Today's Video Headlines: 09/19/25
Hey Dr Zac, over winter I was cranking up the heater, but someone at work mentioned these reverse cycle heaters/air conditioners, especially older ones, can spread. We also have a gas heater in the kitchen, and he said that can emit carbon monoxide .
Is that true? With summer coming up – should I stop using our reverse cycle. What should I use instead!? Melbourne can get putrid during the hot months. What’s the safest way to stay warm and cool without risking my health? – Dear Carla, thanks for your question. Melbourne’s four-seasons-in-a-day climate means our heaters and airconditioners work overtime but do they put our health at risk? Let’s clear it up., a severe pneumonia. It thrives in stagnant warm water that gets dispersed as a mist, which is why outbreaks are linked to cooling towers, spas and fountains. Your reverse-cycle split system doesn’t store water, so it isn’t a breeding ground. The main risk at home is dust, mold and allergens in dirty filters, which can flare up asthma or hay fever. Regular cleaning fixes this.A reverse-cycle split system doesn’t store water and thus not a breeding ground for Legionella, the bacteria that cause Legionnaires’ disease., which is a colourless, odorless gas that at high levels can be deadly. Even at lower levels, long-term exposure is harmful. Gas appliances also produce nitrogen dioxide, which research has repeatedly linked to asthma flares in children and lung irritation in adults. Health authorities and peer-reviewed studies both point to this as a measurable risk. The good news: a properly flued and serviced heater, in a ventilated room, is much safer. But if yours is old, unflued, or hasn’t been checked in years, get it inspected. And a carbon monoxide alarm is a smart investment.• Insulate and draught-proof to reduce how hard your systems need to work. Carla, this means you can keep using your reverse-cycle without worrying about legionella. Focus on your gas heater because that’s where the real evidence points to risk.Immune boost for less: Blackmores vitamins are on a rare sitewide saleAmazon tips the scale with 29% off RENPHO’s smart pick before Prime DayLiberal CNN analyst shares 'shocking' text Charlie Kirk sent to him — a day before assassinationJay Leno reacts to Jimmy Kimmel's suspension years after 'JKL!' host 'humiliated' himAshley Olsen shows off new hair color as she ramps up public appearancesA reverse-cycle split system doesn’t store water and thus not a breeding ground for Legionella, the bacteria that cause Legionnaires’ disease.
Air Conditioning Bacteria Carbon Monoxide Legionnaires’ Disease
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