Whirlpool. The Duet full-size washer offers 4.4 cubic feet of capacity, is CEE Tier III qualified, and achieves a 2.46-MEF and a 3.8-WF rating, or about 37% and 97% better than current minimum thresholds. With spin speeds of up to 1,300 rpm and smart moisture sensors in the dryer, a wash and dry load can be done in about 30 minutes, says the firm. The Eco Normal cycle on the Resource Saver dryer automatically senses heat and moisture. 800.253.3977.