Short answer: Propane packs more energy per unit, lights hot and portable from refillable bottles, and needs no plumbing, but you manage tanks, and because propane is heavier than air it pools low, so ventilation and leak discipline matter. Natural gas is the convenience play: it’s piped to your studio so you never refill a tank, but it has lower energy density (so a torch often needs more line volume/pressure, or jets sized for NG to hit the same heat), and it requires a permanent gas line. Most home and hobby setups run propane; many studios that already have a gas line prefer natural gas for the never-refill convenience. The good news: most modern torches, including the GTT models in our catalog, are spec’d to run on propane or natural gas, so the torch rarely forces your hand. Pick the fuel that fits your space.
If you’re building out a studio from scratch, this is one piece of a bigger picture, start with the complete glass torch buyer’s guide.
Energy density and flame temperature
This is where the two fuels genuinely differ. Propane carries more energy per unit of volume than natural gas. In practical terms that means, at a given flow, propane delivers more heat, which is why portable, bottle-fed setups can run hot from a relatively small supply.
Natural gas (mostly methane) has lower energy density, so to get equivalent heat at the torch you generally need more gas volume moving through the line, often at the right line pressure, and ideally a torch whose jets are sized or configured for NG. Run a natural-gas-hungry torch off an undersized line and you’ll feel it as a weak, lazy flame. This is the single most important practical takeaway: with natural gas, the supply line and torch configuration have to match the torch’s appetite.
Pressure is where that bites. Unboosted household natural gas arrives at a fraction of a psi (about 7 inches of water column), and only some torches are rated that low. GTT says the GTT Cricket runs on fuel as low as 1/4 psi (GTT Cricket), while GTT’s own Lynx instruction sheet calls for 5 to 8 psi of fuel on the GTT Lynx. Carlisle splits the same way inside one family: its manual specs the Carlisle Mini CC at about 0.25 to 3 psi on natural gas, so house pressure can be enough, but the full-size Carlisle CC at 5 psi gas, which means a booster on a house line (Mini CC, CC). Check the rated fuel pressure of the exact torch before you plan around a house line; the natural gas conversion guide covers boosters.
A note on “flame temperature”: both fuels, burned with oxygen, reach the very high temperatures lampworking needs, your oxygen supply matters more to peak heat than the fuel choice. The fuel difference shows up mostly in how easily you deliver enough energy to the flame, not in some dramatic ceiling on temperature. Source: The Crucible.
What about hydrogen?
Propane and natural gas are the two fuels most studios actually choose between, but there’s a third option worth knowing about: hydrogen. Burned with oxygen, hydrogen produces an oxyhydrogen flame that burns cleanly, because its only combustion product is water vapor. We are not publishing a head-to-head flame temperature here: published figures disagree, and many of the numbers in circulation compare a fuel burned in air against one burned in oxygen, which is not a like-for-like comparison. Actual flame temperature depends on fuel, oxidizer, mixture ratio, inlet conditions, and heat loss, so treat any single quoted number with suspicion.
That clean flame is mainly used for quartz (fused silica), where scientific-glass practice treats hydrogen with oxygen as the standard fuel; it is not the only way to work quartz, and the hydrogen vs propane guide sets out the evidence. For everyday soft-glass beadwork it’s overkill, and it isn’t the fuel most benches reach for.
Hydrogen also asks more of you on availability and handling. It comes from specialty gas supply rather than the bottled propane most studios already keep, and it behaves differently: it’s lighter than air (it rises and disperses, the opposite of propane), has a very wide flammability range, and its flame can be nearly invisible in daylight. If you go this route, use hydrogen-appropriate regulators and fittings, the flashback protection your torch and gas supply call for, and good ventilation, and follow the maker’s guidance.
For most artists, propane remains the default, portable, hot, and simple, and natural gas is the convenience pick for plumbed studios. Hydrogen is a deliberate, specialty choice for high-temp glass, not a general-purpose fuel. For how the glass itself drives this decision, see soft glass vs boro vs quartz, and for color, striking glass on propane vs natural gas.
Supply and the cost model
The two fuels also have very different economics and logistics:
- Propane is bought as a physical product, you fill or swap bottles (a 20 lb BBQ-style tank is common for small studios; larger artists use bigger cylinders). Cost is per refill, and you handle transport, storage, and swapping out empties. There’s no monthly utility line item for the fuel itself.
- Natural gas is a utility. It arrives through the meter and shows up on your monthly gas bill alongside heating and hot water. There’s nothing to haul or refill, but you’re paying for a pipe-fed supply and, usually, for the plumbing to bring it to your bench.
Which is “cheaper” depends entirely on your usage, local utility rates, and how much you’d spend getting a gas line to your work area. A heavy daily user with an existing gas line may find natural gas cheaper and far more convenient; an occasional hobbyist almost always finds propane simpler and lower-commitment.
Plumbing, regulators, and setup
This is where natural gas asks more of you upfront:
- Propane needs the right propane regulator and hose, the tank, and a leak-checked connection , and you’re done. Setup is essentially plug-and-play, which is a big reason beginners and renters choose it. Nothing is permanent.
- Natural gas typically requires a gas line run to your bench and the correct NG regulator/fittings, often work for a qualified plumber or gas fitter, and frequently subject to local codes and permits. Whether the bench also needs its own regulator on a house line depends on the torch’s rated pressure and local code, which the natural gas regulator guide works through. Critically, propane and natural gas fittings and orifices are not interchangeable: never swap a propane regulator onto natural gas (or vice versa) without confirming the torch and regulator are correct for that fuel. If you switch fuels, the torch may need NG-appropriate jets or settings from the maker.
