Vornado EVDC300 Energy Smart vs Vornado EVDC500 Energy Smart

In short: The Vornado EVDC300 Energy Smart costs $30 less; the Vornado EVDC500 Energy Smart genuinely holds a larger room (862 sq ft against 567 sq ft); the Vornado EVDC300 Energy Smart costs about $24 less a year in wicks and watts.

SpecVornado EVDC300 Energy SmartVornado EVDC500 Energy Smart
Approx. price~$90~$120
TypeEvaporativeEvaporative
Mistcoolcool
Rated output2.3 gal/day3.5 gal/day
Output standardMaker's published output rateMaker's published output rate
Honest room size567 sq ft862 sq ft
Claimed coverage560 sq ft850 sq ft
Claim vs physics0.99×0.99×
Tank size1 gal2 gal
Runtime at the claimed room11 hr14 hr
Real runtime at full output10 hr14 hr
Yearly running cost~$25~$49
Replaceable mediaWick, replaced through the seasonWick, replaced through the season
White dust riskNoNo
HumidistatYesYes
Noise on low——
Top fillNoNo
Dishwasher-safe tankNoNo
App controlNoNo
Power11 W13 W

Highlighted cells are the better number in that row, and only where a direction is unambiguous — more output and more supported room, less noise, cost and price. Honest room size and runtime are computed from each maker’s own published figures; here is the calculation.

Pros and cons

Vornado EVDC300 Energy Smart

  • The DC motor is a genuine running-cost difference, not a marketing feature - single-digit watts against 30 for the AC models
  • Digital display and touch controls put it ahead of the EV100/EV200 on usability
  • Its coverage claim is within one percent of the standard load calculation
  • Same five-year guarantee as the rest of the line
  • One gallon feeding 2.3 gallons a day of output is about ten hours - the shortest realistic tank life of any Vornado here
  • Costs $20 more than the EV200 while holding a third less water
  • Wick habit unchanged from the AC models - the motor got cheaper to run, the consumable did not
  • Touch controls are less pleasant to use in the dark than physical buttons

Vornado EVDC500 Energy Smart

  • Most output of any portable Vornado while still drawing barely more power than a nightlight
  • Honest coverage claim in a size bracket where every competitor inflates
  • Dual tanks make the daily refill manageable
  • Five-year guarantee, which counts for more on a motor that runs every hour of the season
  • Two wicks, so the consumable bill matches the EV200's rather than the cheaper EVDC300's
  • Fourteen hours at full output, so the dual tanks buy convenience rather than a second day
  • At $120 it is competing with console evaporatives that hold three times the water
  • No app and no scheduling, which at $120 is a real gap next to the ultrasonics