Heat Pump Dryer vs Vented Dryer: Which to Buy

Both dry clothes. The differences are in how fast, how much electricity, what circuit, and where the machine can physically go — and which of those matters most varies a lot by household.

The core difference

A vented dryer heats air, blows it through the drum, and exhausts the hot, moist air outdoors. Simple, fast, and it throws away all the heat plus a quantity of conditioned house air.

A heat pump dryer circulates air in a closed loop, condensing moisture out over a cold coil and reusing the heat. No exhaust, much less energy, lower temperature, longer cycle. See heat pump dryers explained.

Head to head

What does a dryer vent actually cost you?

Worth making explicit because it's routinely left out of comparisons.

A vented dryer doesn't just exhaust the heat it generated — it exhausts air from inside your house. That air is replaced by outside air leaking in, which your heating or cooling system then has to condition.

So a vented dryer running in January is expelling heated air and pulling in cold air, and you pay for that twice: once in the dryer's own energy, once in the heating system's. The same applies in reverse during air conditioning season.

The heat pump dryer's advantage is therefore larger in practice than the appliance's rated efficiency alone suggests, and larger still in extreme climates.

Does a heat pump dryer need a 240V circuit?

This is often the decisive factor in an electrification project.

A vented electric dryer uses a large resistance heating element and needs a dedicated 240V circuit. If you're converting from a gas dryer, that circuit probably doesn't exist — so the conversion means electrical work, a permit, and possibly panel capacity you don't have.

Many heat pump dryers run on a standard 120V circuit, because the heat pump needs far less power. If a suitable 120V outlet already exists in the laundry area, the conversion can be a straight appliance swap with no electrician at all.

For a household with a full panel, this can flip the decision entirely. Check the specific model rather than assuming — some larger or faster heat pump dryers do use 240V. See dryer electrical requirements and 120V appliances for electrification.

Should I buy a heat pump or vented dryer?

Buy a heat pump dryer if:

• You can't vent — apartment, condo, interior laundry closet
• Your panel is full and the 120V option avoids electrical work
• You do a lot of laundry, so running-cost savings accumulate
• You care about fabric care and shrinkage
• You want placement flexibility
• You're in an extreme climate, where the lost-conditioned-air penalty is largest

Buy a vented electric dryer if:

• Speed matters — large household, back-to-back loads, tight schedules
• You already have a 240V circuit and a working vent
• Purchase price is the binding constraint
• You do relatively little laundry, so running costs are small either way

Practical adjustments

Switching to a heat pump dryer changes the routine slightly:

• Start loads earlier — cycles run longer
• Plumb the condensate to a drain if the model supports it; emptying a reservoir every cycle gets old fast
• Clean the condenser filter on schedule. This is the maintenance item people skip, and skipping it makes cycles longer and clothes come out damp — which then gets blamed on the technology.
• Don't install it in an unheated space in a cold climate; performance drops with ambient temperature

What do you do with the old dryer vent?

If you replace a vented dryer with a ventless one, the duct becomes an unused opening through the building envelope.

Options: cap it, or have it properly sealed and insulated. Leaving it open is a small but genuine air-leakage path, and it's an entry point for pests. Worth ten minutes.

If you're replacing a gas dryer

Two extra steps beyond the appliance:

1. Have the gas line capped by a licensed professional — see capping an unused gas line
2. Check whether this is your last gas appliance. If so, removing the gas meter eliminates the fixed monthly service charge — frequently worth more than the dryer's energy savings. See removing your gas meter.

Full process in replacing a gas dryer with electric.

The bottom line

Vented dryers are faster and cheaper to buy; heat pump dryers use much less energy, need no vent, are gentler on clothes, and often run on 120V — which can mean no electrical work at all when converting from gas. Choose vented if speed matters and the circuit and vent already exist; choose heat pump if you can't vent, your panel is tight, or you do enough laundry for the running-cost difference to matter.

Compare running costs with the electricity cost calculator, check capacity with the home electrical load calculator, or see appliance wattage.