Flame vs. electromagnetism: Comparing induction and gas cooktops in 2024

Gas cooktops are a type of kitchen appliance that uses natural gas or propane as a fuel to generate heat for cooking. These cooktops are equipped with burners, which release a controlled flame that can be adjusted to various intensity levels, which allows for precise temperature control. These cooktops have been favoured by many chefs and home cooks over the years due to their quick heat response, adjustable cooking flame, and versatility in handling various cooking techniques. Additionally, modern gas cooktops often come with advanced features like electronic ignition, flame failure safety devices, and a range of burner sizes to accommodate different types of cookware. This combination of functionality and control makes gas cooktops a popular choice in both professional and home kitchens.

When considering gas cooktops for your kitchen, it’s important to weigh both their benefits and drawbacks to make an informed decision. Understanding the pros and cons will help you determine if a gas cooktop aligns with your cooking style and household needs.

Pros of gas cooktops

Precise temperature control: Gas cooktops offer immediate and precise control over the flame, allowing for quick adjustments in heat intensity. This is especially beneficial for tasks that require fine temperature tuning, such as simmering delicate sauces or searing meats.

Even heat distribution: The direct flame of gas cooktops ensures even heat distribution across the bottom of the cookware, which can result in more consistent cooking results.

Versatility: Gas cooktops can accommodate various cookware types, including those with uneven bottoms, which might perform poorly on electric or induction surfaces.

Visual cues: The visible flame provides a clear visual indicator of the heat level, making it easier for cooks to gauge and adjust the temperature.

Functionality during power outages: Gas cooktops can still be used during power outages, assuming that they are equipped with a manual ignition. This provides a reliable cooking option when electricity is unavailable.

Cons of gas cooktops

Installation costs: Installing a gas cooktop can be more expensive if there is no existing gas line. The cost of running a new gas line can be substantial.

Heat and safety concerns: Open flames pose a burn risk, and gas leaks are always a potential risk, which requires regular maintenance and safety checks.

Environmental impact: Burning natural gas releases carbon dioxide, contributing to greenhouse gas emissions. This environmental impact is greater than that of electric cooktops, particularly those powered by renewable energy sources.

Cleaning challenges: Gas cooktops can be harder to clean due to the grates and burners, which can accumulate spills and food debris.

Kitchen heat: Gas cooktops generate more ambient heat in the kitchen compared to induction cooktops, which can make the kitchen environment warmer and less comfortable, especially in the summer months.

Induction cooktops are a type of kitchen appliance that uses electromagnetic technology to heat pots and pans directly through magnetic induction. These cooktops feature a smooth glass or ceramic surface with copper induction coils underneath that creates a magnetic field when an iron-based pan is placed on the cooktop. This magnetic field induces electric currents within the cookware, generating heat to cook food. Induction cooktops are known for their rapid and precise temperature control, energy efficiency, and enhanced safety features, as the cooktop itself remains cool to the touch except where it contacts the cookware. This technology also allows for easy cleaning, as spills do not burn onto the cooktop surface. Despite these advantages, induction cooktops require compatible magnetic cookware, which can be a limiting factor for some users.

Cooking with induction cooktops presents a mix of advantages and disadvantages that can influence your kitchen experience. Below you can decide if the energy efficiency and modern features of induction cooking are worth the investment and potential adjustments.

Pros of induction cooktops

Energy efficiency: Induction cooktops are highly energy-efficient as they transfer heat directly to the cookware, resulting in less heat loss and faster cooking times.

Precise temperature control: They offer precise temperature control, allowing for rapid adjustments and consistent cooking temperatures. This is ideal for delicate tasks such as simmering sauces or melting chocolate.

Safety features: Induction cooktops remain cool to the touch except under the cookware, reducing the risk of burns. They also have automatic shut-off features if no pan is detected or if the pan is removed.

Ease of cleaning: Induction cooktops' smooth, flat surface makes them easy to clean. Since the cooktop itself doesn’t get hot, spills are less likely to burn onto the surface.

Modern aesthetics: Induction cooktops offer a sleek, modern appearance that can enhance the look of any kitchen. Their minimalistic design is both stylish and functional.

Cons of induction cooktops

Cookware compatibility: Induction cooktops require magnetic cookware, such as cast iron or stainless steel, with a magnetic base. If your current pots and pans are incompatible, you may need to purchase new ones.

