper installation, or use in violation of instructions furnished by RASMUSSEN.
Use of the gas log set with the glass doors closed would violate this section of the warranty.

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There are several things to consider when selecting a gas log set, in no particular order:

Welcome to the first post of the new blog for Rasmussen Gas Logs. I am Rett Rasmussen, Vice President of Rasmussen Iron Works, Inc. We are a four-generation family business located in Whittier, California. We were founded in 1907 by my great-grandfather Rasmus as a blacksmith shop. Since 1958, when my dad T.R. invented the sand pan gas log burner, we have specialized in gas log sets. Over the years we have gained a tremendous amount of knowledge about gas logs, gas burners, fireplaces, design, product develpoment, manufacturing, business and troubleshooting. The problem we have had is in getting this knowledge outside the walls of our facility in a meaningful manner. Enter the blog.
Evening Cross-Fire Gas Log Set.