It's said that updating old appliances like fridges, freezers and washing machines to A or A+ rated (i.e. Ultra efficient) versions is a good way to reduce your CO2 emissions and save money.
Well....that's only if you do it when the original appliance actually breaks down. The fact is, even if you're switching a G rating for an A+, it is likely to take several years before it pays you back, if at all (See here for the cost differences between grades).
So it's only worth it from a CO2 perspective, and even that is questionable when you take into account the 'secondary CO2' produced in manufacturing the appliance when you don't actually need it yet.
My advice is only replace it when it's worn out. Or, if you're determined to update, make sure you sell or give the old appliance to someone who'll keep using it until it does give up.
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