The bottom line on setup: propane is the low-commitment, movable option; natural gas is a fixed-infrastructure investment that pays back in convenience if you stay put.
Portability
Propane wins on portability, decisively. Because it’s bottle-fed, a propane setup can move with you, to a different room, a demo, a class, a new studio, or a rented space you can’t modify. Natural gas is fixed: it’s only available where the line runs, so your bench is anchored to the plumbing. If you teach, travel, demo, or rent, propane’s mobility is often the deciding factor all by itself.
Safety, accurate, not alarmist
You’re combining a fuel gas with pure oxygen and intense heat, so safety is non-negotiable with either fuel. The single most important difference between them is what a leak does:
- Propane is heavier than air, so it sinks and pools low, on the floor, in pits, in basements, in low corners. A propane leak collects where you might not notice it and where an ignition source near the floor becomes dangerous.
- Natural gas is lighter than air, so it rises and disperses upward and out of an upper vent more readily. That generally makes it easier to ventilate, though a leak can still accumulate near a ceiling or in an enclosed high space.
Practical safety holds for both fuels:
- Detect leaks. Leak-check every connection (soapy water on joints), and consider an appropriate gas detector, placed low for propane, high for natural gas, matching where each fuel collects (CO detectors and air monitoring covers detector choice).
- Ventilate. Good airflow protects against both fuel buildup and combustion byproducts. Don’t work a torch in a sealed, unventilated space.
- Use the correct regulators and fittings for the specific fuel, and fit the flashback protection your torch and gas supply call for.
- Secure tanks. Keep propane cylinders upright and secured so they can’t tip, store spares appropriately (often outdoors per local rules), and keep them away from heat.
- Keep oxygen separate from oil/grease. This applies to any setup, regardless of fuel.
None of this should scare you off, thousands of artists run both fuels safely every day. It just means the supporting gear and habits are part of the setup, not optional extras. This article informs your decision; it doesn’t replace the manufacturer’s instructions, local code, or advice from a qualified professional for your specific space.
Side-by-side: propane vs natural gas
| Factor | Propane | Natural gas |
|---|---|---|
| Heat / energy | Higher energy density; hot from a small supply | Lower energy density; needs more line volume/pressure or NG-sized jets |
| Supply | Refillable bottles you fill/swap | Piped utility, never refill |
| Upfront cost | Low, regulator, hose, tank, done | Higher, gas line + correct fittings, often a pro install |
| Ongoing cost | Per refill; no utility line item | On the monthly gas bill; depends on local rates |
| Portability | Excellent, moves with you | Fixed to the plumbing |
| Safety profile | Heavier than air, pools low; secure/store tanks | Lighter than air, rises; easier to vent upward |
| Best-fit studio | Home, hobby, renters, teachers, anyone mobile | Established studio with a gas line and heavy daily use |
Source: The Crucible.
Most torches don’t force the choice
Here’s the reassuring part: the fuel decision is usually about your space, not your torch. Every GTT model in our catalog, the Bobcat included, is listed for propane or natural gas, and so is nearly every other bench burner we carry. The torch may need fuel-appropriate jets, pressure or regulator settings depending on which you choose (the pressure section above is the one to check), so confirm the configuration with the maker, but you’re rarely locked out of a torch by your fuel. That frees you to choose fuel based on convenience, cost, and safety for your particular studio.
How fuel fits with your oxygen choice
Fuel is only one half of the flame, the other half is oxygen, and for peak heat it’s arguably the more decisive half. Whichever fuel you pick, you’ll pair it with either an oxygen concentrator or compressed oxygen tanks, and that choice has its own trade-offs around output, refills, and cost. If you’re working through the whole supply side of your setup, read oxygen concentrator vs tanks for lampworking alongside this fuel decision.
Key takeaways
- Propane: higher energy density, hot and portable from refillable bottles, no plumbing, but you manage tanks and it pools low (ventilate, leak-check low, secure cylinders). The default for home, hobby, renters, and anyone mobile.
- Natural gas: convenient piped supply you never refill, but lower energy density (needs more line volume/pressure or NG-sized jets) and a permanent gas line. It rises, so it’s easier to vent upward. Best for established studios with a gas line and heavy use.
- Safety is non-negotiable for both: correct regulators, the flashback protection your torch and gas supply call for, ventilation, leak detection placed where each fuel collects, and secured tanks.
- The torch rarely decides for you, most torches (including the catalog’s GTT models) run on propane or natural gas, so choose the fuel that fits your space, budget, and safety.
Sources
- The Crucible, “Lampworking/Flameworking tools & supplies”: https://www.thecrucible.org/guides/lampworking-flameworking/tools-supplies/
- Glass Torch Technologies, “Cricket”: https://www.glasstorchtech.com/cricket
- Glass Torch Technologies, Lynx instruction sheet (PDF)
- Carlisle Machine Works, Mini CC bench burner: http://carlislemachine.com/as_benchburners/minicc.php
- Carlisle Machine Works, CC bench burner: http://carlislemachine.com/as_benchburners/cc.php
- Glass Torch Technologies, “Flashback Arrestors”: https://www.glasstorchtech.com/flashback-arrestors
Editor’s note: fuel behaviors and safety guidance reflect general lampworking practice and public sources as of 2026. Always follow local codes, manufacturer instructions, and qualified professional advice for your specific studio.