Higher initial cost: Due to the nuanced technology, the upfront cost of induction cooktops is generally higher. Additionally, compatible cookware can add to the overall expense.

Noise: Some induction cooktops can produce a buzzing or humming noise, particularly at higher settings or when using certain types of cookware.

Learning curve: There is a learning curve associated with using induction cooktops, as the rapid heating and cooling can differ from traditional cooking methods, requiring adjustments in cooking techniques.

Electricity dependency: Induction cooktops rely entirely on electricity, making them unusable during power outages. This can be a disadvantage in areas prone to electrical disruptions.

Several factors are involved when comparing the cost of a gas and induction cooktop, including the initial purchase price, installation cost, and running cost.

Purchase price

In general, gas cooktops tend to have a lower initial price, ranging between $500 to $1,500, with variables such as brand and features that adjust the price. In contrast, induction cooktops typically have an initial purchase price of between $1,000 and $3,000 or more, thanks to their advanced technology.

Installation cost

Although gas cooktops have a lower purchase price, installation can be an additional cost. However, this is dependent on the current set in your kitchen and whether you need additional equipment to set up your gas cooktop. On average, gas cooktops with an available gas line have an average installation cost that ranges between $950 and $2,000. In comparison, induction cooktops' installation costs average between $200 and $800, depending on whether you'll need electrical upgrades made to your kitchen.

Running costs

Annual running costs will vary depending on how often you use your cooktop. Fortunately, the equation to determine the annual operating cost for gas and electricity are identical, as you'll see below:

• Electricity: Running Cost = Power Consumption (kW) × Usage Time (hours) × Electricity Rate (per kWh)
• Gas: Running Cost = Energy Consumption (MJ/h) × Usage Time (hours) × Gas Rate (per MJ)

In general, gas cooktops are more cost-effective to operate, with an average rate of 11.5 cents per kWh between residential and commercial places, compared to induction cooktops, which have an average rate of 33.6 cents per kWh for electricity. The average annual cost of running a gas cooktop in New Zealand is about $41.98, as opposed to induction cooktops, which average an annual cost of $122.64.

However, it should be noted that there are variances in the electricity and gas rates across the country. There are also different pricing packages offered by utility providers with variable pricing depending on the amount of power consumed, the time when power is consumed etc that can alter these numbers so you do need to consider your own specific situation for a precise comparison. 

Related article: The cost of running an oven in New Zealand: A buyer’s guide for 2024

A kitchen best suited for a gas cooktop typically features several key elements that ensure both safety and functionality. Adequate ventilation is essential, as gas cooktops produce byproducts that need to be effectively vented outside. This can be achieved with a high-quality range hood or exhaust fan​. Access to a natural gas supply is also crucial, whether it's an existing gas line or the capacity to install one​​.

The kitchen should have spacious benchtops and a well-thought-out layout to allow for safe and convenient use of the cooktop, along with heat-resistant materials like granite or quartz for surrounding surfaces to handle high temperatures. Such kitchens are ideal for frequent, high-heat cooking techniques such as stir-frying and searing, where the instant heat and precise control of a gas cooktop shine. Lastly, integrating necessary safety features and ensuring compliance with local building codes enhances the suitability of the kitchen for a gas cooktop.

In summary, types of kitchen best suited for gas cooktops include:

• Kitchens with pre-plumbed gas supplies.
• Kitchens with good ventilation.
• Kitchens with spacious benchtops made from heat-resistant materials.
• Kitchens with chefs that regularly stir-fry or sear meat.
• Kitchens with chefs that prefer the speed, precision and high-heat of gas.
• Kitchens where cost-effective appliances with low running costs are a priority.

A kitchen best suited for an induction cooktop typically includes a modern and efficient design, emphasising both functionality and safety. Induction cooktops require a reliable electrical setup, often needing a dedicated circuit due to their power demands. The kitchen should have ample counter space to accommodate the smooth, flat surface of the induction cooktop, which integrates seamlessly into contemporary kitchen designs. Heat-resistant materials like quartz or granite for surrounding countertops are ideal, as they complement the sleek look of induction cooktops while handling residual heat effectively. 

