WaterVO Floor water-from-air unit plugged in beside white kitchen cabinets on a wood floor

Dry Winter Air: How Indoor Humidity Affects Water-From-Air Output

As the heat comes on this month, indoor air gets drier. That matters for a water-from-air unit, because it makes drinking water from the water vapor already in the room. Here is a quick way to check your room before you pick a spot for one.

What the EPA suggests for indoor humidity

The U.S. Environmental Protection Agency's guide to mold and moisture says to keep indoor humidity below 60 percent, ideally between 30 and 50 percent relative humidity, and notes that a small, inexpensive humidity meter can measure it. Source: EPA, A Brief Guide to Mold, Moisture and Your Home.

WaterVO Countertop water-from-air unit plugged in on a white kitchen counter next to stacked coffee cups
WaterVO Countertop Vapor Optimizer. Image: WaterVO

Why the room matters

Every water-from-air unit's output depends on the temperature and humidity of the room it sits in. A kitchen where people cook and boil water usually holds more moisture than a heated bedroom in December. Before you choose a spot, check the room with a humidity meter for a few days at different times.

Published output ranges

  • Spout Monolith, $1,495. Spout says output is 0.75 to 2.5 gallons a day, depending on temperature and humidity. See the Spout Monolith.
  • WaterVO Countertop Vapor Optimizer, $1,499. Makes up to about 2.5 gallons a day depending on humidity and temperature. See the Countertop Model.
  • WaterVO Floor Model Vapor Optimizer, $1,999. In coastal Southern California, expect roughly 1.5 to 2.5 gallons a day, and up to about 2.5 to 3.0 on humid summer days. See the Floor Model.
Spout Monolith with its lit water pitcher on a kitchen counter beside a potted plant
Spout Monolith. Photo: Spout

Three quick tips for winter

  • Pick the room you use most for cooking or gathering, not the driest corner of the house.
  • Keep the unit away from heater vents, which blow warm, dry air straight at it.
  • Expect output to shift with the seasons, and plan on the lower end of each range on dry winter days.

Hydrology University covers water basics and bottle and filter guides: hydrologyuniversity.com.

WaterVO: watervo.com · Hydrology University: hydrologyuniversity.com

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