Bosch heat pump tumble dryers come from three of the brand's tiers: Series 4, Series 6 and Series 8. Every one is a freestanding condenser model, so they suit anyone who wants lower running costs without fitting a vent hose through a wall. A heat pump dryer passes warm air through a heat exchanger and reuses it, which lets it dry at lower temperatures than a conventional dryer. That is gentler on fabrics and uses less electricity, but cycles take longer, and the dryer usually costs more to buy.

Capacity and efficiency are the first things to compare. Series 4 dryers take 8 kg and are rated A++. The Series 6 and Series 8 models step up to 9 kg and A+++, which helps larger households dry a full wash in one go. Some Series 6 models and the Series 8 connect to the internet, so you can check on a cycle from your phone. Where noise levels are listed, they run from 59 to 61 dB, with the Series 8 the quietest. You can have white across the range, and some Series 6 models also come in graphite.

All of these appear under Bosch freestanding heat pump tumble dryers. You can also browse every Bosch tumble dryer or the full Bosch range. To narrow it down, start with drum size: 8 kg in Series 4, or 9 kg further up. Then decide whether app connectivity, the lowest listed noise level or a graphite finish is worth paying more for.