An exhaust fan will also do the trick. So if you already have a fan in your laundry you don’t need to vent the dryer.
Or, as OK Louise said, get a condenser dryer. Or better still, get a heat pump dryer. They’re much more economical to run. $0.09 per kilo (for a 9* one) as opposed to $0.34 per kilo for a vented dryer (1.5*). And they don’t need venting either.
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