Tumble Dryer Running Costs: Heat Pump vs Condenser vs Vented Per Cycle

Quick answer: Per full load, a heat pump tumble dryer costs about 39p (1.5kWh), a vented dryer about 79p (3kWh) and a condenser about 92p (3.5kWh) at the current cap. Across 150 loads a year that’s roughly £59 versus £118 versus £138 — the heat pump model could save around £79 a year over a condenser.

All costs on this page are calculated at the October–December 2026 Ofgem price cap for Direct Debit customers: 26.32p per kWh of electricity, with gas comparisons at 7.97p per kWh. Unit rates vary slightly across the 14 GB regions, so treat these as good averages and check the rate on your own bill.

The sum, and the assumptions

Cost per load = energy used × 26.32p per kilowatt-hour. The energy figures below are typical for a full 8kg cotton load on a standard programme: heat pump ~1.5kWh, vented ~3.0kWh, condenser ~3.5kWh. So the heat pump load is 1.5 × 26.32p ≈ 39p. Your machine’s energy label quotes its own per-cycle figure — swap it into the same sum for a personalised number.

Per-cycle and annual costs by dryer type

Heat pump dryers run cooler and take longer per cycle — the saving comes from reusing heat rather than generating it fresh, the same principle (and the same coefficient of performance idea) that makes heat pump heating efficient.

Is a heat pump dryer worth the higher purchase price?

Heat pump models typically cost more to buy than equivalent vented or condenser machines. Whether that premium pays back depends on your drying habits: at 150 loads a year, saving roughly £59–£79 annually against a vented or condenser model, a typical price gap could be recovered within a few years of ownership — sooner for big families drying most days, much later for occasional users. Check the price difference on the models you’re actually comparing and divide by your realistic annual saving; it’s a ten-second sum that answers the question for your household.

Cutting drying costs whatever you own

• Spin faster in the washing machine first — a 1,400rpm spin removes far more water than 1,000rpm, and mechanical spinning is much cheaper than evaporating water with heat. See our washing machine ratings guide.
• Use sensor-drying programmes rather than timed ones, so the dryer stops when clothes are dry instead of when the clock says so.
• Clean the lint filter every load and the condenser/heat-exchanger regularly — clogged airflow stretches every cycle.
• Don’t overdry: “cupboard dry” beats “extra dry” for both fabric life and cost.
• And when the weather cooperates, the washing line remains unbeatable at £0 — our dryer vs washing line comparison runs those numbers.

Reading the energy label like it matters

Dryer energy labels quote consumption per cycle for a full load on the standard cotton programme, plus a weighted annual figure based on 160 cycles — both directly comparable between machines and both more useful than the efficiency letter alone. Two things to watch: real mixed loads at partial capacity use less than the label cycle but more per kilogram, and the label assumes the machine is working in reasonable conditions. That last point bites heat pump owners: their refrigeration circuit slows down in a cold utility room or garage, stretching cycles and nudging up consumption, so a heat pump dryer earns its keep best somewhere the temperature stays comfortably above 10–15°C.

Placement and plumbing practicalities

Vented dryers need a hose to an outside wall or window — cheap machines, but the placement constraint is real, and venting warm damp air outdoors is exactly why they waste energy. Condensers and heat pump models can live anywhere with a power socket, collecting water in a tank (or a direct drain if plumbed). Condensers dump their waste heat into the room, which is cosy in January and unwelcome in July; heat pump machines release very little heat at all. None of this changes the running-cost ranking, but it often decides which machine a given home can actually use.

Whichever machine you own, the sequencing rule is the same: get water out mechanically before you pay to evaporate it. A fast spin, a shake-out, and a full-but-not-crammed drum let the dryer’s sensors finish early — while an overstuffed drum blocks airflow and can add half as much again to the cycle. Combined with the line on dry days, most households can cut drying costs well below the table figures without touching the machine’s settings.

FAQs

How much does a tumble dryer cost per hour?

It’s better measured per load, since cycle lengths differ: roughly 39p per heat pump load (despite a longer cycle), 79p vented and 92p condenser at current prices. A condenser drawing ~2.5kW mid-cycle costs about 66p per running hour.

Why does a heat pump dryer use so much less electricity?

Instead of heating fresh air and throwing it away, it dehumidifies and reheats the same air in a loop, recovering heat with a small refrigeration circuit. Less new heat generated means less electricity — about half to a third of a conventional dryer’s per-load use.

Is a vented dryer cheaper to run than a condenser?

Slightly, on typical figures — around 79p versus 92p per full load — because condensing the moisture costs a little extra energy. Both are comfortably beaten by heat pump models, and all three by a washing line or a well-managed airer with a dehumidifier, covered in our dehumidifier cost guide.