Gas vs Electric: The Hidden Health Costs in Your WA Home

Most Australians grew up thinking gas was the clean option. It burns blue, it doesn't smell, it must be fine. Turns out that's wrong.

Gas Indoors Is a Health Risk

A 2023 study in the Medical Journal of Australia found 12.3% of childhood asthma in Australia is attributable to gas cooking. That's over 100,000 kids whose asthma traces back to their kitchen stove.

The research isn't just Australian. Studies from the US, Europe, and Asia all show the same pattern: burning gas indoors produces pollutants that damage lungs, especially in children.

What Gas Combustion Puts in Your Air

Burning natural gas indoors releases a cocktail of pollutants:

Nitrogen dioxide (NO2) irritates airways, worsens asthma, and regularly exceeds outdoor air quality standards inside homes with gas stoves. Effects are immediate and cumulative.

Carbon monoxide (CO) from incomplete combustion reduces your blood's ability to carry oxygen. Low levels cause headaches and dizziness. High levels can kill.

Formaldehyde — a known carcinogen — is released every time gas burns. It irritates eyes, nose, and throat.

Fine particulate matter (PM2.5) penetrates deep into lungs and crosses into the bloodstream. There's no safe level of exposure.

Methane leaks from gas appliances even when they're off. It contains trace amounts of benzene, another carcinogen.

The Asthma Connection

| Finding | Source | |---------|--------| | 42% increased asthma risk | Meta-analysis of 41 studies | | 12.3% of childhood asthma from gas cooking | Australian study 2023 | | 24% higher asthma risk with gas stoves | US CDC data |

Kids cop it worst. They breathe faster (inhaling more pollutants per kilogram), their lungs are still developing, and they spend more time indoors near the kitchen.

Range hoods don't fix it

Even with the range hood running, NO2 levels exceed outdoor air standards within 10 minutes of cooking. Pollutants spread through the whole house and stay elevated for hours. Many range hoods recirculate rather than vent outside, which achieves almost nothing.

Beyond Asthma

It's not just lungs. Fine particles from gas combustion increase heart attack risk, elevate blood pressure, and cause systemic inflammation. Carbon monoxide impairs cognitive function, affects memory, and is linked to chronic headaches and fatigue.

Long-term, the cancer risk from formaldehyde and benzene exposure compounds over decades. These aren't theoretical — they're the same compounds regulated in outdoor air quality standards, except inside your house they concentrate to much higher levels.

Gas Heating Is Also a Problem

Cooking gets the headlines, but gas heating matters too.

Unflued gas heaters are the worst offenders — all combustion products go straight into your living space. They're banned in bedrooms in some states. If you have one, replace it now.

Flued gas heaters are better but not risk-free. Backdrafting happens, older units leak, and they still produce emissions during startup.

Ducted gas heating is the safest gas option, but still requires regular maintenance to prevent combustion chamber leaks. And it's far less efficient than a heat pump doing the same job.

The Electric Alternatives

Every electric appliance produces zero indoor combustion emissions. That's the baseline.

Induction cooktops are faster than gas, more precise, and safer (no open flame, cool surface). They're also cheaper to run. The adjustment period is about a week.

Heat pump hot water uses 3-5x less energy than gas. No indoor emissions, lower running costs, and modern units are quiet enough for a Perth backyard.

Reverse-cycle air conditioning heats and cools at 3-5x the efficiency of gas heating. It also filters the air as it runs — the opposite of polluting it.

Electric ovens produce no combustion products and offer more even heating than gas.

What to Do About It

Right now (free)

• Run your range hood every time you cook — but only if it vents outside
• Open windows for cross-ventilation while cooking
• Never use your gas stove or oven to heat a room
• Get gas appliances serviced annually

This month ($40-200)

• Install a CO detector ($40-100)
• Try a portable induction hotplate ($100-200) — most people are converted within a week

When appliances die (replace with electric)

• Cooktop dies? Go induction ($800-2,000 installed). Biggest health win per dollar.
• Hot water dies? Heat pump ($2,500-4,500). Slashes running costs too.
• Gas heater dies? Reverse-cycle AC ($2,000-5,000). Heats and cools.

The endgame

Once all gas appliances are gone, disconnect the gas line. You'll save ~$350/year in supply charges alone, plus eliminate any leak risk. Add solar to offset the electricity costs of your new appliances.

The Cost of Switching

| Upgrade | Cost | Annual Savings | Health Benefit | |---------|------|----------------|----------------| | Induction cooktop | $1,000-2,500 | $50-150 | Eliminates cooking emissions | | Heat pump hot water | $2,500-4,500 | $100-200 | Removes major gas use | | Split system AC | $2,000-4,000 | $50-150 | Replaces gas heating | | Gas disconnection | $0-200 | $350/year | Eliminates all risk |

You don't need to do it all at once. Just stop repairing gas appliances when they break — replace them with electric instead.

Renting?

You can still improve things: run the range hood, open windows while cooking, and grab a $100 portable induction hotplate. If you have asthmatic kids, document health concerns and raise it with your landlord — there's growing legal precedent around indoor air quality in rentals.

What the Experts Say

"There is no safe level of exposure to the combustion products from gas appliances." — Dr. Kate Charlesworth, Climate and Health Alliance

"If gas stoves were a new product coming to market today, they would likely face significant regulatory scrutiny." — Professor Lidia Morawska, Queensland University of Technology

"The link between gas cooking and childhood asthma is now as established as the link between secondhand smoke and lung cancer was 30 years ago." — Dr. Thao Le, Asthma Australia

The Short Version

Gas indoors is a health risk. The science is settled. Kids with asthma are the most vulnerable, but everyone breathing combustion products daily is worse off for it.

The good news: every appliance you switch to electric immediately improves your indoor air quality. Start with cooking — it's the most frequent exposure and induction cooktops are genuinely better to use anyway.

Ready to make your home healthier? Use our Electrification Calculator to see what switching to electric would mean for your household - both for your bills and your family's wellbeing.