Vornado Evap40 Evaporative Humidifier 4 gal

Vornado Evap40 Evaporative Humidifier 4 gal

By Vornado · Humidifiers · Home & Workspace

  • Coverage up to 1,000 sq
  • 4 gallon capacity from two 2-gallon water tanks
  • Up to 4 gallon output in 24 hours
  • 3 speed settings with built-in humidistat

Lowest price seen
$139.99
from $139.99 at Sylvane · Checked Oct 5, 2026

Prices are snapshots. Check the current price with the store.

Problems, parts and running costs

Summary

A 4-gallon, three-speed evaporative (wick) humidifier for large dry rooms, built for a buyer who will refill two tanks and swap wicks every few weeks. Check one thing before you buy: there is no automatic shut-off and no empty-tank indicator, so the unit keeps running until you stop it.

Strengths

  • Raises humidity in big rooms: one field review took a 700–800 sq. ft. living room from the low 20s to 40–45% in a few hours.
  • Evaporative operation leaves no white dust on furniture, and there is no mineral overspray to manage.
  • Two removable tanks mean fewer refills, and one usually empties before the other, so refills are predictable.
  • Cheap to run: 45.1 W on High, about 1.08 kWh a day.
  • Five-year warranty, and Vornado replaces a defective unit free for the original owner.
  • Wicks are a stocked part number, $14.99 for a two-pack, so keeping it running never needs a service call.

Weaknesses

  • No empty-tank shut-off and no empty-tank indicator. It runs with empty tanks, so you watch the water level yourself.
  • The fan is audible like a room fan on Medium and loud on High; owners run High in the evening and drop to Low overnight.
  • The humidistat has no percentage scale. One reviewer bought a separate hygrometer and dialed the knob in over several days to find where it cycles, near 40–45%.
  • The tanks gurgle as they release water into the base. Owners of this model describe a constant “glug glug”.
  • Wicks are the running cost: 4–8 weeks per the guide, 1–3 months on hard water by one reviewer’s estimate, and about a week before one owner saw clogging.
  • Two 9-lb tanks are awkward to lift and fill, and the body is bulky enough to look out of place in a small room.

Verified specifications

ModelEvap40 (EVAP40), Vornado SKU HU1-0045-65, tagged by Vornado as assembled in USA.
Typewhole-room evaporative (wick) humidifier, cool mist only, no warm mist.
Coverageup to 1,000 sq. ft.
Capacity4 gallons total in removable tanks. Retailers describe two 2-gallon tanks; Vornado and the owner’s guide confirm 4 gallons total and multiple removable tanks but not the split.
Outputup to 4 gallons in 24 hours on High. The owner’s guide puts a test condition on that: 4.0 gallons plus or minus 10% per 24 hours at 70 °F and 30% relative humidity, running continuously with the humidistat at max.
Fan speeds3 — Low, Medium, High — on one knob.
Humidity controlmechanical humidistat dial between MAX and MIN. MAX runs continuously, fully MIN will not operate, and the fan cycles off when the room reaches the set point.
Empty-tank protectionnone. No automatic shut-off when empty and no empty-tank indicator.
Display and appnone. No readout, no display, no Wi-Fi.
Power120 V, 60 Hz; 45.1 / 30.2 / 17.6 W for the three speeds. Northern Tool publishes 43 W on High; Consumer Reports lists 84 W as claimed wattage.
Energyabout 1.08 kWh per 24 hours on High, proportionally less on Low.
Cord8 ft, 2-pin polarized plug, no user-replaceable fuse.
Dimensions19.5 × 10.5 × 13.5 in (D × W × H); 9 lbs empty.
Clearancethe fan draws through the wicks and discharges out the top and sides, so it needs 6–8 inches of space around it, not pushed flat against a wall.
Additivesno aroma oils and no water conditioners. The owner’s guide says they can crack the plastic and void the warranty.
Warranty5 years, with Vornado stating it will replace a defective product to the original owner at no cost.
In the boxunit, two wick filters and the power cord. Replacement wicks are part MD1-0034, sold as a two-pack.
Full research notes and sources

How much humidity it actually delivers

Consumer Reports has the Evap40 in its humidifier lab program, marks it Recommended and describes it as very good in performance, intended for areas up to 1,000 square feet. Every sub-score it records, including output, noise, efficiency, hard-water performance and humidistat accuracy, sits behind a membership wall, so no measured figure from CR is readable.

Bob Vila’s 2026 evaporative roundup names it best for large rooms and supplies the one instrumented number any editorial outlet published: closer to 36 hours to empty the full tank at maximum humidity on High, with refills only every other day and a basement held near 45% relative humidity. That is slower delivery than the 24-hour headline implies, with a longer total run.

NY Times Wirecutter does not pick this model. Its evaporative choice is the smaller Vornado EV3, selected for having the most powerful fan it has measured on a humidifier, moving air seven times faster than the next-best unit and holding room humidity variance to 0.5%. The Evap40 appears in that guide only as an option for someone who needs something larger still.

The most concrete field evidence is one reviewer’s full heating season in a radiator-heated house: a 700–800 sq. ft. living room plus open hallway went from the low 20s to 40–45% in a few hours on Medium or High, and held there while the tanks were topped up. The same reviewer had a Levoit ultrasonic tower that would not pass 30–35% at full output, and called the 1,000 sq. ft. claim optimistic for that space. Nobody has measured this model in a room anywhere near 1,000 sq. ft.

