What's the actual difference?
Before we get into the nitty-gritty of moving from natural gas to lpg, we should probably clear up what each one actually is. Natural gas is mostly methane. It's the stuff that comes through the pipes in the street, usually managed by a big utility company. It's light, it's reliable, and you never really have to think about it until the bill arrives.
LPG, on the other hand, is usually propane or butane (or a mix of the two). It's a byproduct of natural gas processing and oil refining. The "liquefied" part is the key. By putting it under pressure, it turns into a liquid, which makes it incredibly easy to store in tanks or cylinders. This is why you see it used for BBQ grills, caravans, and houses in rural areas where the big pipes don't reach.
The biggest difference—and the one that matters most for your appliances—is the energy density. LPG packs a much bigger punch. It has a higher calorific value, meaning you need less LPG to produce the same amount of heat as natural gas. Because of this, you can't just hook up an LPG bottle to a stove meant for natural gas. You'd end up with a flame that's way too big and potentially dangerous.
The industrial side: How it's made
It's interesting to note that the journey from natural gas to lpg often starts at the same source. When companies drill for natural gas, what comes out of the ground isn't pure methane. It's usually a "wet" gas, meaning it contains a bunch of other stuff like ethane, propane, butane, and even some water vapor.
To get the clean, dry natural gas that goes into city pipes, processors have to strip out those other hydrocarbons. This is where LPG comes from. Through a process of cooling and pressurization, the propane and butane are separated from the methane. So, in a very literal sense, the industry is constantly converting raw natural gas to lpg components before they ever reach your home.
Converting your home appliances
Now, if you're a homeowner looking to make the switch, you're likely talking about "conversion." Maybe you've bought a beautiful vintage stove that was set up for city gas, but you live off-grid. Or maybe you're tired of high fixed utility fees and want to switch to bottled gas.
Can you do it? Usually, yes. Most modern appliances are designed to be "dual fuel," but they aren't "auto-switching." To go from natural gas to lpg, you generally need a conversion kit.
The main thing that changes is the "jet" or "orifice." These are tiny brass screws with a hole in the middle that regulates how much gas gets to the burner. Since LPG is much more energy-dense and delivered at a higher pressure, the hole in an LPG jet is significantly smaller than one for natural gas. If you don't change these out, you'll get a massive, soot-producing yellow flame that'll ruin your pots and pans—and maybe your kitchen.
Why bother switching?
You might be wondering why anyone would choose to go from natural gas to lpg if they already have a pipe coming into their house. It's usually about independence or location.
For folks living in the countryside, there's often no choice. Extending a natural gas main can cost thousands (or tens of thousands) of dollars. LPG cylinders are the logical alternative. But even in suburban areas, some people prefer LPG because they like the idea of only paying for what they use. There's no monthly "supply charge" just for the privilege of having a pipe connected to your house. You buy a tank, you use it, and you refill it when it's empty.
There's also the reliability factor. If a main gas line breaks during roadworks, a whole neighborhood might be without heat. If you have a large LPG tank in the backyard, you're your own utility company. As long as you've got gas in the tank, your water is hot and your stove is cooking.
The technical side of the conversion
If you decide to make the move, don't try to wing it. Gas isn't like painting a wall; if you mess up, the stakes are pretty high. A licensed gas fitter is a must-have here.
When converting from natural gas to lpg, the technician will do a few things: 1. Change the injectors: As mentioned, those tiny brass nozzles need to be swapped out. 2. Adjust the regulator: Natural gas and LPG operate at different pressures. The regulator on your appliance (or the one at the tank) needs to be set correctly so the gas flows at the right rate. 3. Adjust the low-flame setting: This is a step people often forget. When you turn your stove down to "simmer," the amount of gas needs to be calibrated so the flame doesn't just blow out. 4. New labels: It's actually a legal requirement in many places to stick a label on the appliance saying it has been converted to LPG. This prevents the next owner from making a dangerous mistake.
Cost considerations
Is it cheaper to run natural gas to lpg? Honestly, it depends on where you live. In most major cities, natural gas is cheaper per unit of energy because it's moved in bulk through pipes. LPG involves trucks, tanks, and manual labor to deliver, which adds to the cost.
However, if you're a low-volume user, LPG might actually save you money. Those fixed daily supply charges for natural gas can add up to hundreds of dollars a year before you've even turned on a single burner. For a small cabin or a weekend home, bottled gas is almost always the more economical choice.
Safety first
I can't stress this enough: don't DIY gas work. It's tempting to buy a conversion kit online for twenty bucks and try to save on the labor, but it's just not worth it. LPG is heavier than air. If you have a small leak, the gas won't just float away like natural gas (which is lighter than air). Instead, LPG pools on the floor, in cupboards, or in basements. All it takes is one spark, and things go south very quickly.
A professional will do a "leak down test" to make sure every connection is airtight. They have the gauges to ensure the pressure is exactly where it needs to be for your specific stove, heater, or hot water system.
Environmental impact
If you're worried about your carbon footprint, the move from natural gas to lpg is mostly a wash. Both are fossil fuels, though they are considered "cleaner" than coal or oil. They produce less CO2 and far fewer particulates.
LPG is often touted as being slightly greener in terms of "accidental" emissions. Because it's stored in tanks, there's very little leakage. Natural gas infrastructure, particularly old city pipes, is notorious for small methane leaks, and methane is a much more potent greenhouse gas than propane. So, in that specific sense, LPG has a bit of an edge.
Final thoughts
Switching from natural gas to lpg isn't a massive headache as long as you know what you're getting into. It's a common transition for people moving out of the city or those looking to simplify their utility bills. Just remember that the two gases play by different rules. Respect the chemistry, get the right conversion parts, and always, always hire a pro to do the final hookup. Once it's set up correctly, you won't even notice the difference when you're boiling a pot of water—other than maybe feeling a little more self-sufficient.