Why Is My LPG Consumption Suddenly Higher?

A sudden increase in LPG consumption can quickly turn into a higher operating cost for a restaurant or commercial kitchen. If you're using the same equipment and cooking for roughly the same number of customers, a noticeable increase in cylinder usage deserves investigation.

So, why is my LPG consumption suddenly higher? The cause could be something simple, such as increased cooking hours or a dirty burner, but it can also indicate inefficient appliances, incorrect gas pressure, leaks, or changes in your LPG system.

High LPG consumption can result from increased kitchen demand, longer operating hours, inefficient burners, incorrect gas pressure, poor maintenance, LPG leaks, or changes in cooking practices. The best way to identify the cause is to compare current LPG usage with previous consumption and systematically inspect the appliances and gas installation.

What Is Considered High LPG Consumption?

There isn't one universal LPG consumption level that is considered "high."

Every commercial kitchen has different requirements based on:

• Number of burners

• Type of cooking appliances

• Operating hours

• Daily customer volume

• Cooking methods

• LPG cylinder size

• Kitchen equipment efficiency

• Gas pressure

• Frequency of peak-time cooking

For example, a restaurant operating 12 hours a day with several wok burners will naturally consume more LPG than a small café operating for six hours with only a few appliances.

The important question isn't simply "How much LPG am I using?"

It's:

"Am I using significantly more LPG than expected for the same level of kitchen activity?"

That comparison can help identify a genuine LPG consumption increase.

Why Is My LPG Consumption Suddenly Higher?

There are several possible explanations. Some are related to normal business activity, while others require inspection.

1. Your Restaurant Is Serving More Customers

The most straightforward explanation is increased demand.

If your restaurant has recently become busier, LPG consumption will naturally increase.

For example:

Before: 150 meals/day Now: 220 meals/day

More meals generally mean:

• More burner usage

• Longer cooking times

• More batches of food

• More hot water or steam production

• Greater overall LPG demand

Before looking for an equipment fault, compare your LPG consumption with your actual kitchen workload.

2. Your Kitchen Is Operating for Longer Hours

Even without an increase in customer numbers, longer operating hours can increase LPG usage.

Maybe your restaurant has recently:

• Extended lunch hours

• Added breakfast service

• Started late-night service

• Added catering

• Increased preparation time

• Introduced an additional cooking shift

If the kitchen is using LPG for two or three additional hours each day, your monthly consumption can increase noticeably.

3. LPG Appliances May Be Operating Less Efficiently

A burner that isn't operating correctly may consume more LPG without providing the expected cooking performance.

Common warning signs include:

• Yellow or unstable flames

• Uneven flame distribution

• Soot around cookware

• Longer cooking times

• Weak burner performance

• Excessive heat around the burner

A properly maintained appliance should be checked against its manufacturer's specifications.

If your restaurant is experiencing excessive LPG usage, don't focus only on the amount of gas being delivered. Check how effectively that gas is being converted into useful cooking heat.

4. Dirty or Blocked Burners

Commercial kitchen burners are exposed to:

• Oil

• Grease

• Food particles

• Spills

• Dust

• Carbon deposits

Over time, this buildup can interfere with burner operation.

A dirty burner may produce an abnormal flame and affect cooking performance.

What you can do

Follow the appliance manufacturer's cleaning instructions and keep burner components free from grease and food residue.

Don't drill, enlarge or modify burner openings to "improve" the flame.

If cleaning doesn't resolve the problem, have the appliance inspected.

5. Incorrect Gas Pressure

Gas pressure plays an important role in LPG appliance performance.

If the pressure supplied to appliances isn't appropriate for the equipment, it can affect:

• Flame characteristics

• Burner performance

• Cooking efficiency

• Gas consumption

Possible areas requiring inspection include:

• LPG regulator

• Changeover system

• Manifold

• Gas piping

• Appliance connections

If several appliances suddenly behave differently at the same time, the issue may be associated with the wider gas supply system rather than one individual burner.

6. An LPG Leak Could Be Increasing Your Consumption

An unexplained increase in LPG consumption should never be dismissed if your kitchen's usage hasn't changed.

A leak somewhere in the installation can result in LPG escaping without being used for cooking.

Possible locations include:

• Cylinder connections

• Valves

• Hoses

• Manifold connections

• Regulators

• Pipe joints

• Appliance connections

Important safety point

Don't try to locate a suspected gas leak using a flame.

If you suspect an LPG leak, shut off the gas supply if it is safe to do so, move away from the suspected danger area and seek professional assistance.

For commercial premises in Singapore, EMA requires consumers to engage a Licensed Gas Service Worker (LGSW) or Professional Engineer (PE) to inspect and certify that the gas installation is safe for use. EMA also recommends periodic inspection to identify issues such as leaks, corrosion and damaged pipes. 

