Money Saving Expert founder Martin Lewis has issued a warning to those planning to switch from ovens to air fryers.
He expressed his doubts about the energy efficiency of these popular kitchen gadgets – especially for cooking large meals like Christmas dinner, WalesOnline reports.
He said on a segment of ITV show This Morning: "I heard you on the show mentioning someone was gonna cook a Christmas dinner in an air fryer. Is that right? If that's being done for energy reasons, I would be somewhat sceptical whether that is a good idea."
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"If it's being done for taste, I don't want to get involved. I mean, the benefit of an oven is when you're cooking a lot for a lot of people, and you can fill all the racks and have it on consistently.
"Air fryers are good for small things that cook quickly. If you're gonna have to use your air fryer 15 different times for different items generally on energy usage, you'd be better off to use an oven. So it's an interesting thought."
Martin continued: "The problem with the equation for heating equipment is an oven is going to be about 2000W. A microwave I believe, from memory, a best guess explanation, a microwave gives you consistent heat whereas an oven is warming up to full temperature and then topping it up so it isn't running at full power the whole time…
"But if you're doing a jacket potato for 10 minutes it's going to be far cheaper [in the microwave] than doing a single jacket potato in an oven and keeping it on for an hour and a half. However if you were doing a full roast dinner and you were cooking many of them, that is where it's probably cheaper than putting five or six jacket potatoes in a microwave because each additional object you put in a microwave, you need to keep it on longer because a microwave just heats the individual object.
"General equation is, find the wattage of an item, then work out how many kilowatts or what fraction of a kilowatt it's using, then multiply that by 34p per hour of use." He said this tip also works for air fryers and halogen cookers."
Put simply, the time it takes you to rustle up different meals impacts how much energy you are using. Shorter blasts tend to be better than leaving appliances on for hours at a time.
Martin added: "If you had a 1000W microwave and you put it on for 10 minutes, one KWH for a sixth of an hour, a sixth of 34p is about 6p, shall we say? So it's 6p turning the microwave on for that amount of time. So yes it's a very useful equation."
Energy expert Llewellyn Kinch from MakeMyHouseGreen.com shared this tip for cooking Xmas dinner in the most power-efficient way: "If you cook a turkey in the oven for several hours, it'll use up lots of electricity. The savvy way is to use a slow cooker, which costs a fraction to run compared to a traditional oven. Crispy skin lovers can always finish the turkey in the oven for a short period of time.
"For side dishes, opt for energy-efficient cooking methods, such as the microwave or convection oven. Roast potatoes come out well in energy-efficient air fryers. A final tip is to always match saucepan sizes to hot plates or burners, and keep lids on pots to reduce cooking time and energy waste."
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