Superior LMF30GTA/B Mega-Flame 30" Giant Timbers Logs, Concrete
The Superior LMF30GTA/B is a 30" Giant Timbers set of concrete logs for Superior's Mega-Flame vent-free burner, sized for a 42" firebox. The burner is a triple burner: two cantilevered burners of bright yellow flame rise around 19" tall logs, and a lower burner makes a glowing ember bed in front. The system is heater rated at 99% efficiency with a wood-burning grate look.
The logs ship in two boxes, LMF30GTA and LMF30GTB; order both, plus one MNF24 burner in millivolt, variable or electronic control for natural gas or propane. The set needs a firebox at least 39" wide at the front, 26-3/4" at the back and 28" high, and it's also listed for vented use with a damper clamp. On our store, the same style also comes as the 36" Giant Timbers (LMF36GTA/B); the 30" Mossy Oak (LMF30MOA/B) fits the same burner; the 30" Giant Timbers Outdoor (LMF30GTA/B) pairs with Superior's outdoor stainless burners.
Key Features
- Eight-piece Giant Timbers log set, 30", detailed concrete logs with wood grain texture and color
- 19" tall logs over a triple burner: two yellow-flame burners and a glowing ember bed
- Runs on the Superior MNF24 Mega-Flame burner: millivolt, variable or electronic, natural gas or propane
- Variable burner includes a ProFlame remote; electronic burner includes an EcoFlow touch screen remote
- Heater rated at 99% efficiency; built to ANSI Z21.11.2
- Vent-free with the damper closed, or vented with the GA6080 damper clamp
What's Included
- Right front log
- Back left log
- Front left log
- Charred log
- Middle split log
- Right split crossover log
- Front top log
- Back top log
- Log placement instructions
What to Order With It
Required – Both log boxes (both variants on this page):
- Box A, variant 1/2 (LMF30GTA)
- Box B, variant 2/2 (LMF30GTB)
Required – One MNF24 Mega-Flame burner (natural gas or propane):
Optional – Remotes and wall controls (millivolt burner):
Optional – Decorative and installation accessories:
Specifications
| Model |
LMF30GTA (box 1 of 2) and LMF30GTB (box 2 of 2) |
| Order numbers |
F2100A and F2100B |
| Series |
Mega-Flame vent-free gas logs |
| Log size |
30", for a 42" firebox |
| Logs |
8, concrete, 19" tall |
| Burner |
MNF24 millivolt, variable or electronic, sold separately |
| Burner input |
Up to 40,000 Btu/h |
| Efficiency |
Heater rated, 99% |
| Fuel |
Natural gas or propane, set by the burner |
| Listing |
ANSI Z21.11.2 |
| Venting |
Vent-free; also listed for vented use with the GA6080 damper clamp |
| Minimum firebox |
39" front, 26-3/4" rear, 28" high, 15-1/2" deep |
| Warranty |
Logs and grate: 3 years (see Warranty below) |
Firebox Size and Clearances
| Front width, minimum |
39" |
| Rear width, minimum (measured 15-1/2" back) |
26-3/4" |
| Height, minimum |
28" |
| Depth, minimum |
15-1/2" |
| Side wall |
16" minimum from the fireplace |
| Ceiling |
42" minimum above the top of the fireplace opening |
| Floor |
5" minimum |
| Front |
36" to furniture, drapes and other combustibles |
Superior vent-free fireboxes this set fits: VRT3542, VRT4550, VRT6050, VRE4242.
Installation Requirements
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Where it goes: a solid-fuel-burning masonry fireplace, a UL127 factory-built fireplace or a listed vent-free firebox. Not in a factory-built fireplace whose instructions say it hasn't been tested with, or shouldn't be used with, unvented gas logs.
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Rooms: never in a bedroom, bathroom or recreational vehicle. Some state and local codes don't allow vent-free appliances at all, or allow only vented operation.
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Room size: multiply the room's volume in cubic feet (plus any adjoining room open through a doorway without a door) by 20 to get the most Btu/h it can support, then add up every gas appliance in that space except direct-vent ones. At 40,000 Btu/h this burner alone needs about 2,000 cubic feet. If the total is higher, the space needs extra fresh air from an adjoining room or outdoors.
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Chimney prep: before the burner goes into a wood-burning fireplace, have a qualified chimney cleaner clean the flue and firebox of soot, creosote, ashes and loose paint, and repair any damage. Permanently close outside air ducts and ash dumps, and seal fresh-air vents or ash clean-out doors in the firebox with heat-resistant sealant. Don't seal the chimney damper.
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Above the opening: noncombustible material such as slate, marble or tile, at least 1/2" thick, must run at least 12" up from the opening. Between 8" and 12" needs the GA6050 hood; under 8" has to be extended or the logs run vented. A mantel needs at least 8" of noncombustible material below it, plus the hood if that's under 12".
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Vented use: if the fireplace can't meet the vent-free clearances, local codes require venting, or you prefer it, the GA6080 clamp holds the chimney damper permanently open, leaving at least 39 sq in of flue opening on a 6 to 15 ft chimney or 29 sq in on a 15 to 30 ft chimney. In Massachusetts the damper has to be removed or welded fully open for vented use.