7. Your Cooking Habits Have Changed

Sometimes the LPG system isn't the problem at all.

Changes in cooking methods can increase gas consumption.

For example, your chefs may now be:

• Preheating equipment for longer

• Keeping burners on between orders

• Cooking at higher heat

• Using larger cooking vessels

• Boiling larger quantities of water

• Preparing more food in advance

These small changes can add up over an entire month.

Example

If a burner is left running unnecessarily for an extra hour every day, that's approximately:

1 extra hour × 30 days = 30 additional burner-hours per month.

Multiply that across several burners, and the additional LPG consumption can become significant.

8. Your LPG Appliances May Be Old

Older cooking equipment may not perform as efficiently as newer, properly maintained equipment.

This doesn't automatically mean you should replace every appliance.

Instead, assess:

• Burner condition

• Appliance age

• Flame quality

• Heat transfer

• Maintenance history

• LPG input rating

• Cooking performance

If an appliance takes significantly longer to cook food than it previously did, it may be worth having it professionally inspected.

9. More Appliances Are Being Used

Have you recently added:

• Another wok burner?

• A fryer?

• A commercial oven?

• A grill?

• A steamer?

• A second cooking line?

Even one additional high-demand appliance can change your commercial kitchen LPG consumption.

This is why LPG requirements should be reassessed whenever a restaurant expands its kitchen.

A gas installation that was suitable for five appliances may not be appropriate after adding five more.

10. Your LPG Consumption Is Being Compared Incorrectly

One of the easiest mistakes is comparing LPG usage without considering business activity.

For example:

Period	LPG Used	Meals Served
January	20 cylinders	4,000
February	22 cylinders	4,800
March	24 cylinders	5,200

At first glance, LPG consumption appears to be increasing every month.

But the restaurant is also serving more customers.

A better measurement is:

LPG used ÷ meals served

This gives you a more useful indication of LPG consumption relative to kitchen activity.

How to Identify the Cause of Increased LPG Usage

If you're trying to understand how to identify the cause of increased LPG usage, use a step-by-step approach.

Step 1: Check Your LPG Records

Record:

• Cylinder size

• Number of cylinders used

• Delivery dates

• Operating hours

• Customer volume

• Major catering orders

Compare at least several weeks or months where possible.

Step 2: Compare Kitchen Activity

Ask:

• Are we serving more customers?

• Are we operating longer?

• Have we added new menu items?

• Are we doing more catering?

• Are more burners being used?

If business activity increased at the same time as LPG consumption, the additional usage may be expected.

Step 3: Inspect Burner Performance

Look for:

• Yellow flames

• Uneven flames

• Soot

• Burner blockages

• Slow cooking

• Unusual burner sounds

Persistent abnormal flames should be professionally assessed.

Step 4: Check the LPG System

A qualified professional can inspect relevant components such as:

• Regulators

• Manifolds

• Changeover equipment

• Valves

• Hoses

• Gas piping

• Appliance connections

This is especially important when consumption rises without a corresponding increase in kitchen activity.

How to Reduce Excessive LPG Consumption in Singapore

If you've confirmed that your LPG consumption is unusually high, there are several practical ways to improve efficiency.

1. Maintain Burners Regularly

Clean burners according to manufacturer recommendations.

A clean burner can help maintain consistent operation.

2. Avoid Unnecessary Burner Operation

Don't leave burners running when they're not required.

Train kitchen staff to switch appliances off between preparation periods where appropriate.

3. Use the Correct Cooking Flame

Higher flame doesn't necessarily mean faster cooking.

The flame should be appropriate for the appliance and cooking task.

4. Maintain LPG Regulators

Incorrect pressure can affect appliance performance.

Have regulators and related equipment inspected by qualified professionals.

5. Maintain Kitchen Appliances

Regular maintenance can identify worn or damaged components before they affect performance.

6. Monitor LPG Consumption

Create a simple monthly LPG tracking sheet.

Record:

Date → Cylinders used → Operating hours → Meals/orders → Notes

Over time, patterns become much easier to identify.

Does an LPG Leak Always Mean You Will Smell Gas?

Not necessarily.

A gas odour may provide a warning, but you shouldn't rely only on smell to determine whether an installation is leak-free.

This is another reason professional inspection matters.

EMA notes that periodic inspections can help detect leaks, corrosion and damaged pipes before they develop into more serious safety issues. 

For commercial LPG installations, applicable Singapore fire-safety requirements also include provisions for gas-leak detection and automatic shut-off systems in relevant installations. 

When High LPG Consumption Is a Safety Concern

A sudden increase in LPG consumption deserves more attention when it occurs together with other warning signs.

