Heat Pump vs. Vented Dryer: The Real Running-Cost Gap

The median ENERGY STAR certified heat-pump clothes dryer uses 217 kWh a year — about $41 a year at the U.S. average electricity rate. The median standard vented electric dryer uses more than twice that: 608 kWh a year, about $114. Switching dryer technology, not brand, cuts a typical dryer’s running cost by roughly 64% for the same job.

Four numbers from the certified data tell the story:

• 217 kWh/yr vs. 608 kWh/yr — the median heat-pump dryer uses about a third of the energy of the median vented dryer.
• 61 of 318 certified electric dryer models (19%) use heat-pump technology; the rest are standard vented models.
• 40 of 40 ENERGY STAR "Most Efficient" certified clothes dryers are heat-pump models — zero vented dryers qualify.
• 122 kWh/yr — the single cheapest certified electric dryer in the data, the Bosch WQB245AXUC, is a heat-pump model.

What’s actually different between the two dryer types

A vented dryer heats air, tumbles it through wet clothes, and exhausts the hot, moist air outside through a duct — the same basic design dryers have used for decades. A heat-pump dryer, also called a ventless dryer, instead runs air through a sealed refrigerant loop: it extracts moisture and heat from the air and recycles most of that heat back into the drum, so it needs no exterior vent at all. Reusing heat instead of blowing it outside is why heat-pump models use so much less electricity per cycle.

How much less does a heat-pump dryer actually cost to run?

At the U.S. average residential rate of 18.83¢/kWh (EIA, April 2026), the gap between technologies is large and consistent across the certified data:

• Median annual cost — Heat pump: $40.86/yr (217 kWh). Vented: $114.49/yr (608 kWh).
• Category average — Heat pump: $43.87/yr (233 kWh). Vented: $108.65/yr (577 kWh).
• Full range — Heat pump: $22.97–$99.99/yr (122–531 kWh). Vented: $44.44–$129.36/yr (236–687 kWh).

The ranges overlap at the edges — the priciest certified heat-pump models, like the Whirlpool WED7990FW at 531 kWh/yr, cost more to run than the cheapest vented models, like the Midea MLE27N5AWWC at 236 kWh/yr. Technology is the strongest signal, but it isn’t a guarantee — check the specific model’s certified kWh figure before assuming.

Every ENERGY STAR Most Efficient dryer is a heat-pump model

ENERGY STAR’s "Most Efficient" designation is its highest efficiency tier, awarded to a subset of certified models each year. In the clothes-dryer category, every one of the 40 currently-certified Most Efficient models uses heat-pump technology — there isn’t a vented dryer efficient enough to qualify. See the full set of heat-pump clothes dryers if you’re comparing specific models.

Which brands sell heat-pump dryers

Heat-pump technology is still a minority of the certified market — 61 of 318 electric dryer models, or about 19% — concentrated among a specific set of brands:

• Miele — 10 certified models
• LG — 10 certified models
• Whirlpool — 8 certified models
• Samsung — 8 certified models
• Asko — 7 certified models

Smaller counts also appear from Summit, Blomberg, Beko, Bosch, BREDA, Smeg, LG Signature, and Gorenje. See the full certified electric clothes dryer list to compare every model side by side.

Is a heat-pump dryer worth it?

The running-cost case is straightforward: based on the median figures above, a heat-pump dryer saves a typical household somewhere around $65–$75 a year in electricity compared with a standard vented model, and that gap holds at any electricity rate since it’s driven by energy use, not price. Two other factors matter beyond running cost, though neither is part of WattCost’s certified running-cost data: heat-pump dryers typically carry a higher purchase price than a comparable vented model, and needing no exterior vent makes them an option in apartments, condos, and other spaces where venting outside isn’t possible. If you already have a vent installed and buy on price alone, a vented dryer is still the cheaper appliance to acquire — just a more expensive one to run every year after that. For how electricity rates change the numbers further, see why the same dryer costs 4x more depending on your state.

FAQ

Do heat pump dryers really use less electricity than a vented dryer? Yes. The median certified heat-pump dryer uses 217 kWh a year versus 608 kWh a year for the median vented model — about 64% less energy for the same drying job.

Are heat pump and ventless dryers the same thing? Yes. In ENERGY STAR’s electric clothes dryer certifications, "heat pump" and "ventless" describe the same core technology — a sealed refrigerant loop that recycles heat instead of exhausting it outside — so the two terms are used interchangeably by manufacturers.

Do heat pump dryers need an exterior vent? No. That’s the main non-cost advantage — a heat-pump dryer recirculates air internally, so it can be installed anywhere with a power outlet, including apartments and closets with no duct to the outside.

Do heat pump dryers take longer to dry a load? Often, yes — heat-pump models dry at a lower temperature than vented dryers, which can mean a longer cycle for the same load. Cycle time isn’t part of ENERGY STAR’s certified energy-use data, so check a specific model’s spec sheet if cycle length matters to you.

What’s the single cheapest certified electric dryer to run? The Bosch WQB245AXUC, a heat-pump model certified at 122 kWh a year — about $23 a year at the U.S. average electricity rate.

Why aren’t gas dryers included in this comparison? Because a gas dryer’s operating cost is mostly natural gas, not electricity, so comparing its kWh figure to an electric dryer’s would understate its real running cost. WattCost’s certified dryer data covers electric models only.