I've just looked at the instruction model for the dryer I have. Hotpoint (must have been the last one that was a Hoover that they replaced First Edition FETV 60). The manual says a full dry time is 107mins. As anyone who has one of these dryers knows if you left it on this long the clothes would be on fire or 1/4 of the size. Makes me wonder if the manufactures are playing silly beggars to encourage people to go for Heat Pump as 107mins is almost double the amount of time a full load actually takes.
Thank you for the the input it is appreciated. For reference My Hoover dryer is a 6kg model, and often gets overfilled as the washing machine is a 8kg model. It manages to dry whatever I put in, and dries in 60mins. This isn't a fluke either, as the original dryer I had (which was recalled due to fire safety) had same performance even after 8 years. If I do a half load (half of my washing machine so 4kg)the dryer goes on for 40mins. I am assuming the max my dryer can use in kwh based on it being a 60min dry is 2.2KWH. This still leads to feel we are being mislead by manufactures slightly that we wont save very much having a heat pump dryer. I thought the Miele used equiv. of 1.9kWh total for it's 2 hour spin using up to 1,100w, this compares to my total of 2.2kWh (which as you point out maybe a little lower) for it's full spin of 1 hour at 2,200w
Not really though. LED bulbs come on immediately, and light the room just as well (or better) than old school light bulbs, saving you 80% energy. By contrast, Heat pump tumble dryers are far, FAR slower than regular machines, often taking 4 hours rather than 1 hour to dry a load. So other than saving energy they work worse than the old tech. And the savings in terms of energy are far less than LED vs Incandescent - between 25 and 50% rather than 80%. I myself just bought http://www.currys.co.uk/gbuk/household-appliances/laundry/tumble-dryers/aeg-prosense-t6dbg822n-condenser-tumble-dryer-white-10158126-pdt.html for £379 + 2% quidco . I realise it's an inferior brand and so not a fair comparison, but even if the heat pump miele saves me 50% energy it'll take years to pay the difference. I'd rather buy the AEG, save the money now, and buy the future tech in say 2027 when it's had a chance to mature.
Thanks, I’ve gone for one. My old vented Bosch died some time ago, and I’ve been struggling on without a dryer, waiting for an offer like this. I’d just like to make a slight correction, energy consumption figures are given in kilowatt hours (kWh). Watts is a measure of instantaneous energy, also called power. To get energy you have to multiply this by time. I’m mentioning this just in case the figure you’ve given for your Hoover dryer is in fact in Watts and is therefore the maximum power it can draw from the wall socket and not the energy consumption per load. To compare figures for the energy consumption per load, you also have to compare each dryer’s full load. If you look at the Miele T 8722, which appears to be Miele’s only current domestic vented model, that has an energy consumption per load of 4.01kWh. That’s over 80% more than the figure you’ve given for your basic Hoover dryer. However, the full load for the Miele T 8722 is 7kg. If the full load of your Hoover dryer is only 4kg, around 80% less, that would give them approximately equal efficiencies. The full load for the Miele TKB 640 WP Eco is 8kg. So, that’s potentially twice the load for that 12% less energy. Of course, these figures don’t give you values for partial loads. A half-load should use roughly half the energy, but it won’t be exactly half the energy and could be a quite a bit more. For very light loads, the efficiency will be much worse. Imagine drying a single pair of socks in any sort of electric dryer. Ok, Japan briefly flirted with microwave clothes dryers, and they can efficiently dry a single pair of particularly small socks. You can think of heat pump (in German Wärmepumpe, hence the WP in the product name) technology as being to the old vented dryer as LED light bulbs are to their old incandescent counterparts.