Look out for:

• Persistent yellow flames

• Soot around burners

• Gas odour

• Hissing sounds

• Unstable flames

• Damaged hoses

• Damaged pipework

• Unusual regulator behaviour

• Appliances performing differently

• Consumption increasing despite similar business activity

If you notice these signs, don't simply order more LPG and continue operating.

Have the system inspected.

Singapore's SCDF Fire Code sets requirements for LPG cylinder installations used by commercial and industrial premises, including restaurants and other eating outlets. For example, LPG cylinder installations are subject to requirements covering siting, ventilation, safety provisions and associated equipment. 

How Much LPG Should a Commercial Kitchen Use?

There is no single answer.

Commercial kitchen LPG consumption depends on the equipment and workload.

A useful way to estimate your actual usage is to track:

Daily LPG consumption = LPG used ÷ number of operating days

You can also calculate:

LPG consumption per meal = LPG used ÷ meals prepared

For a restaurant, tracking consumption per meal or per operating hour can be more useful than simply looking at the total number of cylinders used each month.

It helps distinguish genuine high LPG consumption from increased usage caused by business growth.

A Simple Example

Imagine a restaurant normally uses 30 LPG cylinders per month.

The following month, it used 40 cylinders.

The owner initially assumes there is a leak.

After checking the records, they discover:

• Customer volume increased by 20%

• Operating hours increased

• A new wok burner was installed

• Catering orders doubled

The increase may therefore be partly explained by higher kitchen demand.

However, if the restaurant had used 40 cylinders while serving the same number of customers, using the same appliances and operating the same hours, further investigation would be much more important.

Singapore LPG Safety and Professional Inspection

For commercial LPG users, consumption monitoring should go hand in hand with safety management.

EMA states that commercial premises must engage an LGSW or PE to inspect and certify that their gas installation is safe for use. EMA's current gas-safety guidance also notes that periodic inspection helps identify leaks, corrosion and damaged pipes.

SCDF's Fire Code also specifies safety requirements for LPG installations serving commercial premises. Depending on the installation, these can include gas leak detection, emergency shut-off arrangements and automatic LPG shut-off linked to applicable kitchen fire-suppression systems. 

Always have gas-system modifications and safety-critical work handled by appropriately qualified professionals.

Frequently Asked Questions

Why is my LPG consumption suddenly higher?

A sudden increase can be caused by higher customer demand, longer operating hours, additional appliances, changes in cooking habits, inefficient burners, incorrect gas pressure, maintenance problems or an LPG leak.

What causes high LPG consumption in a commercial kitchen?

Common causes include increased cooking demand, inefficient or poorly maintained appliances, burners operating unnecessarily, incorrect gas pressure, additional equipment and possible leaks.

How can I reduce excessive LPG consumption in Singapore?

Maintain burners and appliances, avoid unnecessary burner operation, monitor cooking practices, check gas pressure, track consumption and arrange professional inspection if usage increases without an obvious reason.

Can a dirty burner increase LPG consumption?

A dirty or poorly functioning burner can affect combustion and cooking performance. If cooking takes longer or the flame is abnormal, the appliance should be inspected.

Can an LPG regulator cause high gas consumption?

An incorrect or malfunctioning regulator can affect gas pressure and appliance operation. However, high consumption can have many causes, so the complete LPG system should be assessed before replacing components.

Does increased LPG consumption always mean there is a gas leak?

No. Increased customer demand, longer operating hours and additional equipment can all increase consumption. However, unexplained increases should be investigated because leaks are a potential safety concern.

How can I monitor commercial kitchen LPG consumption?

Track cylinder deliveries or LPG quantities against operating days, kitchen hours, meals served and major catering orders. Comparing LPG consumption with business activity provides a more meaningful picture.

When should I call an LPG professional?

Arrange professional inspection if consumption rises without an obvious operational reason, particularly if you also notice gas odour, unusual flames, soot, damaged components or abnormal appliance performance.

Conclusion

A sudden increase in LPG usage doesn't always mean something is wrong. Your restaurant may simply be busier, operating longer hours or using additional cooking equipment.

However, unexplained high LPG consumption shouldn't be ignored.

Start by comparing LPG usage with customer numbers, operating hours and appliance usage. Then inspect burner performance, maintenance practices and cooking habits. If the increase still cannot be explained, have the LPG installation and appliances professionally checked.

For restaurants and commercial kitchens in Singapore, good LPG management isn't only about controlling costs. It's also about maintaining reliable and safe kitchen operations.

If you're experiencing unusual LPG consumption or want to review your commercial LPG setup, Contact Jia Liang LPG for professional guidance on your LPG requirements.