Noise, controls and the empty-tank gap

On Medium the fan is audible like a room fan. On High it is loud: Bob Vila measured 48 dB on High, and the workable pattern owners describe is High or Medium in the evening and Low overnight. The tanks also gurgle as they release water into the base, which Vornado’s own troubleshooting guide calls normal, an owner of this exact model describing a glug-glug sound when water moves from the tank to the tray.

Controls are two dials and nothing else. The humidistat runs from MAX to MIN, the fan cycles off when the room reaches the set point, and there is no percentage readout, so one reviewer spent several days with a separate hygrometer to find where the knob cycles, around 40–45%. One ManualsLib questioner reports a unit whose humidistat never shut off once the room reached the desired humidity. That is isolated, but it is the one fault the humidistat exists to prevent.

The gap that matters most is at the dry end. Consumer Reports lists no automatic shut-off when empty and no empty-tank indicator, and Northern Tool’s answer to the same question says the unit continues to operate with empty tanks, so you must monitor the water levels manually. Retailer copy that advertises automatic shut-off is describing the humidistat stopping the fan at the set point. A machine that will run indefinitely on an empty base is a different ownership proposition from one that stops, and it lands on the same wick question the owner’s guide already raises when it tells you to empty the tank after each use.

Wicks, cleaning and what it costs to run

Wicks are the running cost. The owner’s guide puts their life at approximately 4–8 weeks depending on use, water hardness and environment, and warns that hard water, or water with lime or iron, shortens it. One reviewer felt them stiffen within a week or two on ordinary tap water and estimated 1–3 month replacement on hard water, against near-new wicks after a month on distilled water. An owner of this model reports the wick clogging in about a week. Owners say you cannot truly clean a wick, only scale it off with vinegar, and some add a bacteriostatic solution to the tanks. The genuine wick is part MD1-0034, a two-pack at $14.99 (Vornado, 2026), and at the guide’s replacement interval a year of round-the-clock use works out to about $97-$195 in wicks, or roughly half that over a six-month heating season.

The base takes a bleach cleaning: one teaspoon of chlorine bleach in one gallon of water, fill the base, wet all surfaces, stand 20 minutes, rinse until the odor is gone. Use canned air and a vacuum brush on the grilles. Empty the tank after every use, and clean it thoroughly if water sits longer than 8 hours. No gasoline, thinners or solvents.

New wicks give off a mild odor for the first few hours, which the guide documents as expected and harmless; for a strong smell it suggests a soak of 2 teaspoons of white vinegar in one gallon. There is no filter cartridge and no consumable electronic or water-treatment cartridge to buy.

Electricity is not where the money goes. Vornado rates the unit at 45.1 W on High, about 1.08 kWh per 24 hours at that setting, and proportionally less on Low. Northern Tool lists 43 W on the same unit; Consumer Reports lists 84 W as claimed wattage, which matches no other source.

Warranty is five years, and Vornado states it will replace a defective product to the original owner at no cost within that period. Nobody has documented a service part beyond the wicks: no fan, motor, humidistat or tank replacement channel is published for this model, and one owner asks outright whether the fan motor can be replaced. Long-lived units do exist — owners report third-year and five-year machines, and one buyer replaced a roughly 30-year-old Vornado with this one — but a unit run nearly constantly for about five years sometimes squeaks.

Is it worth it?

It is worth it in a big, dry room on soft water, and the decision variable is not price. It is room size, water hardness and noise tolerance.

Below roughly $110 this is a strong buy for a 700-plus square foot room; at $111-$140 it is fair if the capacity is genuinely useful. In October 2026 Walmart listed $104.99, Home Depot $109.99, Northern Tool and Sylvane $139.99, and Vornado’s own store $149.99, with Global Industrial at $169.95 and a distributor’s minimum advertised price at $173.60. At Vornado’s own $149.99 it is fair rather than good, because Wirecutter’s tested Vornado evaporative is the smaller EV3 at $99.99, with an electronic humidistat, ten fan speeds and top filling, and the premium buys tank capacity and coverage, not better measured air movement. Above $200 it is poor value next to Levoit’s Superior 6000S at $249.99, which adds a 6-gallon tank, app control and a claimed 3,000 sq. ft.

Under about 600 sq. ft. a smaller unit is the better purchase, and next to a bed, High is not the speed you want. On hard water, wick cost and wick life dominate what you pay over the years.

Which model this is

This page covers the Vornado Evap40, a whole-room evaporative (wick) humidifier, Vornado SKU HU1-0045-65 and manufacturer part EVAP40, tagged by Vornado as assembled in USA. Retail catalogs also carry it as MPN HU1-0045-65 and as model WBB2193460. The Amazon listing for this model is ASIN B00O0WOO74.

Do not confuse it with Vornado’s other evaporatives (EV100, EV200, EVC500, EV3) or its ultrasonic models (UH100, UH200); those are sized and rated separately. One Vornado customer, describing a unit already past its five-year warranty, says it stopped keeping up beyond 40% in an unusually cold, dry winter.

Sources

Manufacturer:

Independent reviews:

Retailer specifications and prices:

Owner reports:

Buying guides for this category

Related products