Most Energy Efficient Washer and Dryer | What To Buy Now

If you want the truly lowest energy use from a washer and dryer, the machine type matters more than any brand. Front-load washers with high IMEF ratings and heat-pump dryers with high CEF ratings beat everything else on the market. For a conventional side-by-side set, the LG WM4000H washer and DLEX4000 dryer deliver the best real-world balance of efficiency, capacity, and price.

What Makes A Washer And Dryer Energy Efficient

Three metrics tell you everything: IMEF measures washer efficiency, IWF measures water use, and CEF measures dryer efficiency. You compare machines side-by-side using the ENERGY STAR product finder for certified laundry sets. Higher IMEF and CEF numbers mean lower energy use.

ENERGY STAR certified washers purchased after March 2015 use about 25 percent less energy and 40 percent less water than standard models. Certified dryers save energy too, but the gap is smaller because every dryer still needs heat.

Best Conventional Washer And Dryer Set

The LG WM4000H front-load washer paired with the LG DLEX4000 electric dryer is the efficiency pick for a traditional setup. The washer carries an IMEF of 2.8 and an IWF of 3.2, using roughly 105 kWh per year. The matching dryer adds about 538 kWh annually.

That means the pair runs on about 643 kWh a year combined. For comparison, an older standard washer alone can pull 400 kWh annually, and a dated electric dryer often tops 800 kWh. The LG set cuts that draw roughly in half.

Two design choices drive the savings: the front-load drum tumbles clothes through water rather than soaking them, and the high-spin speed extracts more moisture before the dryer ever starts.

All-In-One Combos And Tower Options

Ventless heat-pump combos dry clothes at lower temperatures while recirculating the air, so they use far less energy than electric vented dryers. The Samsung WD53DBA9 washer-dryer combo posts an IMEF of 2.92 and an expected annual energy use of just 103 kWh for washing.

The LG WKHC252H*A laundry tower takes the efficiency crown on the drying side, with a CEF of 9.0 and just 266 kWh of expected annual electricity use across a 7.8-cubic-foot drum. That is roughly half the energy of a standard electric dryer.

Combo units have tradeoffs. Drying takes longer than a dedicated vented dryer, and you cannot run a wash and a dry at the same time. Towers pair a washer below and dryer above, so they do not have that limitation, but they need the physical height.

Installation And Setup Considerations

Heat-pump dryers and ventless combos plug into a standard outlet and need no exterior venting. That makes them ideal for apartments, condos, and tight spaces. But the drying cycles run longer, and some LG models require a dedicated 20-amp circuit and a 2.4 GHz Wi-Fi connection for smart features.

For anyone comparing options, the practical route is to confirm exact model numbers on the ENERGY STAR certified laundry sets list before you buy, since efficiency ratings vary between variants of the same series. And if you are weighing cost against savings, read our tested roundup of the most economical washer and dryer models for budget-focused picks.

Frequently Asked Questions

Are front-load washers always more efficient than top-loaders?

Yes. Front-load machines use less water and less energy because the drum tumbles clothes through a smaller water bath. Top-loaders with impellers have narrowed the gap, but front-loaders still lead on IMEF ratings across ENERGY STAR certified models.

Is a heat-pump dryer worth the higher upfront cost?

Usually yes for heavy users. Heat-pump dryers use roughly half the electricity of conventional vented electric dryers, so the savings compound over years of regular use. They run cooler and slower, so faster drying matters more than cost for some households.

How much can I save switching to an efficient set?

ENERGY STAR certified washers use about 25 percent less energy and 40 percent less water than standard machines. Paired with a high-efficiency dryer, a typical household can expect to cut annual laundry energy costs by a third or more depending on loads per week.