The induction technology's efficiency and precision make it perfect for kitchens where quick temperature adjustments and energy efficiency are priorities. Additionally, safety features such as child locks and auto-shutoff functions are beneficial, making induction cooktops ideal for family kitchens. Lastly, having cookware compatible with induction cooking, such as pots and pans with magnetic bottoms, is essential to utilise the benefits of an induction cooktop fully.

In summary, the types of kitchens best suited to induction cooktops include:

• Kitchens that enjoy sleek aesthetics.
• Kitchens that have compatible cookware.
• Kitchens with young families where safety is a concern.
• Kitchens where fast-paced cooking is priority.
• Kitchens where advanced technology will be valued.
• Kitchens where sustainability is important.

Choosing a gas cooktop involves several important considerations to ensure it meets your cooking needs and fits well in your kitchen: 

1. Assess cooking needs: Determine the size and number of burners based on cooking habits and kitchen space.
2. Look for sealed burners: Choose models with sealed burners for easier cleaning and enhanced safety.
3. Check safety features: Ensure the cooktop has automatic re-ignition for added safety.
4. Consider cooktop material: Stainless steel for durability and easy cleaning or glass or ceramic for a sleek, modern look.
5. Evaluate control placement and type: Ensure knobs are intuitive and easily accessible.
6. Review BTU ratings: Higher BTUs provide more powerful heat for faster cooking.
7. Check additional features: Simmer burners, griddles, wok burners, etc.

By following this checklist, you can ensure that the gas cooktop you choose will meet your cooking needs and fit well in your kitchen.

Choosing an induction cooktop requires careful consideration of various factors to ensure it aligns with your cooking preferences and kitchen setup:

1. Evaluate cooking needs: Determine the size and number of cooking zones based on typical meal preparation.
2. Look for energy efficiency and rapid heating: Choose models with variable power settings for precise temperature control.
3. Check cookware compatibility: Ensure the cooktop works with magnetic-bottomed pots and pans.
4. Consider control layout and design: Touch controls for a sleek and easy-to-clean option.
5. Review safety features: Automatic shut-off, child locks, residual heat indicators
6. Assess surface material and edge design: Ensure durability and ease of maintenance, as well as verify that they fit seamlessly into your kitchen's aesthetic.

Using our checklist as your guide will help you ensure that you pick an induction cooktop that best suits your kitchen's needs.

1. Is gas or induction cooking healthier?

Several factors come into play to answer which is healthier. From an air quality perspective, induction is healthier for indoor cooking since gas cooktops can produce unhealthy byproducts. In terms of which produces healthier meals, both are healthy options.

2. What happens if you use the wrong pan on an induction cooktop?

In short, nothing will happen. An electric current requires a magnetic connection to generate heat. To check your pan's compatibility, simply use a magnet; if it sticks to the pan, it is suitable for induction cooktops.

3. Can I leave an induction cooktop on overnight?

Yes, a safety feature of this cooktop is that it automatically turns off after cooking, so you don't have to worry about it. While it's not recommended to leave it on intentionally, this feature can be particularly useful in households where you need to care for others.

4. What heats up faster, induction or gas cooktops?

Induction cooktops typically heat up faster. An energy consumer report states that induction cooktops can boil water twenty to forty per cent faster than tested gas and traditional electric cooktops.

5. What is better for gas cooktop ventilation, downdraft or updraft?

Updraft ventilation is generally more effective for home cooks who use high-heat cooking methods, as it efficiently removes smoke and odours by working with the natural rise of hot air. Downdraft ventilation, on the other hand, is less obtrusive and ideal for kitchens with space or design constraints, though it may be less effective at capturing and removing smoke and grease.

Choosing between a gas and induction cooktop ultimately depends on your specific kitchen needs and personal cooking preferences. Gas cooktops are celebrated for their precise temperature control, quick heat response, and versatility, making them a favourite among many chefs and home cooks. On the other hand, induction cooktops offer rapid heating, energy efficiency, enhanced safety features, and ease of cleaning, appealing to those looking for modern kitchen solutions. 

By weighing the pros and cons of each option and considering factors like installation costs, energy efficiency, and cooking habits, you can make an informed decision that best suits your culinary style and kitchen setup. Whether you opt for the traditional allure of gas or the innovative precision of induction, both cooktops provide excellent cooking experiences tailored to different needs and preferences.

Related article: Modern kitchen cooktop ideas for stylish homes in New Zealand