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Logs: unpack both boxes and check every piece. Following the placement instructions, the right front log slides in against the lip of the black metal base, the grate and the round burner tube, then the back left log, front left log and charred log, the middle split log (split side forward) around the burner tube, the right split crossover log, and the front top and back top logs on the holes and pegs in the logs below. With the burner on HI, no flame should touch any log.
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Embers: the system comes with Platinum Bright Embers and Glowing Embers. Separate the Platinum Bright Embers and set them on the front flat burner just behind the horizontal ports, and place the Glowing Embers on the front flat burner away from the ports. Put ember material nowhere else and replace it only with Superior's. Volcanic stone and small decorative logs may go around the base, never on the front burner or the logs.
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Running it: never burn wood or any other solid fuel in a fireplace with these logs installed, run them only with the fireplace screen in place and any glass doors fully open, and expect possible pilot outages above 4,500 ft.
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Massachusetts: vent-free appliances can't go in bedrooms or bathrooms, installation and repair must be done by a licensed plumber or gas fitter, the flexible gas connector can't be longer than 36", the shutoff must be a T-handle valve, and a working smoke detector is required where the logs are installed.
Frequently Asked Questions
Why are there two boxes?
The 30" Giant Timbers set is packed in two cartons, LMF30GTA (1 of 2) and LMF30GTB (2 of 2). Order both; together they're one complete set, and neither box is meant to replace single logs.
Which burner does it need?
One Superior MNF24 Mega-Flame burner. Superior pairs 24" and 30" logs with the MNF24 and 36" logs with the MNF30, each in millivolt, variable or electronic control and natural gas or propane.
Which control should I pick?
The millivolt burner runs from its control knob and is remote ready for the RCKIT4001, TRC and TSRC remotes and the GWMT1 and GWMS2 wall controls. The variable burner includes a ProFlame remote with manual and thermostat modes and five flame heights. The electronic burner includes an EcoFlow touch screen remote with manual and thermostat modes and three flame heights.
Will it fit my fireplace?
Superior designs the 30" set for a 42" firebox. It needs at least 39" of width at the front, 26-3/4" at the back (measured 15-1/2" in), 28" of height and 15-1/2" of depth, in a wood-burning masonry fireplace, a UL127 factory-built fireplace that allows unvented gas logs, or a listed vent-free firebox.
How big a room does it need?
Superior uses the National Fuel Gas Code method: the room's volume in cubic feet, counting adjoining rooms open through doorways without doors, times 20 is the most Btu/h the space can support. At 40,000 Btu/h the burner alone needs about 2,000 cubic feet, and any other gas appliance in the space that isn't direct-vent adds to the total. Smaller or very tightly built spaces need extra fresh air brought in.
Can I run it with the damper open?
Yes. The logs are also listed for vented use in a wood-burning fireplace. The GA6080 damper clamp holds the damper permanently open, leaving at least 39 sq in of flue opening on a 6 to 15 ft chimney or 29 sq in on a 15 to 30 ft chimney. Vented operation is required if the fireplace doesn't meet the vent-free clearances or local codes don't allow vent-free logs.
What does the LAMF kit add?
The LAMF is Superior's accessory log kit for the Giant Timbers set. Extra logs go only around the base, never on the front burner or on the logs.
Will it heat during a power outage?
Yes. None of the burners needs house power: the millivolt and variable versions run off a standing pilot, and the electronic version runs on batteries in its power supply and remote. Superior says the logs can be your main heat source during an outage; the rest of the time they're meant as supplemental heat alongside your furnace.
Is a smell normal the first few times?
A slight smell or haze during the first fires comes from manufacturing residue and the logs curing, and it goes away. Odors later on usually come from things in the room air, such as cleaning products, paint or candles, mixing with the combustion air.
What if the logs start to soot?
Soot means a flame is touching a log. Turn the logs off, let them cool and set each piece back exactly where the placement instructions show; with the burner on HI, no flame should touch any log. Don't add rocks or extra logs on the burner. If it still soots, have a qualified service technician check the burner's air openings.
How do I care for it?
Turn it off and let it cool for at least 30 minutes first. Clean the burner, pilot and air inlet holes with a vacuum, a soft brush or compressed air under 30 psi about every three months while you're using it and before each heating season, and have it inspected by a qualified service person every year. Replace any log that's broken or chipped dime-size or larger, and put each one back exactly as the instructions show.
Warranty
Superior's Limited Three Year Warranty on gas log sets covers defects in materials and workmanship this way:
- Logs and grate: 3 years
- Gas components: 1 year, repair or replacement
- Remote control: 1 year, repair or replacement
- Parts not otherwise listed: 90 days
- Labor: paid at IHP rates for the covered part's warranty period
Wear and tear, misuse, faulty installation and damage from burning wood or other solid fuel aren't covered. The warranty is for the original owner of a gas log set installed in the US or Canada. Full terms are in the MNF24 and MNF30 Millivolt and Variable Burner Installation and Operation Manual.
Documents and Downloads
